VANGUARD PENNSYLVANIA TAX FREE FUND
N-30D, 2000-08-03
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VANGUARD(R) PENNSYLVANIA
TAX-EXEMPT FUNDS

MAY 31, 2000

VANGUARD PENNSYLVANIA
 TAX-EXEMPT MONEY
 MARKET FUND

VANGUARD PENNSYLVANIA
 INSURED LONG-TERM
 TAX-EXEMPT FUND

[SHIP]

[MEMBERS OF
THE VANGUARD GROUP(R) LOGO]

<PAGE>

HAVE THE PRINCIPLES OF INVESTING CHANGED?
In a world  of  frenetic  change  in  business,  technology,  and the  financial
markets,  it is natural to wonder whether the basic principles of investing have
changed.
     We don't think so.
     The most  successful  investors  over the coming  decade  will be those who
began the new century with a fundamental  understanding  of risk and who had the
discipline to stick with long-term investment programs.
     Certainly,  investors  today  confront a challenging,  even  unprecedented,
environment.  Valuations of market  indexes are at or near historic  highs.  The
strength and duration of the bull market in U.S.  stocks have inflated  people's
expectations  and  diminished  their  recognition  of the market's  considerable
risks. And the incredible  divergence in stock returns--many  technology-related
stocks  gained  100% or more in 1999,  yet prices fell for more than half of all
stocks--has made some investors question the idea of diversification.
     And then there is the  Internet.  Undeniably,  it is a powerful  medium for
communications and transacting business.  For investors,  the Internet is a vast
source  of  information  about  investments,  and  online  trading  has  made it
inexpensive and convenient to trade stocks and invest in mutual funds.
     However,  new tools do not guarantee good  workmanship.  Information is not
the same as wisdom.  Indeed,  much of the information,  opinion,  and rumor that
swirl  about  financial  markets  each day  amounts  to  "noise"  of no  lasting
significance.  And the fact  that  rapid-fire  trading  is easy does not make it
beneficial.   Frequent  trading  is  almost  always  counterpro-ductive  because
costs--even at low commission rates--and taxes detract from the returns that the
markets  provide.  Sadly,  many  investors jump into a "hot" mutual fund just in
time to see it  cool  off.  Meanwhile,  long-term  fund  investors  are  hurt by
speculative  trading  activity  because they bear part of the costs  involved in
accommodating purchases and redemptions.
     Vanguard  believes that  intelligent  investors  should  resist  short-term
thinking and focus instead on a few time-tested principles:
o    Invest for the long term. Pursuing your long-term  investment goals is more
     like a marathon than a sprint.
o    Diversify  your  investments  with  holdings  in  stocks,  bonds,  and cash
     investments.  Remember  that,  at any  moment,  some part of a  diversified
     portfolio  will lag  other  parts,  and be wary of  taking  on more risk by
     "piling onto" the  best-performing  part of your  holdings.  Today's leader
     could well be tomorrow's laggard.
o    Step back from the daily frenzy of the markets; focus on your overall asset
     allocation.
o    Capture as much of the market's return as possible by minimizing  costs and
     taxes.  Costs and taxes diminish  long-term  returns while doing nothing to
     reduce the risks you incur as an investor.

--------------------------------------------------------------------------------
CONTENTS

REPORT FROM THE CHAIRMAN......1                  FUND PROFILES...............8

THE MARKETS IN PERSPECTIVE....4                  PERFORMANCE SUMMARY........11

REPORT FROM THE ADVISER.......6                  FINANCIAL STATEMENTS.......13
--------------------------------------------------------------------------------

            All comparative mutual fund data are from Lipper Inc. or
                   Morningstar, Inc., unless otherwise noted.
    "Standard & Poor's(R)," "S&P(R)," "S&P 500(R)," "Standard & Poor's 500,"
           and "500" are trademarks of The McGraw-Hill Companies, Inc.
        Frank Russell Company is the owner of trademarks and copyrights
                        relating to the Russell Indexes.
            "Wilshire 5000(R)" and "Wilshire 4500" are trademarks of
                       Wilshire Associates Incorporated.

<PAGE>

1

[PHOTO OF JOHN J. BRENNAN]
JOHN J. BRENNAN

REPORT FROM THE CHAIRMAN

Interest rates for most municipal bonds  ratcheted  higher during the six months
ended May 31, 2000--the first half of Vanguard  Pennsylvania  Tax-Exempt  Funds'
fiscal year--and bond prices generally declined. In this environment,  municipal
bonds earned positive total returns, as price declines were not enough to offset
the interest income earned during the period.
     For the half-year,  our Insured  Long-Term  Tax-Exempt  Fund earned a total
return (capital  change plus  reinvested  dividends) of 1.4%, and our Tax-Exempt
Money Market Fund earned 1.9%. As you can see in the adjacent table, the returns
of both funds topped those of their average peers.

---------------------------------------------------------
                                           TOTAL RETURNS
                                         SIX MONTHS ENDED
                                           MAY 31, 2000
---------------------------------------------------------
VANGUARD PENNSYLVANIA TAX-EXEMPT
 MONEY MARKET FUND                             1.9%
(SEC 7-Day Annualized Yield: 4.05%)
Average Pennsylvania Tax-Exempt
 Money Market Fund*                            1.7
---------------------------------------------------------
VANGUARD PENNSYLVANIA INSURED
 LONG-TERM TAX-EXEMPT FUND                     1.4%
Average Pennsylvania Municipal
 Debt Fund*                                    0.1
---------------------------------------------------------
*Derived from data provided by Lipper Inc.

     The total  return of the Insured  Long-Term  Tax-Exempt  Fund is based on a
decrease  in net asset  value from $10.65 per share on  November  30,  1999,  to
$10.50 per share on May 31, 2000, and is adjusted for dividends  totaling $0.294
per share paid from net investment  income.  The Tax-Exempt  Money Market Fund's
net asset value remained at $1.00 per share, as was expected but not guaranteed.
     For  Pennsylvania  residents,  income  earned by our  funds is exempt  from
federal and Pennsylvania  income taxes, but may be subject to local taxes and to
the alternative minimum tax.
     On May 31, the Insured Long-Term Fund's yield stood at 5.64%, up from 5.17%
at the end of November  1999;  the Money Market Fund's yield was 4.05%,  up from
3.57% six months  earlier.  For  taxpayers  in the  highest  federal  income tax
bracket (39.6%),  the taxable  equivalent yields were about 9.3% for the Insured
Long-Term Fund and about 6.7% for the Money Market Fund.

THE PERIOD IN REVIEW
The U.S. economy expanded  impressively  during the six months ended May 31, but
the terrific  pace of economic  growth  stoked  fears of higher  inflation--and,
thus,  higher  interest  rates.  These fears put  pressure on the prices of both
stocks and bonds,  making it a volatile six months for stocks,  particularly for
technology shares, and a generally lackluster half-year for bonds.
     The Federal  Reserve Board  continued its campaign to head off inflation by
hiking its target  for  short-term  interest  rates by a full  percentage  point
during the  half-year.  The yield of the 10-year  U.S.  Treasury  note rose only
slightly,  to 6.27% on May 31 from  6.19% six months  earlier,  and the yield of
3-month Treasury bills rose by 32 basis points (0.32 percentage  point) to close
the period at 5.62%.  However,  the yield of the benchmark 30-year Treasury bond
fell from 6.29% on November  30, 1999,  to 6.01% on May 31,  2000.  This decline
resulted from the decreasing  supply of long-term  Treasury debt--a  development
that drove prices higher and yields lower for the longest-term Treasuries.

<PAGE>

2

     Yields of  high-grade,  long-term  municipal  bonds ended the  half-year at
5.91%,  up a tiny bit from  5.87%  when the period  began.  Yields on  top-grade
(MIG-1)  3-month notes rose 35 basis points to 4.15% on May 31.
     Relative to U.S. Treasury bonds,  longer-term municipal bonds are extremely
attractive, particularly for investors in higher income tax brackets. On May 31,
the yield of a high-grade,  long-term  municipal  bond was equal to about 98% of
the yield of the  30-year  U.S.  Treasury  bond,  whose  interest  is subject to
federal  income tax. The spread between  long-term  Treasury bonds and munis was
unusually  thin  because  of the  heavy  demand  for--and,  thus,  lower  yields
of--long-term Treasuries.  For securities with maturities of 10 years, the yield
of  municipal  bonds  was  equal to  about  85% of the  yield  of  Treasuries--a
proportion that is in line with the long-term historical rate.
     The U.S. stock market advanced during the six months,  though as the period
progressed  investors' favor shifted toward  value-oriented stocks and away from
growth  shares.  The Wilshire 5000 Total Market  Index,  a measure of the entire
U.S.  stock market,  gained 2.4% for the half-year.  Among  large-capitalization
stocks, the returns of value stocks outpaced those of growth-oriented  shares by
nearly 2  percentage  points  (3.6% for the  Standard & Poor's  500/BARRA  Value
Index;  1.9% for the S&P  500/BARRA  Growth  Index).  The split  was  especially
evident from March  through May,  when large value stocks gained 10.0% and large
growth stocks slipped -0.4%

PERFORMANCE OVERVIEW
Vanguard  Pennsylvania  Tax-Exempt  Money  Market  Fund  earned 1.9% for the six
months,  just ahead of the 1.7% return of our average peer.  Our margin over our
average competitor can be attributed to our much lower expenses, which give us a
significant  and  sustainable  advantage  over  funds  that  invest  in  similar
securities.
     The 1.4% total  return  earned by the  Insured  Long-Term  Tax-Exempt  Fund
during the half-year  exceeded the 0.1% return  achieved by our average peer and
the 1.0%  return of the Lehman  Brothers  Municipal  Bond  Index,  which  exists
outside the real world of operating expenses and transaction costs.
     Of course, a six-month return tells only part of the story of a bond fund's
performance.  We note that  semiannual  returns for bond funds  account for only
half of the year's interest income,  while prices fully and immediately  reflect
movements in interest rates--rising when rates fall and falling when rates rise.
For  perspective,  it's important to consider a full year's interest income when
evaluating a bond fund.  During the 12 months  ended May 31,  2000,  our Insured
Long-Term Tax-Exempt Fund recorded a negative total return of -1.0%,  consisting
of an income return of 5.3% and a price decline of -6.3%.
     Also, keep in mind that rising  interest rates,  which cause bond prices to
fall, are not entirely bad news for fixed income investors.  Money market yields
and returns quickly adjust higher.  And for long-term  bonds, a rise in interest
rates  causes an  immediate  price  decline,  but the  long-term  effect  can be
beneficial   because  there  is  more  income  to  reinvest  at  higher  yields.
Conversely, when interest rates drop, bond prices rise immediately, but over the
long haul, lower rates diminish the income earned on reinvested dividends.
     Though bond prices can swing dramatically, over the long run it is interest
income that accounts for  virtually all of a bond fund's total return.  As such,
municipal  bonds that now offer an  after-tax  yield of about 5.5% can provide a
solid  long-term  return,  particularly  if inflation  remains at relatively low
levels.
     A key  ingredient in our success is our  significant  cost  advantage  over
similar funds.Our funds have annualized expense ratios (expenses as a percentage
of average net assets) of less than 0.20%,  compared  with the 1.11%  charged by
the average long-term Pennsylvania

<PAGE>

3

tax-exempt  fund and the 0.60%  charged by the average  Pennsylvania  tax-exempt
money market fund. For our shareholders,  the benefits of low costs are twofold.
Our cost advantage  provides us with a head start in our quest to outperform our
competitors.  Lower  costs also allow our  investment  adviser,  Vanguard  Fixed
Income Group,  to select bonds with higher  credit  quality than those chosen by
our peers, without a sacrifice in net yields.
     For Vanguard  Pennsylvania  Insured Long-Term  Tax-Exempt Fund, our adviser
invests primarily in bonds that carry private insurance guaranteeing the payment
of principal  and interest in the event that a bond issuer  defaults on its debt
obligations.  Though these  securities  offer  slightly  lower gross yields than
noninsured  bonds,  our  low  costs  historically  have  more  than  made up the
difference,  allowing our fund to provide net returns that are fully competitive
with those of lower-quality municipal bond portfolios.

IN SUMMARY
The argument for holding  bonds as well as stocks in a balanced  portfolio is an
enduring one that is not based on past returns or projections of future returns.
Fixed income  investments  add to a  portfolio's  diversification,  and interest
income is a valuable and durable component of total return that, when compounded
over  long  periods,  plays  an  important  role  in  accumulating  wealth.  For
Pennsylvania residents,  the triple tax benefit of a Pennsylvania municipal bond
fund can be especially valuable.
     History has taught us that  investors who maintain  balanced  portfolios of
well- diversified stock funds, bond funds, and money market funds generally find
it easier to maintain  equilibrium in turbulent  times. We urge you to base your
investment plans on your own goals, time horizon,  and risk  tolerance--and then
to stick with those plans over the long haul.

/S/
John J. Brennan
Chairman and Chief Executive Officer

June 14, 2000




--------------------------------------------------------------------------------
IN MEMORY
--------------------------------------------------------------------------------
It is with  great  sadness  that I  report  the  death  of John C.  Sawhill,  an
independent  trustee of the fund and a member of The Vanguard  Group's  board of
directors  since 1991.  John, an economist who was president and chief executive
officer  of The  Nature  Conservancy,  died on May 18 at age 63. He was a senior
lecturer at the Harvard  Business School and had formerly served as president of
New York  University  and as deputy  secretary of the U.S.  Department of Energy
under President Jimmy Carter.  John was a remarkable man who was full of energy,
vigor,  and life. His experience and wisdom added a great deal to Vanguard,  and
his death is a blow to everyone  who knew and loved him.  Though  John's work on
behalf of our funds was often  carried on behind the scenes,  he was a dedicated
advocate for the best interests of our shareholders. He will be missed.

<PAGE>

4

THE MARKETS IN PERSPECTIVE
SIX MONTHS ENDED MAY 31, 2000

Strong  crosscurrents  pushed and  tugged at  financial  markets  during the six
months ended May 31, 2000.  Positive  influences  included very strong  economic
growth and rising corporate profits.  Negative factors included tighter monetary
policy, higher inflation, and concerns about stock valuations.
     Interest  rates rose in most  segments of the bond market,  and bond prices
slipped. Stock prices rose slightly, on balance,  although wide day-to-day price
swings were frequent.
     Uncertainty  in both the bond and stock markets  centered on the surprising
performance of the U.S.  economy,  which grew at a torrid 7.3% pace in the final
three  months of 1999 and at a  still-robust  5.4%  during the first  quarter of
2000.  With U.S.  unemployment  at around  4.0% of the  workforce,  the  Federal
Reserve Board  continued to be concerned that inflation  would worsen unless the
economic  expansion  slowed.  The Fed raised  short-term  interest rates by 0.25
percentage  point in February and again in March,  before boosting rates by 0.50
percentage    point    in    mid-May.    These    boosts,     following    three
quarter-percentage-point increases in 1999, took the Fed's target for short-term
rates to 6.5%.  By the end of May,  some  signs of  slowing  had  emerged in the
economy,  although it was not certain  that the Fed had  finished  applying  the
brakes.
     Evidence on inflation was  ambiguous.  The Consumer  Price Index  increased
1.8% and 3.1%, respectively, for the six- and twelve-month periods ended May 31,
but  much of the  increase  was due to  higher  energy  and  food  prices.  Core
inflation,  which excludes those  sectors,  was up a less-scary  2.4% during the
twelve months ended May 31.

--------------------------------------------------------------------------------
                                                  TOTAL RETURNS
                                            PERIODS ENDED MAY 31, 2000
                                   ---------------------------------------------
                                    6 MONTHS          1 YEAR         5 YEARS*
--------------------------------------------------------------------------------
STOCKS
  S&P 500 Index                        2.9%            10.5%           23.8%
  Russell 2000 Index                   5.5              9.9            13.5
  Wilshire 5000 Index                  2.4             10.7            22.3
  MSCI EAFE Index                      0.7             17.4            10.4
--------------------------------------------------------------------------------
BONDS
  Lehman Aggregate Bond Index          1.4%             2.1%           6.0%
  Lehman 10 Year Municipal Bond Index  0.7             -0.2            5.3
  Salomon Smith Barney 3-Month
   U.S. Treasury Bill Index            2.7              5.2            5.2
--------------------------------------------------------------------------------
OTHER
  Consumer Price Index                 1.8%             3.1%           2.4%
--------------------------------------------------------------------------------
*Annualized.

U.S. STOCK MARKETS
Optimism about long-term prospects for technology, media, and telecommunications
companies  dominated  the equity  markets  through the first three months of the
period.  But  sentiment  shifted  suddenly  in  mid-March,  sending the tech and
telecom  groups  sharply  lower.  The tech-heavy  Nasdaq  Composite  Index,  for
example, registered a 41.1% return from November 30 through February 29, only to
give back most of the gains  over the next  three  months.  End  result:  a 2.4%
return for the six months ended May 31.
     The overall  stock  market,  as measured by the Wilshire  5000 Index,  also
returned 2.4%.  Value stocks,  those  characterized  by  above-average  dividend
yields and below-average  price/earnings and price/book value ratios,  enjoyed a
resurgence beginning in mid-March.

<PAGE>

5

For the full six months,  the value components of both the  large-capitalization
S&P 500 Index and the  small-cap  Russell 2000 Index  outperformed  the indexes'
growth components.
     Within the S&P 500, the  half-year's  best return was the 48% gain recorded
by "other energy" stocks,  including  oil-drilling  and services  companies that
benefited from a continuing  rise in oil prices.  The  producer-durables  sector
gained  18%,  largely  because  of big gains for a number  of  manufacturers  of
telecommunications  gear and  semiconductor  testing and fabrication  equipment.
Technology  stocks,  which now account for about  one-quarter of the total stock
market's value, gained about 12% for the six months.
     Poor performers included the utilities sector (-14% return), which was hurt
by downturns in several large telephone stocks,  and many consumer staples (-9%)
and consumer-discretionary  (-6%) companies. Prices fell steeply for a number of
high-profile  retailers,  beverage  and  food  makers,  tobacco  companies,  and
entertainment enterprises.

U.S. BOND MARKETS
The Federal  Reserve's  influence on interest  rates is strongest for short-term
securities. Over the six months, the Fed pushed up the rate charged on overnight
loans  between  banks by 1  percentage  point to 6.5%.  Yields of  3-month  U.S.
Treasury bills rose only one-third as far (0.32  percentage  point,  or 32 basis
points),  to 5.62%.  And long-term  Treasury yields moved even less. The 10-year
Treasury  note rose just 8 basis  points to 6.27% as of May 31, and yields  fell
for very long-term  Treasury bonds due to a cutback in issuance of new bonds. As
a result of the shrinking  supply of long-term  bonds,  the yield of the 30-year
Treasury  bond  declined  28  basis  points--from  6.29%  to  6.01%--during  the
half-year.
     Because short-term rates moved higher while long-term rates declined, there
was an unusual "inversion" in the yield curve.  Instead of sloping  upward--with
yields  increasing  along with the  maturity of Treasury  securities--the  curve
sloped down. The 6.01% yield of 30-year Treasuries on May 31 was 70 basis points
below the 6.71% yield on 3-year Treasury notes.
     Corporate  and  municipal  bonds  did  not  perform  as  well  as  Treasury
securities,  and the yield curve for these sectors remained  positive--yields of
long-term bonds remained higher than those of short-term securities.  The Lehman
Aggregate  Bond Index,  a proxy for the overall  taxable bond  market,  returned
1.4%, as a price decline of 2% offset most of the 3.4% income  provided by bonds
during the half-year.

INTERNATIONAL STOCK MARKETS
A stronger  U.S.  dollar and weak Asian  markets made the half-year a lackluster
one for U.S.  investors in foreign stocks.  Improving economic growth in most of
the world  helped a number of  markets  in Europe,  Asia,  and Latin  America to
produce good gains in their local currencies. However, the U.S. dollar increased
in value versus most currencies,  significantly reducing the returns received by
dollar-based  investors.  (Conversely,  when the dollar falls in value,  returns
from abroad are enhanced for U.S. investors.)
     The overall  return in dollars from developed  foreign  markets was a scant
0.7%,  as  measured  by  the  Morgan  Stanley  Capital   International   Europe,
Australasia, Far East (EAFE) Index. However, in local currencies, the EAFE Index
return for the six months was a very respectable 7.8%.
     In  Europe,   where  stocks  benefited  from  a  continuance  of  corporate
acquisitions,  an average 12.8% gain in local-currency terms was reduced to 4.7%
for U.S.  investors  because of the  dollar's  strength.  Stocks in the  Pacific
region,  which is  dominated  by Japan,  returned  -7.0% in dollars,  as a -2.0%
return in local-currency terms was further diminished by the dollar's gains. The
Select Emerging Markets Free Index returned -2.8% in U.S. dollars.

<PAGE>

6

REPORT FROM THE ADVISER

The economy  continued its robust  expansion during the six months ended May 31,
2000,  the first half of the fiscal year for  Vanguard  Pennsylvania  Tax-Exempt
Funds.  The  unemployment  rate fell as low as 3.9% and the  economy  grew at an
annual rate of more than 5% during the half-year.
     A fear of  inflation  roiled the markets,  as  investors  focused on rising
short-term  rates.  On three  occasions the Federal  Reserve Board increased the
federal funds rate to slow economic  growth.  In turn,  this led to a noticeable
increase in stock market volatility.  Throughout the tumult, the tax-exempt bond
market remained relatively calm.
     A typical long-term,  high-quality municipal bond started the period with a
5.87% yield and ended it with a barely changed yield of 5.91%. Importantly,  the
transition from 1999 to 2000 went smoothly,  without negative effects for either
the issuers of municipal bonds or the financial markets.
     Although other markets were volatile during the half-year, tax-exempt bonds
were a solid, if unglamorous,  investment, and your funds continued to dutifully
turn out consistent tax-exempt dividends.  Often the municipal securities market
lacks the dramatic allure of the stock market.  However,  tax-exempt  securities
are a reliable workhorse for the total return of an investor's portfolio.
     The  Tax-Exempt  Money Market Fund earned a tax-free  return of 1.9% during
the  half-year,  while the Insured  Long-Term  Tax-Exempt  Fund  provided a 1.4%
return. Each fund outpaced the average return for its peer group of funds.

LOW DEMAND, LOW SUPPLY
During the  half-year,  few new  investors  entered the  municipal  bond market.
Indeed,  most  tax-exempt  funds  experienced net outflows of cash, as investors
redeemed shares to finance other purchases or to pay federal taxes.  During this
time,  the low demand for  municipal  bonds  improved  their  value  relative to
taxable  bonds.  For  example,  as of May 31, a highly  rated,  long-term  state
general  obligation  bond provided 98% of the income of a similar U.S.  Treasury
security,  even though  interest paid on the municipal bond is generally  exempt
from federal income tax,  while interest on Treasuries is not.  Investors in the
top (39.6%)  federal  income tax bracket,  therefore,  received  2.3  percentage
points in additional yield, after taxes, from high-quality, long-term muni bonds
than from  similar  Treasuries.  Such  attractive  relative  yields  have rarely
endured.
     The supply of newly issued  tax-exempt bonds so far in 2000 is a staggering
30% lower than last year. The stronger economy has boosted the finances of local
governments,  so fewer issuers need to tap the credit  markets.  The drop in new
municipal bond issuance has supported prices for existing tax-exempt securities,
especially in states with relatively high taxes. However, the effects of reduced
supply have  largely been offset by tepid demand for  municipal  bonds.  At some
point,  we can expect  that muni bond  prices  will rise in relation to those of
taxable bonds and that the spread between yields of municipals and taxable bonds
will widen.

--------------------------------------------------------------------------------
INVESTMENT PHILOSOPHY
The adviser  believes that each fund, while operating within stated maturity and
stringent  quality  targets,  can achieve a high level of current income that is
exempt from  federal and  Pennsylvania  income taxes by investing in insured and
high-quality  uninsured  securities issued by Pennsylvania  state,  county,  and
municipal governments.
--------------------------------------------------------------------------------

<PAGE>

7

MATURITY SPREADS NARROW, CREDIT SPREADS WIDEN
For municipal bonds, as for other fixed income investments, the spread in yields
between  issues  with  short- and  long-term  maturities  has  narrowed.  In the
tax-exempt market, the gap in yields between a 1-year bond and a 30-year bond is
only 1.4  percentage  points,  down from  about 2.0  percentage  points.  In the
Treasury bond market,  short-term  yields are  currently  higher than yields for
long-term bonds.  This is unusual,  because  investors  typically require higher
yields to lend  money for longer  periods.  The  anomaly  reflects  the  Federal
Reserve Board's raising of short-term  rates and the fall in supply of long-term
Treasury bonds.  Even if the Fed keeps raising  interest rates, we expect yields
for tax-exempt bonds to maintain their usual  upward-sloping  curve, with yields
rising as maturities increase.
     During the half-year,  the spread between yields of high-quality  municipal
bonds and yields of lower-quality  bonds widened.  This meant that lower-quality
bond prices lagged those of high-quality bonds and that investors were demanding
higher yields to take on higher credit risk. During the period, the extra income
paid by bonds with the lowest  investment-grade  rating  (Baa/BBB)  versus those
with the highest  quality (AAA)  increased from 0.50 to 0.75  percentage  point.
This  reversed  the trend of recent  years,  when  credit  spreads  narrowed  to
historical  lows as investors  stretched  for  incrementally  higher  returns by
buying lower-quality bonds.
     The trend  toward  wider  credit-quality  spreads  began with bonds used to
finance  hospitals and other health care facilities.  Most health care providers
have credit  ratings in the middle or lower tiers of  investment-grade  ratings.
Rising  cost  pressures  and  reductions  in expense  reimbursement  from health
insurers  have taken a toll.  Investors  are cautious and have  demanded  higher
yields to hold bonds from these issuers,  a trend that has spilled over into all
lower-quality  sectors.  As you have come to expect,  Vanguard has  maintained a
steady commitment to  higher-quality  issues. We have sought to provide superior
income by keeping expenses low, so that more of the funds' gross income flows to
you,  rather than by taking on increased  credit risk. The market's recent focus
on credit quality has helped our performance relative to peer funds.

THE TAX-EXEMPT MONEY MARKET FUND
The yield on the 1-year U.S.  Treasury  bill rose 49 basis  points to finish the
period at 6.17%.  This rise was a direct  result of the  earlier-mentioned  rate
hikes by the Fed. Yields on 1-year  tax-exempt money market  instruments rose 72
basis points during the six months.  The benchmark  1-year MIG-1 tax-exempt note
closed the period with a yield of 4.59%.  Short-term municipal securities became
more  attractive  relative to  Treasuries:  The ratio of yields of 1-year  MIG-1
notes to those of 1-year  Treasuries  increased during the six months from 68.1%
to 74.4%.  Contributing  to the rise in yields for  short-term  municipals was a
surge in redemptions  from tax-exempt  money market funds during tax season,  as
shareholders wrote checks to pay their federal tax liabilities.

Ian A. MacKinnon, Managing Director
Christopher M. Ryon, Principal
Pamela Wisehaupt Tynan, Principal
John M. Carbone, Principal
Christopher W. Alwine, Principal
VANGUARD FIXED INCOME GROUP

June 13, 2000

<PAGE>

8

FUND PROFILE
PENNSYLVANIA TAX-EXEMPT MONEY MARKET FUND

This  Profile  provides a snapshot of the fund's  characteristics  as of May 31,
2000. Key elements of this Profile are defined on page 9.

FINANCIAL ATTRIBUTES
----------------------------------
Yield                         4.1%
Average Maturity           32 days
Average Quality              MIG-1
Expense Ratio               0.18%*

*Annualized.

DISTRIBUTION BY CREDIT QUALITY
(% OF PORTFOLIO)
----------------------------------
MIG-1/SP-1+                  64.7%
A-1/P-1                      33.0
AAA/AA                        2.3
A                             0.0
----------------------------------
Total                       100.0%

<PAGE>

9

AVERAGE COUPON. The average interest rate paid on the securities held by a fund.
It is expressed as a percentage of face value.

AVERAGE  DURATION.  An  estimate  of how much a bond  fund's  share  price  will
fluctuate in response to a change in interest  rates. To see how the price could
shift,  multiply the fund's  duration by the change in rates.  If interest rates
rise by one percentage point, the share price of a fund with an average duration
of five years  would  decline  by about 5%. If rates  decrease  by a  percentage
point, the fund's share price would rise by 5%.

AVERAGE  MATURITY.  The average  length of time until bonds held by a fund reach
maturity  (or are  called) and are  repaid.  In general,  the longer the average
maturity, the more a fund's share price will fluctuate in response to changes in
market interest rates.

AVERAGE QUALITY.  An indicator of credit risk, this figure is the average of the
ratings assigned to a fund's securities holdings by credit-rating  agencies. The
agencies make their  judgment after  appraising an issuer's  ability to meet its
obligations.  Quality is graded on a scale,  with Aaa or AAA indicating the most
creditworthy  bond  issuers and A-1 or MIG-1  indicating  the most  creditworthy
issuers of money market securities.

BETA. A measure of the magnitude of a fund's past  share-price  fluctuations  in
relation  to the ups and downs of the  overall  market  (or  appropriate  market
index).  The market (or index) is assigned a beta of 1.00, so a fund with a beta
of 1.20  would have seen its share  price  rise or fall by 12% when the  overall
market rose or fell by 10%.

CASH  RESERVES.  The  percentage  of a  fund's  net  assets  invested  in  "cash
equivalents"--highly  liquid,  short-term,   interest-bearing  securities.  This
figure does not include  cash  invested in futures  contracts  to simulate  bond
investment.

DISTRIBUTION BY CREDIT QUALITY.  This breakdown of a fund's securities by credit
rating can help in gauging the risk that  returns  could be affected by defaults
or other credit problems.

DISTRIBUTION  BY MATURITY.  An indicator of interest rate risk. In general,  the
higher the  concentration  of  longer-maturity  issues,  the more a fund's share
price will  fluctuate in response to changes in interest  rates.

EXPENSE  RATIO.  The  percentage of a fund's  average net assets used to pay its
annual  administrative  and advisory  expenses.  These expenses  directly reduce
returns to investors.

INVESTMENT  FOCUS.  This  grid  indicates  the  focus  of a fund in terms of two
attributes: average maturity (short, medium, or long) and average credit quality
(high,  medium, or low).

NUMBER OF ISSUES.  An indicator of  diversification.  The more separate issues a
fund holds,  the less  susceptible  it is to a price  decline  stemming from the
problems of a particular issue.

R-SQUARED.  A measure of how much of a fund's past  returns can be  explained by
the returns from the overall market (or its benchmark  index). If a fund's total
return  were  precisely  synchronized  with the  overall  market's  return,  its
R-squared would be 1.00. If a fund's returns bore no relationship to the
market's returns, its R-squared would be 0.

YIELD.  A  snapshot  of a fund's  interest  income.  The yield,  expressed  as a
percentage  of the fund's net asset  value,  is based on income  earned over the
past 30 days (7 days for money  market  funds) and is  annualized,  or projected
forward for the coming year.

YIELD  TO  MATURITY.  The  rate of  return  an  investor  would  receive  if the
securities held by a fund were held to their maturity dates.

<PAGE>

10

FUND PROFILE
PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND

This  Profile  provides a snapshot of the fund's  characteristics  as of May 31,
2000,  compared where  appropriate to an unmanaged  index.  Key elements of this
Profile are defined on page 9.


FINANCIAL ATTRIBUTES
-----------------------------------------------------
                  PENNSYLVANIA INSURED         LEHMAN
                             LONG-TERM         INDEX*
-----------------------------------------------------
Number of Issues                   255         38,998
Yield                             5.6%             --
Yield to Maturity                 5.6%             --
Average Coupon                    5.4%           5.5%
Average Maturity            13.0 years     13.4 years
Average Quality                    AAA            AA+
Average Duration             8.1 years      7.5 years
Expense Ratio                  0.17%**             --
Cash Reserves                     1.2%             --

 *Lehman Municipal Bond Index.
**Annualized.

INVESTMENT FOCUS
------------------------------
[GRID]

AVERAGE MATURITY          LONG
CREDIT QUALITY            HIGH

VOLATILITY MEASURES
---------------------------------------------
            PENNSYLVANIA INSURED       LEHMAN
                       LONG-TERM       INDEX*
---------------------------------------------
R-Squared                   0.98         1.00
Beta                        1.05         1.00

*Lehman Municipal Bond Index.

DISTRIBUTION BY CREDIT QUALITY
(% OF PORTFOLIO)
------------------------------
AAA                      98.8%
AA                        1.2
A                         0.0
BBB                       0.0
BB                        0.0
B                         0.0
------------------------------
Total                   100.0%

DISTRIBUTION BY MATURITY
(% OF PORTFOLIO)
----------------------------
Under 1 Year            6.9%
1-5 Years              19.2
5-10 Years             10.5
10-20 Years            41.6
20-30 Years            21.8
Over 30 Years           0.0
----------------------------
Total                 100.0%

<PAGE>

11

PERFORMANCE SUMMARIES

All of the data on this page represent past performance, which cannot be used to
predict future  returns that may be achieved by the fund.  Note that returns can
fluctuate  widely.  An  investment  in a money  market  fund is not  insured  or
guaranteed by the Federal Deposit Insurance  Corporation or any other government
agency.  Although the fund seeks to preserve the value of your  investment at $1
per share, it is possible to lose money by investing in the fund.

PENNSYLVANIA TAX-EXEMPT MONEY MARKET FUND
TOTAL INVESTMENT RETURNS: JUNE 13, 1988-MAY 31, 2000
----------------------------------------------------
         PENNSYLVANIA TAX-EXEMPT        AVERAGE
           MONEY MARKET FUND              FUND*
FISCAL   CAPITAL   INCOME    TOTAL        TOTAL
YEAR     RETURN    RETURN    RETURN      RETURN
----------------------------------------------------
1988      0.0%      2.5%      2.5%        2.5%
1989      0.0       6.4       6.4         6.4
1990      0.0       5.9       5.9         5.9
1991      0.0       4.6       4.6         4.6
1992      0.0       3.0       3.0         2.9
1993      0.0       2.4       2.4         2.2
1994      0.0       2.6       2.6         2.4
----------------------------------------------------
----------------------------------------------------
         PENNSYLVANIA TAX-EXEMPT        AVERAGE
           MONEY MARKET FUND              FUND*
FISCAL   CAPITAL   INCOME    TOTAL        TOTAL
YEAR     RETURN    RETURN    RETURN      RETURN
----------------------------------------------------
1995      0.0%      3.7%      3.7%        3.5%
1996      0.0       3.4       3.4         3.1
1997      0.0       3.5       3.5         3.2
1998      0.0       3.3       3.3         3.0
1999      0.0       3.1       3.1         2.7
2000**    0.0       1.9       1.9         1.7
----------------------------------------------------
SEC 7-Day Annualized Yield (5/31/2000): 4.05%
----------------------------------------------------
 *Average  Pennsylvania  Tax-Exempt Money Market Fund;
  derived from data provided by Lipper Inc.
**Six months ended May 31, 2000.
See Financial Highlights table on page 24 for dividend
information for the past five years.

AVERAGE ANNUAL TOTAL RETURNS: PERIODS ENDED MARCH 31, 2000*
--------------------------------------------------------------------------------
                                                                  10 YEARS
                             INCEPTION                   -----------------------
                               DATE     1 YEAR   5 YEARS  CAPITAL  INCOME  TOTAL
--------------------------------------------------------------------------------
Pennsylvania Tax-Exempt
Money Market Fund            6/13/1988  3.27%    3.38%    0.00%    3.45%   3.45%
--------------------------------------------------------------------------------
*SEC rules require that we provide this average annual total return  information
through the latest calendar quarter.

<PAGE>

12

All of the data on this page represent past performance, which cannot be used to
predict  future returns that may be achieved by the fund.  Note,  too, that both
share  price and  return  can  fluctuate  widely.  An  investor's  shares,  when
redeemed, could be worth more or less than their original cost.

PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND
TOTAL INVESTMENT RETURNS: APRIL 7, 1986-MAY 31, 2000
------------------------------------------------
        PENNSYLVANIA INSURED LONG-TERM
               TAX-EXEMPT FUND           LEHMAN*
FISCAL    CAPITAL   INCOME   TOTAL       TOTAL
YEAR      RETURN    RETURN   RETURN      RETURN
------------------------------------------------
1986       3.0%      4.7%      7.7%        8.1%
1987      -9.9       6.6      -3.3        -0.2
1988       4.5       7.5      12.0        10.6
1989       4.7       7.5      12.2        11.0
1990       0.3       7.0       7.3         7.7
1991       2.8       6.9       9.7        10.3
1992       5.0       6.7      11.7        10.0
1993       5.8       6.1      11.9        11.1
------------------------------------------------
------------------------------------------------
       PENNSYLVANIA INSURED LONG-TERM
              TAX-EXEMPT FUND            LEHMAN*
FISCAL    CAPITAL   INCOME   TOTAL       TOTAL
YEAR      RETURN    RETURN   RETURN      RETURN
------------------------------------------------
1994       10.7%     5.3%     -5.4%       -5.2%
1995       12.0      6.5      18.5        18.9
1996        0.2      5.6       5.8         5.9
1997        0.7      5.5       6.2         7.2
1998        2.1      5.5       7.6         7.8
1999       -6.7      5.0      -1.7        -1.1
2000**     -1.4      2.8       1.4         1.0
------------------------------------------------
 *Lehman Municipal Bond Index.
**Six months ended May 31, 2000.
See  Financial  Highlights  table  on page 25 for  dividend  and  capital  gains
information for the past five years.

AVERAGE ANNUAL TOTAL RETURNS: PERIODS ENDED MARCH 31, 2000*
--------------------------------------------------------------------------------
                                                                 10 YEARS
                             INCEPTION                   -----------------------
                                DATE    1 YEAR  5 YEARS  CAPITAL  INCOME   TOTAL
--------------------------------------------------------------------------------
Pennsylvania Insured Long-Term
Tax-Exempt Fund               4/7/1986   0.11%   5.61%    1.20%    5.95%   7.15%
--------------------------------------------------------------------------------
*SEC rules require that we provide this average annual total return  information
through the latest calendar quarter.

<PAGE>

13

FINANCIAL STATEMENTS
MAY 31, 2000 (UNAUDITED)

STATEMENT OF NET ASSETS
This Statement  provides a detailed list of each fund's municipal bond holdings,
including each security's  market value on the last day of the reporting  period
and information on credit enhancements  (insurance or letters of credit).  Other
assets are added to, and  liabilities  are  subtracted  from, the value of Total
Municipal  Bonds to  calculate  the fund's Net Assets.  Finally,  Net Assets are
divided by the  outstanding  shares of the fund to arrive at its share price, or
Net Asset Value (NAV) Per Share.
     At the end of the Statement of Net Assets, you will find a table displaying
the  composition of the fund's net assets on both a dollar and per-share  basis.
Undistributed Net Investment Income is usually zero because the fund distributes
its net income to  shareholders  as a dividend each day. Any realized gains must
be distributed  annually,  so the bulk of net assets consists of Paid in Capital
(money invested by shareholders). The balance shown for Accumulated Net Realized
Gains usually approximates the amount available to distribute to shareholders as
taxable  capital gains as of the statement  date, but may differ because certain
investments or transactions may be treated  differently for financial  statement
and tax purposes. Any Accumulated Net Realized Losses, and any cumulative excess
of  distributions  over net realized  gains,  will appear as negative  balances.
Unrealized  Appreciation  (Depreciation) is the difference  between the value of
the funds'  investments  and their cost,  and reflects the gains  (losses)  that
would be  realized  if the fund  were to sell  all of its  investments  at their
statement-date values.
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
PENNSYLVANIA TAX-EXEMPT MONEY MARKET FUND                            COUPON           DATE                (000)             (000)
----------------------------------------------------------------------------------------------------------------------------------
MUNICIPAL BONDS (98.9%)
----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>               <C>
Allegheny County PA GO                                                7.20%      12/1/2000 (Prere.)     $ 3,130           $ 3,179
Allegheny County PA Higher Educ. Auth. VRDO (Univ. of Pittsburgh)     4.25%       6/8/2000 LOC           30,230            30,230
Allegheny County PA Higher Educ. Building Auth. VRDO
 (Carnegie Mellon Univ.)                                              4.35%       6/2/2000               66,150            66,150
Allegheny County PA Hosp. Dev. Auth. Rev. VRDO
 (Children's Hosp.-Pittsburgh)                                        4.40%       6/8/2000 (1)           28,800            28,800
Allegheny County PA Hosp. Dev. Auth. Rev. VRDO
 (Presbyterian Univ. Health System)                                   4.40%       6/8/2000 (1)           34,000            34,000
Allegheny County PA Hosp. Dev. Auth. Rev. VRDO
 (Presbyterian Univ. Health System)                                   4.40%       6/8/2000 LOC            8,940             8,940
Allegheny County PA IDA PCR VRDO (Duquesne Light Co.)                 4.30%       6/7/2000 (2)           47,925            47,925
Beaver County PA IDA CP (Duquesne Light Co.)                          3.95%       7/6/2000 (2)           43,500            43,500
Beaver County PA IDA CP (Duquesne Light Co.)                          4.05%      7/14/2000 (2)           34,900            34,900
Beaver County PA IDA PCR VRDO (Duquesne Light Co.)                    4.15%       6/7/2000 (2)           15,000            15,000
Beaver County PA IDA PCR VRDO (Duquesne Light Co.)                    4.20%       6/7/2000 (2)           12,500            12,500
Berks County PA GO                                                    7.25%     11/15/2000 (3)(Prere.)   19,695            20,371
Berks County PA IDA VRDO (Lutheran Health Care)                       4.15%       6/7/2000 (2)           11,245            11,245
Chester County PA IDA VRDO (Archdiocese of Philadelphia)              4.35%       6/2/2000 LOC           24,400            24,400
Cumberland County PA Municipal Auth. College Rev. PUT
 (Dickinson College)                                                  3.80%      11/1/2000 LOC           19,880            19,880
Dallastown Area School Dist. York County PA GO VRDO                   4.38%       6/8/2000 (3)           19,885            19,885
Daniel Boone PA Area School Dist. VRDO                                4.15%       6/7/2000 (2)           10,000            10,000
Dauphin County PA General Auth. Hosp. Rev. VRDO
 (Reading Hosp. & Medical Center)                                     4.10%       6/7/2000               13,865            13,865
Delaware County PA IDA Airport Fac. Rev. VRDO
 (United Parcel Service)                                              4.30%       6/2/2000               34,200            34,200
Delaware County PA IDA PCR CP (PECO)                                  4.00%      6/12/2000 (3)            9,500             9,500
Delaware County PA IDA PCR CP (PECO)                                  4.00%      6/13/2000 (3)           34,900            34,900
Delaware County PA IDA PCR CP (PECO)                                  4.00%      9/14/2000 (3)           12,600            12,600
Delaware County PA IDA PCR CP (PECO)                                  4.05%      7/12/2000 (3)           11,400            11,400
Delaware County PA IDA PCR CP (PECO)                                  4.05%      7/20/2000 (3)           16,000            16,000
</TABLE>

<PAGE>

14

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
PENNSYLVANIA TAX-EXEMPT MONEY MARKET FUND                            COUPON           DATE                (000)             (000)
----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                    <C>               <C>
Delaware County PA IDA PCR CP (PECO)                                  4.30%      6/13/2000 (3)         $ 21,400          $ 21,400
Delaware County PA IDA PCR VRDO (BP Exploration & Oil)                4.30%       6/2/2000                8,700             8,700
Delaware County PA IDA PCR VRDO (PECO)                                4.30%       6/2/2000 LOC            4,500             4,500
Delaware County PA IDA Solid Waste Rev. VRDO (Scott Paper Co.)        4.25%       6/7/2000               76,305            76,305
Delaware County PA IDA VRDO (General Electric Capital Corp.)          3.95%       6/7/2000               44,175            44,175
Franklin County PA IDA Healthcare Rev. VRDO (Chambersburg Hosp.)      4.40%       6/8/2000 (2)            5,000             5,000
Geisinger Health System Auth. of Pennsylvania VRDO
 (Penn State Geisinger Health System)                                 4.35%       6/2/2000               47,235            47,235
Lancaster County PA VRDO                                              4.38%       6/8/2000 (3)            5,000             5,000
Lehigh County PA Health Network VRDO
 (Lehigh Valley Health System)                                        4.35%       6/2/2000 (1)            3,000             3,000
Lehigh County PA Health Network VRDO
 (Lehigh Valley Health System)                                        4.35%       6/2/2000 (2)           12,600            12,600
Lehigh County PA IDA PCR TOB VRDO (Pennsylvania Power & Light)        4.35%       6/8/2000 (1)+           6,350             6,350
Mercerburg Borough PA Auth. VRDO (Mercersburg College)                4.30%       6/7/2000 LOC            7,500             7,500
Montgomery County PA GO                                               6.10%     10/15/2000 (Prere.)       3,000             3,025
Montgomery County PA IDA PCR CP (PECO)                                4.00%      7/13/2000               11,800            11,800
Montgomery County PA IDA PCR CP (PECO)                                4.05%      6/12/2000 LOC           11,640            11,640
Montgomery County PA VRDO                                             4.15%       6/7/2000                  400               400
Northampton County PA Higher Educ. Auth. Rev. VRDO (Lehigh Univ.)     4.35%       6/8/2000               15,485            15,485
Northeastern PA Hosp. & Educ. Auth. VRDO
 (Wyoming Valley Health Care Obligated Group)                         4.10%       6/7/2000 (2)           50,300            50,300
Northeastern PA Hosp. Auth. Rev.
 (Hosp. Central Services Capital Asset Financing Program)             4.05%      9/22/2000 (1)           14,120            14,120
Pennsbury PA School Dist. VRDO                                        4.15%       6/8/2000 (3)           10,000            10,000
Pennsylvania CP                                                       3.95%      7/20/2000               21,200            21,200
Pennsylvania GO                                                       4.50%      10/1/2000               19,850            19,903
Pennsylvania GO                                                       5.00%     10/15/2000                9,440             9,476
Pennsylvania GO                                                       5.40%       7/1/2000                2,000             2,004
Pennsylvania GO                                                       6.75%       1/1/2001 (Prere.)       3,875             3,991
Pennsylvania Higher Educ. Assistance Agency
Student Loan Rev.                                                     4.625%     12/1/2000 LOC            9,900             9,934
Pennsylvania Higher Educ. Assistance Agency
Student Loan Rev. VRDO                                                4.10%       6/7/2000 LOC          149,500           149,500
Pennsylvania Higher Educ. Assistance Agency
Student Loan Rev. VRDO                                                4.15%       6/7/2000 (2)           12,800            12,800
Pennsylvania Higher Educ. Assistance Agency
Student Loan Rev. VRDO                                                4.40%       6/7/2000 LOC           20,000            20,000
Pennsylvania Higher Educ. Fac. Auth. Rev.                             4.50%      11/1/2000 LOC           20,700            20,793
Pennsylvania Higher Educ. Fac. Auth. Rev.                             5.00%      6/15/2000 (4)            1,290             1,291
Pennsylvania Higher Educ. Fac. Auth. Rev. PUT (St. Joseph's Univ.)    3.80%      11/1/2000 LOC           17,800            17,800
Pennsylvania Higher Educ. Fac. Auth. Rev. PUT (St. Joseph's Univ.)    4.20%       4/1/2001 LOC            3,200             3,200
Pennsylvania Higher Educ. Fac. Auth. Rev. VRDO
 (Carnegie Mellon Univ.)                                              4.35%       6/2/2000              103,250           103,250
Pennsylvania Higher Educ. Fac. Auth. Rev. VRDO (Temple Univ.)         4.30%       6/2/2000 LOC           31,800            31,800
Pennsylvania Higher Educ. Fac. Auth. Rev. VRDO
 (Univ. of Pennsylvania)                                              4.30%       6/7/2000 LOC           18,980            18,980
Pennsylvania Intergovernmental Cooperation Auth. Rev.                 5.75%      6/15/2000 (3)            6,695             6,700
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 6.00%      6/15/2000 (ETM)          3,670             3,673
Pennsylvania Public School Building Auth. VRDO
 (Parkland School Dist.)                                              4.33%       6/8/2000 (3)           11,445            11,445
Pennsylvania Higher Educ. Fac. Auth. (Medical College of PA)          7.25%       3/1/2001 (Prere.)       3,000             3,124
Pennsylvania Turnpike Comm. Oil Franchise Tax Rev. TOB VRDO           4.38%       6/8/2000 (2)+          16,045            16,045
Pennsylvania Turnpike Comm. Rev. VRDO                                 4.35%       6/2/2000               19,800            19,800
Philadelphia PA GO                                                    6.00%     11/15/2000 (3)           11,995            12,105
Philadelphia PA Hosp. & Higher Educ. Fac. Auth. Rev. VRDO
 (Children's Hosp.)                                                   4.35%       6/2/2000               56,900            56,900
Philadelphia PA Hosp. & Higher Educ. Fac. Auth. Rev. VRDO
 (Children's Hosp.)                                                   4.35%       6/2/2000               30,235            30,235
Philadelphia PA IDA VRDO (Cancer Research)                            4.35%       6/2/2000 LOC            4,600             4,600
Philadelphia PA School Dist. TRAN                                     4.00%      6/30/2000 LOC           47,500            47,518
Philadelphia PA School Dist. TOB VRDO                                 4.35%       6/8/2000 +              4,120             4,120
</TABLE>

<PAGE>
15

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------------
                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
                                                                     COUPON           DATE                (000)             (000)
----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>             <C>
Philadelphia PA TRAN                                                  4.25%      6/30/2000              $20,000         $  20,004
Philadelphia PA Water & Waste Water Rev. VRDO                         4.05%       6/7/2000 (2)           56,300            56,300
Sayre PA Health Care Fac. Auth. VRDO
 (VHA of Pennsylvania, Pooled Capital Asset Financial Program)        4.15%       6/7/2000 (2)           74,700            74,700
Scranton-Lackawanna PA Health & Welfare Auth. VRDO
 (Mercy Health System)                                                4.15%       6/7/2000                6,300             6,300
Somerset County PA General Auth.                                      6.45%     10/15/2000 (ETM)          2,000             2,019
South Fork PA Hosp. Auth. Rev. VRDO (Conemaugh Valley Hosp.)          4.35%       6/2/2000 (1)            7,300             7,300
Spring-Ford Area PA School Dist. TOB VRDO                             4.38%       6/8/2000 (4)+           3,573             3,573
St. Mary's Hosp. Auth. PA VRDO (Catholic Health Initiatives)          4.05%       6/7/2000               18,600            18,600
Temple Univ. PA Higher Educ. GO                                       5.00%      5/10/2001               27,000            27,182
Univ. of Pittsburgh PA Higher Educ.                                   5.20%      5/23/2001               20,000            20,103
Univ. of Pittsburgh PA Higher Educ. RAN                               4.00%      6/30/2000               19,000            19,009
Univ. of Pittsburgh PA Higher Educ. VRDO                              4.25%       6/8/2000 LOC           23,000            23,000
Washington County PA Higher Educ. VRDO
 (Pooled Equipment Lease Program)                                     4.35%       6/7/2000 LOC           30,635            30,635
York County PA IDA PCR VRDO (PECO)                                    4.30%       6/2/2000 LOC           10,940            10,940
OUTSIDE PENNSYLVANIA:
Puerto Rico Govt. Dev. Bank VRDO                                      3.40%       6/7/2000 (1)           44,700            44,700
Puerto Rico Highway & Transp. Auth. VRDO                              3.50%       6/7/2000                6,500             6,500
Puerto Rico TRAN                                                      4.50%      7/30/2000               17,000            17,020
----------------------------------------------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
 (COST $1,971,977)                                                                                                      1,971,977
----------------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.1%)
----------------------------------------------------------------------------------------------------------------------------------
Other Assets--Note B                                                                                                       28,949
Liabilities                                                                                                                (7,638)
                                                                                                                       -----------
                                                                                                                           21,311
----------------------------------------------------------------------------------------------------------------------------------
NET ASSETS (100%)
----------------------------------------------------------------------------------------------------------------------------------
Applicable to 1,993,329,014 outstanding $.001 par value shares of beneficial interest
(unlimited authorization)                                                                                              $1,993,288
==================================================================================================================================

NET ASSET VALUE PER SHARE                                                                                                   $1.00
==================================================================================================================================
</TABLE>
*See Note A in Notes to Financial Statements.
+Securities  exempt from  registration  under Rule 144A of the Securities Act of
 1933. These securities may be sold in transac- tions exempt from  registration,
 normally to qualified  institutional  buyers.  At  May 31, 2000, the  aggregate
 value of these securities was $30,088,000, representing 1.5% of net assets.
For key to abbreviations and other references, see page 21.

--------------------------------------------------------------
AT MAY 31, 2000, NET ASSETS CONSISTED OF:
--------------------------------------------------------------
                                              AMOUNT       PER
                                                (000)    SHARE
--------------------------------------------------------------
Paid in Capital                           $1,993,328     $1.00
Undistributed Net Investment Income               --        --
Accumulated Net Realized Losses                  (40)       --
Unrealized Appreciation                           --        --
--------------------------------------------------------------
NET ASSETS                                $1,993,288     $1.00
==============================================================

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16

<TABLE>
<CAPTION>
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                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND                       COUPON           DATE                (000)             (000)
---------------------------------------------------------------------------------------------------------------------------------
MUNICIPAL BONDS (98.8%)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>               <C>
ISSUER INSURED (93.5%)
Allegheny County PA Airport Rev. (Pittsburgh International Airport)   5.00%       1/1/2017 (1)          $12,205           $10,932
Allegheny County PA Airport Rev. (Pittsburgh International Airport)   5.00%       1/1/2019 (1)           15,750            13,838
Allegheny County PA GO                                                0.00%       5/1/2003 (2)            8,815             7,552
Allegheny County PA GO                                                6.00%       5/1/2010 (2)            3,030             3,088
Allegheny County PA GO                                                6.00%       5/1/2012 (2)            3,000             3,112
Allegheny County PA Hosp. Dev. Auth. Rev. (Catholic Health East)      5.25%     11/15/2013 (2)            1,000               935
Allegheny County PA Hosp. Dev. Auth. Rev. (Magee Women's Hosp.)       6.00%      10/1/2010 (3)            4,235             4,424
Allegheny County PA Hosp. Dev. Auth. Rev.
 (Presbyterian Univ. Health System)                                   6.00%      11/1/2002 (1)(Prere.)    3,000             3,068
Allegheny County PA Hosp. Dev. Auth. Rev. (Univ. of Pittsburgh)       5.125%      7/1/2022 (1)            5,960             5,131
Allegheny County PA Hosp. Dev. Auth. Rev. (Univ. of Pittsburgh)       5.60%       4/1/2017 (1)            2,000             1,908
Allegheny County PA Port Auth.                                        6.00%       3/1/2011 (1)            1,840             1,910
Allegheny County PA Port Auth.                                        6.00%       3/1/2012 (1)            4,310             4,451
Allegheny County PA Port Auth.                                        6.00%       3/1/2016 (1)            2,565             2,635
Allegheny County PA Port Auth.                                        6.00%       3/1/2024 (1)           16,000            15,958
Allegheny County PA Port Auth.                                        6.25%       3/1/2016 (1)            3,740             3,872
Allegheny County PA Port Auth.                                        6.25%       3/1/2017 (1)            2,000             2,063
Allegheny County PA Sanitation Auth. Sewer Rev.                       5.50%      12/1/2013 (3)           13,100            12,880
Allegheny County PA Sanitation Auth. Sewer Rev.                       5.50%      12/1/2016 (3)           33,665            32,291
Allegheny County PA Sanitation Auth. Sewer Rev.                       6.00%      12/1/2019 (1)           54,630            54,905
Allegheny County PA Sanitation Auth. Sewer Rev.                       6.25%      12/1/2014 (1)            9,660            10,046
Allegheny County PA Sanitation Auth. Sewer Rev.                       6.50%      12/1/2011 (3)            8,000             8,153
Altoona PA Water Rev. Auth.                                           6.50%      11/1/2004 (3)(Prere.)   13,790            14,765
Altoona PA Water Rev. Auth.                                           6.50%      11/1/2019 (3)              210               217
Beaver County PA IDA PCR (Ohio Edison)                                7.00%       6/1/2021 (3)           22,715            23,549
Beaver County PA IDA PCR (Ohio Edison)                                7.10%       6/1/2018 (3)            5,000             5,100
Berks County PA GO                                                    0.00%     11/15/2013 (3)(ETM)       7,250             3,294
Berks County PA GO                                                    0.00%     11/15/2014 (3)(ETM)       8,615             3,660
Berks County PA GO                                                    0.00%     11/15/2015 (3)(ETM)       6,250             2,484
Berks County PA GO                                                    5.75%     11/15/2012 (3)            7,750             7,776
Berks County PA Hosp. Rev. (Reading Hosp.)                            5.70%      10/1/2014 (1)            4,500             4,478
Berks County PA Hosp. Rev. (Reading Hosp.)                            6.10%      10/1/2023 (1)           16,500            16,356
Berks County PA IDA VRDO (Lutheran Health Care)                       4.15%       6/7/2000 (2)           10,000            10,000
Blair County PA Hosp. Auth. Rev. (Altoona Hosp.)                      5.00%       7/1/2022 (2)            5,315             4,469
Blair County PA Hosp. Auth. Rev. (Altoona Hosp.)                      5.50%       7/1/2016 (2)            4,480             4,300
Blair County PA Hosp. Auth. Rev. (Altoona Hosp.)                      6.50%       7/1/2002 (2)(Prere.)    8,500             8,904
Butler County PA GO                                                   6.00%      7/15/2012 (3)            5,185             5,254
Center City Philadelphia PA Business Improvement                      5.50%      12/1/2015 (2)            6,955             6,764
Center Township PA Sewer Auth. Rev.                                   5.50%      4/15/2011 (1)            2,375             2,369
Central Dauphin PA School Dist. GO                                    0.00%       6/1/2004 (2)            4,800             3,876
Chester County PA Health & Educ. Fac. Auth. Rev.
 (Chester County Hosp.)                                              5.875%       7/1/2016 (1)            7,870             7,785
Chester County PA Health & Educ. Fac. Auth. Rev.
 (Jefferson Health System)                                           5.125%      5/15/2018 (2)           12,445            10,959
Chester County PA Health & Educ. Fac. Auth. Rev.
 (Jefferson Health System)                                            5.25%      5/15/2022 (2)           36,580            32,123
Coatesville PA School Dist. GO                                        5.75%       4/1/2007 (4)(Prere.)   10,080            10,371
Corry PA Area School Dist. GO                                         5.50%     12/15/2010 (1)            4,000             4,006
Council Rock PA School Dist. GO                                       4.75%     11/15/2017 (3)            7,000             5,987
Dauphin County PA General Auth. Health System Rev.
 (West Pennsylvania Hosp.)                                            5.50%       7/1/2013 (1)            5,000             4,917
Delaware County PA Auth. Rev. (Catholic Health East)                  5.25%     11/15/2012 (2)            3,435             3,246
Delaware County PA Auth. Rev. (Catholic Health East)                  5.25%     11/15/2013 (2)            4,665             4,361
Delaware County PA Auth. Rev.
 (Delaware County Memorial Hosp.)                                     5.50%      8/15/2013 (1)           12,000            11,648
Delaware County PA Auth. Rev. (Villanova Univ.)                       5.00%      12/1/2028 (1)           26,885            22,724
Delaware River Joint Toll Bridge Comm. PA & NJ Rev.                   6.00%       7/1/2018 (3)            3,040             3,052
Delaware River Port Auth. PA & NJ Rev. Dist. Project                  5.70%       1/1/2023 (4)            8,345             8,128
</TABLE>

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17

<TABLE>
<CAPTION>
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                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
                                                                     COUPON           DATE                (000)             (000)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>               <C>
Delaware River Port Auth. PA & NJ Rev.                                5.50%       1/1/2026 (3)          $13,025           $12,227
Dover Township PA Sewer Auth. Rev.                                    5.55%      11/1/2022 (1)            4,000             3,779
Erie County PA Hosp. Auth. Rev. (St. Vincent Health Care)            6.125%       7/1/2013 (1)            3,900             3,986
Erie PA School Dist. GO                                               0.00%       9/1/2010 (4)            5,665             3,146
Erie PA School Dist. GO                                               0.00%       9/1/2011 (4)            5,780             3,021
Erie PA School Dist. GO                                               0.00%       9/1/2013 (4)            2,780             1,272
Erie PA School Dist. GO                                               0.00%       9/1/2016 (4)            5,785             2,162
Fort LeBoeuf PA School Dist. GO                                       5.80%       1/1/2003 (1)(Prere.)    5,500             5,600
Garnet Valley PA School Dist. GO                                      5.70%       4/1/2011 (2)            3,000             3,010
Greensburg Salem PA School Dist. GO                                   6.45%      9/15/2018 (1)            7,500             7,673
Hazelton PA Area School Dist. GO                                      0.00%       3/1/2017 (3)            4,425             1,602
Hazleton PA Area School Dist. GO                                      5.50%       3/1/2011 (3)            3,740             3,740
Hazleton PA Area School Dist. GO                                      6.00%       3/1/2016 (3)           18,245            18,807
Lancaster County PA GO                                                6.25%       5/1/2013 (3)++          4,370             4,584
Lancaster County PA GO                                                6.25%       5/1/2014 (3)++          4,605             4,812
Lancaster PA Higher Educ. Auth. Rev. (Franklin & Marshall College)    6.60%      4/15/2010 (1)            4,940             5,055
Lancaster PA Higher Educ. Auth. Rev. (Franklin & Marshall College)    6.70%      4/15/2012 (1)            4,000             4,105
Lancaster PA School Dist. GO                                         5.375%      2/15/2017 (3)            5,590             5,286
Lehigh County PA General Purpose Hosp. Auth. Rev.
 (Lehigh Valley Health Network)                                       5.00%       7/1/2028 (1)           15,905            13,143
Lehigh County PA General Purpose Hosp. Auth. Rev.
 (Lehigh Valley Health Network)                                      5.625%       7/1/2005 (1)(Prere.)      800               828
Lehigh County PA General Purpose Hosp. Auth. Rev.
 (Lehigh Valley Health Network)                                      5.625%       7/1/2025 (1)            9,200             8,542
Lehigh County PA General Purpose Hosp. Auth. Rev.
 (Lehigh Valley Health Network)                                       5.70%       7/1/2010 (1)            3,905             3,925
Lehigh County PA General Purpose Hosp. Auth. Rev.
 (Lehigh Valley Health Network)                                       7.00%       7/1/2016 (1)            4,415             4,974
Manheim PA Central School Dist. GO                                    6.85%       3/1/2008 (3)            2,705             2,744
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2004 (1)            1,040               824
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2005 (1)            1,050               786
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2006 (1)            2,015             1,424
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2007 (1)            2,080             1,385
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2008 (1)            2,270             1,423
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2009 (1)            2,020             1,192
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2010 (1)            1,840             1,021
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2011 (1)            1,835               955
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2014 (1)            2,040               868
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2015 (1)            2,040               817
McKeesport PA Area School Dist. GO                                    0.00%      10/1/2016 (1)            4,655             1,742
Montgomery County PA Higher Educ. & Health Auth. Rev.
 (Abington Memorial Hosp.)                                            5.00%       6/1/2028 (2)            8,660             7,158
Montgomery County PA Higher Educ. & Health Auth. Rev.
 (Abington Memorial Hosp.)                                            6.00%       6/1/2003 (2)(Prere.)    8,140             8,484
Montgomery County PA Higher Educ. & Health Auth. Rev.
 (Abington Memorial Hosp.)                                            6.10%       6/1/2012 (2)            5,000             5,093
Montgomery County PA Higher Educ. & Health Auth. Rev.
 (Pottstown Healthcare)                                               5.00%       1/1/2027 (4)            6,250             5,187
Montgomery County PA Higher Educ. & Health Auth. Rev.
 (Pottstown Healthcare)                                              5.375%       1/1/2012 (4)            5,085             4,892
Mount Lebanon PA Hosp. Dev. Auth. Rev. (St. Clair Memorial Hosp.)     6.25%       7/1/2006 (3)            9,250             9,716
Nazareth PA School Dist. GO                                           5.50%      5/15/2005 (2)(Prere.)    1,500             1,524
Neshaminy PA School Dist. GO                                          5.70%      2/15/2014 (3)            8,795             8,789
North Hills PA School Dist. GO                                        5.25%     11/15/2007 (3)(Prere.)    7,440             7,444
North Penn PA Water Auth. Rev.                                       6.125%      11/1/2010 (3)            5,140             5,255
North Wales PA Water Auth. Rev.                                      6.125%      11/1/2002 (3)(Prere.)    3,000             3,079
Northampton County PA Hosp. Auth. Rev. (Easton Hosp.)                 6.25%       1/1/2019 (1)           10,000            10,056
Northampton County PA Hosp. Auth. Rev. (Easton Hosp.)                7.875%       1/1/2019 (5)              285               289
Northampton County PA IDA PCR (Metro. Edison)                         6.10%      7/15/2021 (1)            4,410             4,427
Northeastern PA Hosp. & Educ. Health Rev. (Wyoming Valley Health)     5.25%       1/1/2016 (2)            6,560             6,004
Northeastern PA Hosp. & Educ. Health Rev. (Wyoming Valley Health)     5.25%       1/1/2026 (2)            5,350             4,647
</TABLE>

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18

<TABLE>
<CAPTION>
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                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND                       COUPON           DATE                (000)             (000)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>               <C>
Owen J. Roberts School Dist. PA GO                                   5.375%      5/15/2018 (1)          $ 4,565           $ 4,278
Penn Trafford PA School Dist. GO                                      5.85%       5/1/2004 (1)(Prere.)    2,435             2,500
Pennsylvania Convention Center Auth. Rev.                             0.00%       9/1/2004 (3)(ETM)       5,000             3,988
Pennsylvania Convention Center Auth. Rev.                             6.00%       9/1/2019 (3)(ETM)      14,275            14,502
Pennsylvania Convention Center Auth. Rev.                             6.70%       9/1/2016 (3)(ETM)      19,150            21,141
Pennsylvania GO                                                       5.00%     11/15/2015 (2)            5,000             4,562
Pennsylvania GO                                                      5.125%      3/15/2017 (2)            7,990             7,312
Pennsylvania GO                                                      5.375%      5/15/2010 (3)           13,800            13,742
Pennsylvania GO                                                      5.375%      5/15/2012 (3)           16,570            16,276
Pennsylvania GO                                                      5.375%      5/15/2014 (3)           14,000            13,540
Pennsylvania GO                                                      5.375%      5/15/2016 (3)            5,000             4,766
Pennsylvania GO                                                       5.75%      10/1/2015 (3)           19,850            19,848
Pennsylvania Higher Educ. Assistance Agency Capital Acquisition      6.125%     12/15/2016 (1)            2,000             2,048
Pennsylvania Higher Educ. Auth. Rev.
 (Allegheny/Delaware Valley Obligated Group)                         5.875%     11/15/2016 (1)           20,000            19,679
Pennsylvania Higher Educ. Auth. Rev.
 (Allegheny/Delaware Valley Obligated Group)                         5.875%     11/15/2021 (1)            9,545             9,190
Pennsylvania Higher Educ. Auth. Rev. (Bryn Mawr College)             5.125%      12/1/2029 (2)            5,000             4,312
Pennsylvania Higher Educ. Auth. Rev. (Bryn Mawr College)             5.625%      12/1/2014 (1)            2,200             2,184
Pennsylvania Higher Educ. Auth. Rev. (College & Univ.)                7.20%       1/1/2004 (2)            2,120             2,124
Pennsylvania Higher Educ. Auth. Rev. (Temple Univ.)                   5.00%       4/1/2029 (1)           13,700            11,568
Pennsylvania Higher Educ. Auth. Rev. (Temple Univ.)                   5.25%       4/1/2011 (1)            3,545             3,453
Pennsylvania Higher Educ. Auth. Rev. (Temple Univ. )                  5.25%       4/1/2016 (1)            4,000             3,742
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 4.75%      6/15/2023 (3)           13,000            10,608
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 5.25%      6/15/2014 (3)           10,765            10,221
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 5.25%      6/15/2015 (3)            5,205             4,910
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 5.25%      6/15/2017 (3)            8,830             8,182
Pennsylvania Intergovernmental Cooperative Auth. Rev.                5.625%      6/15/2013 (3)            2,605             2,594
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 6.00%      6/15/2000 (3)(ETM)       2,000             2,001
Pennsylvania Intergovernmental Cooperative Auth. Rev.                 7.00%      6/15/2005 (3)(Prere.)    2,250             2,434
Pennsylvania State Univ.                                              5.00%      8/15/2027 (2)           10,000             8,494
Pennsylvania Turnpike Comm. Oil Franchise Tax Rev.                    4.75%      12/1/2027 (2)           13,060            10,559
Pennsylvania Turnpike Comm. Oil Franchise Tax Rev.                    5.00%      12/1/2023 (2)           24,325            20,937
Pennsylvania Turnpike Comm. Oil Franchise Tax Rev.                   5.125%      12/1/2016 (2)            4,735             4,371
Pennsylvania Turnpike Comm. Oil Franchise Tax Rev.                    6.00%      12/1/2004 (2)(Prere.)    7,450             7,820
Pennsylvania Turnpike Comm. Rev.                                      5.50%      12/1/2017 (3)+          16,000            15,341
Pennsylvania Turnpike Comm. Rev.                                      5.75%      12/1/2012 (2)           10,000            10,059
Pennsylvania Turnpike Comm. Rev.                                      6.00%       6/1/2015 (1)           28,800            29,012
Pennsylvania Turnpike Comm. Rev.                                      6.25%       6/1/2011 (2)           14,390            14,735
Philadelphia PA Airport Rev.                                          5.00%       7/1/2023 (3)            5,100             4,272
Philadelphia PA Airport Rev.                                         5.125%       7/1/2028 (3)           17,100            14,370
Philadelphia PA Airport Rev.                                          5.75%      6/15/2010 (3)            4,440             4,528
Philadelphia PA GO                                                    5.00%      3/15/2028 (4)           15,000            12,624
Philadelphia PA GO                                                    5.00%      5/15/2020 (1)            8,000             6,975
Philadelphia PA GO                                                    5.25%      3/15/2014 (4)            2,000             1,900
Philadelphia PA GO                                                    5.25%      3/15/2015 (4)            2,600             2,454
Philadelphia PA GO                                                    6.00%     11/15/2004 (3)(Prere.)    6,880             7,234
Philadelphia PA GO                                                    6.00%     11/15/2010 (3)            1,065             1,096
Philadelphia PA GO                                                    6.00%     11/15/2011 (3)            1,145             1,176
Philadelphia PA GO                                                    6.00%     11/15/2012 (3)            1,270             1,296
Philadelphia PA GO                                                    6.00%     11/15/2013 (3)              715               728
Philadelphia PA Gas Works Rev.                                        5.00%       7/1/2028 (4)            5,000             4,174
Philadelphia PA Gas Works Rev.                                        5.25%       7/1/2011 (4)            3,965             3,839
Philadelphia PA Gas Works Rev.                                       5.375%       7/1/2012 (4)            4,000             3,891
Philadelphia PA Gas Works Rev.                                       5.375%       7/1/2014 (4)            4,810             4,606
Philadelphia PA Hosp. & Higher Educ. Fac. Auth. Rev.
 (Jefferson Health System)                                           5.125%      5/15/2018 (2)            5,700             5,036
Philadelphia PA Parking Auth. Rev.                                    5.25%       9/1/2029 (4)            3,530             3,092
Philadelphia PA Parking Auth. Rev.                                    5.40%       9/1/2011 (2)            4,520             4,454
Philadelphia PA Parking Auth. Rev.                                    5.40%       9/1/2012 (2)            5,990             5,859
Philadelphia PA Parking Auth. Rev.                                    5.40%       9/1/2015 (2)            6,350             6,085
</TABLE>

<PAGE>

19

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------------------
                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
                                                                     COUPON           DATE                (000)             (000)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>               <C>
Philadelphia PA Parking Auth. Rev.                                    5.50%       9/1/2018 (2)          $ 4,250           $ 4,034
Philadelphia PA School Dist. GO                                       0.00%       7/1/2001 (2)           11,750            11,137
Philadelphia PA School Dist. GO                                       5.25%       4/1/2015 (1)            4,000             3,775
Philadelphia PA School Dist. GO                                       5.25%       4/1/2017 (1)            3,000             2,781
Philadelphia PA School Dist. GO                                       5.50%       9/1/2005 (2)(Prere.     1,150             1,187
Philadelphia PA School Dist. GO                                       5.50%       9/1/2015 (2)            9,330             9,048
Philadelphia PA School Dist. GO                                       5.50%       9/1/2018 (2)            4,000             3,797
Philadelphia PA School Dist. GO                                       5.50%       9/1/2025 (2)           15,000            13,847
Philadelphia PA Water & Waste Water Rev.                              5.50%       8/1/2014 (1)           12,900            12,577
Philadelphia PA Water & Waste Water Rev.                              5.60%       8/1/2018 (1)            5,920             5,685
Philadelphia PA Water & Waste Water Rev.                              6.25%       8/1/2011 (1)            3,750             3,992
Philadelphia PA Water & Waste Water Rev.                              7.00%      6/15/2010 (3)           33,865            37,770
Philadelphia PA Water & Waste Water Rev.                              7.00%      6/15/2011 (3)           35,685            40,006
Pine Richland School Dist. PA GO                                      5.50%       9/1/2019 (4)            3,430             3,250
Pittsburgh PA GO                                                     5.125%       9/1/2014 (3)           10,435             9,749
Pittsburgh PA GO                                                     5.125%       9/1/2015 (3)            7,795             7,237
Pittsburgh PA GO                                                      5.25%       9/1/2017 (3)            4,980             4,612
Pittsburgh PA GO                                                      5.50%       9/1/2014 (2)           10,500            10,306
Pittsburgh PA GO                                                      5.75%       9/1/2016 (3)            4,505             4,481
Pittsburgh PA GO                                                      6.00%       9/1/2018 (3)            4,450             4,487
Pittsburgh PA GO                                                      6.25%       9/1/2001 (1)(Prere.)   11,030            11,434
Pittsburgh PA Public Parking Auth. Rev.                              5.875%      12/1/2012 (3)            8,200             8,279
Pittsburgh PA School Dist. GO                                         0.00%       8/1/2009 (2)            4,000             2,383
Pittsburgh PA Water & Sewer System Rev.                               5.00%       9/1/2019 (4)            5,170             4,530
Pittsburgh PA Water & Sewer System Rev.                               5.25%       9/1/2022 (4)            2,495             2,233
Pittsburgh PA Water & Sewer System Rev.                               7.25%       9/1/2014 (3)(ETM       25,210            28,225
Pittsburgh PA Water & Sewer System Rev.                              7.625%       9/1/2004 (3)(ETM)       5,370             5,750
Pocono Mountain PA School Dist. GO                                    5.75%      10/1/2009 (2)            6,000             6,037
Reading PA GO                                                        5.875%     11/15/2002 (2)(Prere.)    4,175             4,259
Reading PA GO                                                        5.875%     11/15/2012 (2)           13,825            13,911
Ridley PA School Dist. GO                                             5.00%     11/15/2029 (3)           16,655            14,043
Sayre PA Health Care Fac. Auth. Rev. (Guthrie Health Care System)     7.00%       3/1/2011 (2)            2,000             2,066
Sayre PA Health Care Fac. Auth. VRDO
 (VHA of Pennsylvania, Pooled Capital Asset Financial Program)        4.15%       6/7/2000 (2)            2,400             2,400
Scranton-Lackawanna PA Health & Welfare Auth. Rev.
 (Mercy Health System)                                               5.625%       1/1/2016 (1)            5,490             5,289
Scranton-Lackawanna PA Health & Welfare Auth. Rev.
 (Mercy Health System)                                                5.70%       1/1/2023 (1)            9,205             8,681
Seneca Valley PA School Dist. GO                                      5.75%       7/1/2002 (3)(Prere.)    2,000             2,031
South Fork PA Hosp. Auth. Rev. (Conemaugh Valley Hosp.)              5.625%       7/1/2010 (6)+           2,300             2,316
South Fork PA Hosp. Auth. Rev. (Conemaugh Valley Hosp.)               5.75%       7/1/2018 (6)            7,000             6,891
Southeastern PA Transp. Auth. Rev.                                   5.375%       3/1/2017 (3)            2,500             2,364
Southeastern PA Transp. Auth. Rev.                                   5.375%       3/1/2022 (3)           15,825            14,559
Southeastern PA Transp. Auth. Rev.                                    5.45%       3/1/2011 (3)            3,730             3,703
Southwestern PA School Dist. GO                                       6.40%      6/15/2002 (3)(Prere.)    3,825             4,001
Spring-Ford Area School Dist. PA                                      4.75%       3/1/2025 (3)            3,125             2,552
St. Mary's Hosp. Auth. Langhorne PA Rev.
 (Franciscan Health System)                                           7.00%       7/1/2009 (5)            1,000             1,020
St. Mary's Hosp. Auth. Langhorne PA Rev.
 (Franciscan Health System                                            7.00%       7/1/2013 (5)            5,050             5,149
St. Mary's Hosp. Auth. Langhorne PA Rev.
 (Franciscan Health System)                                           7.00%      6/15/2015 (5)            1,770             1,791
Univ. of Pittsburgh PA                                                5.00%       6/1/2021 (1)            7,145             6,214
Univ. of Pittsburgh PA                                                5.25%       6/1/2017 (3)            6,995             6,497
Univ. of Pittsburgh PA                                                5.50%       6/1/2010 (1)            5,285             5,315
Univ. of Pittsburgh PA                                                5.50%       6/1/2014 (1)           11,780            11,544
Univ. of Pittsburgh PA                                               6.125%       6/1/2002 (1)(Prere.)   12,525            13,020
Univ. of Pittsburgh PA                                               6.125%       6/1/2021 (1)           13,545            13,590
Univ. of Pittsburgh PA                                                6.25%       6/1/2012 (1)            1,490             1,524
Univ. of Pittsburgh PA of Higher Educ. Capital Project               5.125%       6/1/2027 (3)            4,700             4,084
Upper Darby PA School Dist. GO                                        5.00%       5/1/2019 (2)            5,970             5,251
</TABLE>

<PAGE>

20

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------------------
                                                                                                           FACE            MARKET
                                                                                  MATURITY               AMOUNT            VALUE*
PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND                       COUPON           DATE                (000)             (000)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>        <C>                     <C>            <C>
Washington County PA Hosp. Auth. Rev. (Shadyside Hosp.)              5.875%     12/15/2002 (2)(Prere.)  $22,000        $   22,847
Washington County PA Hosp. Auth. Rev. (Washington Hosp.)              6.75%       7/1/2012 (2)           10,000            10,214
West Allegheny PA School Dist. GO                                     6.25%       8/1/2002 (2)(Prere.)    6,155             6,282
West Jefferson Hills PA School Dist. GO                               5.90%       8/1/2010 (3)            3,160             3,195
West Jefferson Hills PA School Dist. GO                               5.95%       8/1/2014 (3)            7,180             7,215
West Mifflin PA School Dist. GO                                       5.35%      2/15/2009 (3)            1,555             1,550
West Mifflin PA School Dist. GO                                      5.625%      8/15/2005 (3)(Prere.)    7,000             7,156
Westmoreland County PA Auth. Rev.                                    6.125%       7/1/2017 (1)(ETM)       8,205             8,581
York County PA Hosp. Auth. Rev. (York Hosp.)                          5.25%       7/1/2017 (2)            3,500             3,173
York County PA Hosp. Auth. Rev. (York Hosp.)                          5.25%       7/1/2023 (2)            8,675             7,612
York County PA Solid Waste & Refuse Auth. Rev.                        5.50%      12/1/2013 (3)            6,750             6,699
York County PA Solid Waste & Refuse Auth. Rev.                        5.50%      12/1/2014 (3)            4,050             3,998
York PA City Sewer Auth. Rev.                                         0.00%      12/1/2012 (1)            3,235             1,566
                                                                                                                       -----------
                                                                                                                        1,656,082
                                                                                                                       -----------
NONINSURED (5.3%)
Allegheny County PA Higher Educ. Auth. VRDO (Univ. of Pittsburgh)     4.25%       6/8/2000 LOC            4,000             4,000
Allegheny County PA Higher Educ. Building Auth. VRDO
 (Carnegie Mellon Univ.)                                              4.35%       6/2/2000                  200               200
Delaware County PA IDA Airport Fac. Rev. VRDO
 (United Parcel Service)                                              4.30%       6/2/2000                  200               200
Geisinger Health System Auth. of Pennsylvania VRDO
 (Penn State Geisinger Health System)                                 4.35%       6/2/2000               17,700            17,700
Lower Merion Township PA School Dist. GO                              5.00%      5/15/2023               10,300             8,956
Montgomery County PA GO                                               5.00%      7/15/2019                8,800             7,806
Montgomery County PA GO                                               5.00%      7/15/2024                8,905             7,616
Montgomery County PA GO                                              5.375%     10/15/2025                7,930             7,192
Montgomery County PA GO                                               5.40%      9/15/2019                2,360             2,228
Pennsylvania GO                                                       5.40%       7/1/2000                4,000             4,002
Pennsylvania Higher Educ. Fac. Auth. Rev. VRDO
 (Carnegie Mellon Univ.)                                              4.35%       6/2/2000                  700               700
Pennsylvania Higher Educ. Fac. Auth. Rev. VRDO
 (Carnegie Mellon Univ.)                                              4.35%       6/2/2000                6,900             6,900
Pennsylvania Housing Single Family Mortgage Finance Agency Rev.       5.40%      10/1/2024                7,250             7,097
Pennsylvania Housing Single Family Mortgage Finance Agency Rev.       6.15%      10/1/2020                5,000             4,971
Pennsylvania Housing Single Family Mortgage Finance Agency Rev.       6.90%       4/1/2017                3,795             3,867
Philadelphia PA Hosp. & Higher Educ. Fac. Auth. Rev. VRDO
 (Children's Hosp. Project)                                           4.35%       6/2/2000                5,900             5,900
St. Mary's Hosp. Auth. Bucks County PA Rev.
 (Catholic Health System)                                            5.375%      12/1/2011                2,525             2,389
St. Mary's Hosp. Auth. Bucks County PA Rev.
 (Catholic Health System)                                            5.375%      12/1/2013                2,340             2,165
                                                                                                                       -----------
                                                                                                                           93,889
                                                                                                                       -----------
----------------------------------------------------------------------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
 (COST $1,781,882)                                                                                                      1,749,971
----------------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.2%)
----------------------------------------------------------------------------------------------------------------------------------
Other Assets--Note B                                                                                                       35,950
Liabilities                                                                                                               (14,505)
                                                                                                                       -----------
                                                                                                                           21,445
----------------------------------------------------------------------------------------------------------------------------------
NET ASSETS (100%)
----------------------------------------------------------------------------------------------------------------------------------
Applicable to 168,684,498 outstanding $.001 par value shares of beneficial interest
(unlimited authorization)                                                                                              $1,771,416
==================================================================================================================================

NET ASSET VALUE PER SHARE                                                                                                  $10.50
==================================================================================================================================
 *See Note A in Notes to Financial Statements.
 +Securities with a value of $3,884,000 have been segregated as initial margin for open futures contracts.
++Security purchased on a when-issued or delayed delivery basis for which the fund has not taken delivery as of May 31, 2000.
For key to abbreviations and other references, see page 21.
</TABLE>

<PAGE>

21

--------------------------------------------------------------------------------
                                                            AMOUNT          PER
                                                             (000)        SHARE
--------------------------------------------------------------------------------
AT MAY 31, 2000, NET ASSETS CONSISTED OF:
--------------------------------------------------------------------------------
Paid in Capital                                         $1,804,917       $10.70
Undistributed Net Investment Income                             --           --
Overdistributed Net Realized Gains                          (1,539)        (.01)
Unrealized Depreciation--Note F
 Investment Securities                                     (31,911)        (.19)
 Futures Contracts                                             (51)          --
--------------------------------------------------------------------------------
NET ASSETS                                              $1,771,416       $10.50
================================================================================

KEY TO ABBREVIATIONS

CP--Commercial Paper.
GO--General Obligation Bond.
IDA--Industrial Development Authority Bond.
PCR--Pollution Control Revenue Bond.
PUT--Put Option Obligation.
RAN--Revenue Anticipation Note.
TOB--Tender Option Bond.
TRAN--Tax Revenue Anticipation Note.
VRDO--Variable Rate Demand Obligation.
(ETM)--Escrowed to Maturity.
(Prere.)--Prerefunded.

Scheduled principal and interest payments are guaranteed by:
(1) MBIA (Municipal Bond Insurance Association).
(2) AMBAC (Ambac Assurance Corporation).
(3) FGIC (Financial Guaranty Insurance Company).
(4) FSA (Financial Security Assurance).
(5) BIGI (Bond Investors Guaranty Insurance).
(6) Connie Lee Inc.
The insurance does not guarantee the market value of the municipal bonds.

LOC--Scheduled  principal and interest payments are guaranteed by bank letter of
credit.

<PAGE>

22

STATEMENT OF OPERATIONS
This Statement shows interest  earned by each fund during the reporting  period,
and details the operating  expenses charged to the fund. These expenses directly
reduce the amount of  investment  income  available  to pay to  shareholders  as
tax-exempt  income  dividends.  This  Statement  also shows any Net Gain  (Loss)
realized  on the  sale of  investments,  and the  increase  or  decrease  in the
Unrealized  Appreciation  (Depreciation) on investments  during the period. If a
fund  invested  in futures  contracts  during the  period,  the results of these
investments are shown separately.

--------------------------------------------------------------------------------
                                                                   PENNSYLVANIA
                                               PENNSYLVANIA             INSURED
                                                 TAX-EXEMPT           LONG-TERM
                                               MONEY MARKET          TAX-EXEMPT
                                                       FUND                FUND
                                             -----------------------------------
                                                SIX MONTHS ENDED MAY 31, 2000
                                             -----------------------------------
                                                      (000)               (000)
--------------------------------------------------------------------------------
INVESTMENT INCOME
INCOME
    Interest                                        $38,338             $51,333
                                             -----------------------------------
        Total Income                                 38,338              51,333
                                             -----------------------------------
EXPENSES
    The Vanguard Group--Note B
        Investment Advisory Services                    117                 107
        Management and Administrative                 1,433               1,303
        Marketing and Distribution                      204                 131
    Custodian Fees                                       11                  10
    Auditing Fees                                         4                   4
    Shareholders' Reports                                 9                  12
    Trustees' Fees and Expenses                           1                   1
                                             -----------------------------------
        Total Expenses                                1,779               1,568
        Expenses Paid Indirectly--Note C                (11)                (45)
                                             -----------------------------------
        Net Expenses                                  1,768               1,523
--------------------------------------------------------------------------------
NET INVESTMENT INCOME                                36,570              49,810
--------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)
    Investment Securities Sold                           (1)              4,477
    Futures Contracts                                    --                  --
--------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)                                 (1)              4,477
--------------------------------------------------------------------------------
CHANGE IN UNREALIZED APPRECIATION (DEPRECIATION)
    Investment Securities                                --             (29,793)
    Futures Contracts                                    --                 (51)
--------------------------------------------------------------------------------
CHANGE IN UNREALIZED APPRECIATION (DEPRECIATION)         --             (29,844)
--------------------------------------------------------------------------------
NET INCREASE IN NET ASSETS RESULTING
 FROM OPERATIONS                                    $36,569             $24,443
================================================================================

<PAGE>

23

STATEMENT OF CHANGES IN NET ASSETS
This  Statement  shows how each fund's total net assets  changed  during the two
most recent reporting periods.  The Operations  section  summarizes  information
detailed in the Statement of Operations. Because the fund distributes its income
to shareholders  each day, the amounts of  Distributions--Net  Investment Income
generally equal the net income earned as shown under the Operations section. The
amounts of Distributions--Realized  Capital Gain may not match the capital gains
shown in the Operations section,  because  distributions are determined on a tax
basis and may be made in a period different from the one in which the gains were
realized on the financial  statements.  The Capital Share  Transactions  section
shows the amount shareholders  invested in the fund, either by purchasing shares
or by reinvesting  distributions,  and the amounts  redeemed.  The corresponding
numbers of Shares Issued and Redeemed are shown at the end of the Statement.

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------------
                                     PENNSYLVANIA TAX-EXEMPT        PENNSYLVANIA INSURED LONG-TERM
                                        MONEY MARKET FUND                   TAX-EXEMPT FUND
                                  -----------------------------    -------------------------------
                                     SIX MONTHS           YEAR          SIX MONTHS           YEAR
                                          ENDED          ENDED               ENDED          ENDED
                                   MAY 31, 2000  NOV. 30, 1999        MAY 31, 2000  NOV. 30, 1999
                                          (000)          (000)               (000)          (000)
--------------------------------------------------------------------------------------------------
<S>                                <C>           <C>                  <C>           <C>
INCREASE (DECREASE) IN NET ASSETS
OPERATIONS
    Net Investment Income                36,570         58,475              49,810        101,053
    Realized Net Gain (Loss)                 (1)            (3)              4,477            545
    Change in Unrealized Appreciation
     (Depreciation)                          --             --             (29,844)      (136,729)
                                  ----------------------------------------------------------------
        Net Increase (Decrease) in Net Assets
         Resulting from Operations       36,569         58,472              24,443        (35,131)
                                  ----------------------------------------------------------------
DISTRIBUTIONS
    Net Investment Income               (36,570)       (58,475)            (49,810)      (101,053)
    Realized Capital Gain                    --             --                  --        (15,574)
                                  ----------------------------------------------------------------
        Total Distributions             (36,570)       (58,475)            (49,810)      (116,627)
                                  ----------------------------------------------------------------
CAPITAL SHARE TRANSACTIONS(1)
    Issued                            1,270,761      2,103,064             163,657        405,695
    Issued in Lieu of Cash
     Distributions                       33,927         53,903              33,532         82,424
    Redeemed                         (1,274,851)    (2,062,137)           (270,279)      (410,261)
                                  ----------------------------------------------------------------
        Net Increase (Decrease) from
         Capital Share Transactions      29,837         94,830             (73,090)        77,858
--------------------------------------------------------------------------------------------------
    Total Increase (Decrease)            29,836         94,827             (98,457)       (73,900)
--------------------------------------------------------------------------------------------------
NET ASSETS
    Beginning of Period               1,963,452      1,868,625           1,869,873      1,943,773
                                  ----------------------------------------------------------------
    End of Period                    $1,993,288     $1,963,452          $1,771,416     $1,869,873
==================================================================================================

(1)Shares Issued (Redeemed)
    Issued                            1,270,761      2,103,064              15,506         36,340
    Issued in Lieu of Cash
     Distributions                       33,927         53,903               3,175          7,416
    Redeemed                         (1,274,851)    (2,062,137)            (25,638)       (36,992)
                                  ----------------------------------------------------------------
        Net Increase (Decrease)
         in Shares Outstanding           29,837         94,830              (6,957)         6,764
==================================================================================================
</TABLE>

<PAGE>

24

FINANCIAL HIGHLIGHTS
This table  summarizes  each  fund's  investment  results and  distributions  to
shareholders on a per-share  basis. It also presents the fund's Total Return and
shows net  investment  income and expenses as percentages of average net assets.
These data will help you assess:  the  variability  of the fund's net income and
total returns from year to year;  the relative  contributions  of net income and
capital gains to the fund's total return; how much it costs to operate the fund;
and the extent to which the fund tends to distribute  capital  gains.  The table
also  shows the  Portfolio  Turnover  Rate,  a measure of  trading  activity.  A
turnover  rate of 100% means that the  average  security is held in the fund for
one year.  Money market  funds are not  required to report a Portfolio  Turnover
Rate.

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------
                                               PENNSYLVANIA TAX-EXEMPT MONEY MARKET FUND
                                                         YEAR ENDED NOVEMBER 30,
FOR A SHARE OUTSTANDING    SIX MONTHS ENDED   -------------------------------------------
THROUGHOUT EACH PERIOD         MAY 31, 2000     1999     1998     1997     1996     1995
-----------------------------------------------------------------------------------------
<S>                        <C>                <C>      <C>      <C>      <C>      <C>
NET ASSET VALUE,
 BEGINNING OF PERIOD                  $1.00    $1.00    $1.00    $1.00    $1.00    $1.00
-----------------------------------------------------------------------------------------
INVESTMENT OPERATIONS
    Net Investment Income              .018     .030     .033     .034     .033     .036
    Net Realized and Unrealized
     Gain (Loss) on Investments          --       --       --       --       --       --
                                    -----------------------------------------------------
        Total from Investment
         Operations                    .018     .030     .033     .034     .033     .036
                                    -----------------------------------------------------
DISTRIBUTIONS
    Dividends from Net
     Investment Income                (.018)   (.030)   (.033)   (.034)   (.033)   (.036)
    Distributions from Realized
     Capital Gains                       --       --       --       --       --       --
                                    -----------------------------------------------------
        Total Distributions           (.018)   (.030)   (.033)   (.034)   (.033)   (.036)
-----------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD        $1.00    $1.00    $1.00    $1.00    $1.00    $1.00
=========================================================================================

TOTAL RETURN                          1.85%    3.06%    3.33%    3.49%    3.36%    3.69%
=========================================================================================

RATIOS/SUPPLEMENTAL DATA
    Net Assets, End of Period
     (Millions)                      $1,993   $1,963   $1,869   $1,598   $1,371   $1,200
    Ratio of Total Expenses to
     Average Net Assets              0.18%*    0.19%    0.20%    0.20%    0.19%    0.20%
    Ratio of Net Investment Income
     to Average Net Assets           3.65%*    3.01%    3.27%    3.42%    3.30%    3.62%
=========================================================================================
*Annualized.
</TABLE>

<PAGE>

25

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------
                                          PENNSYLVANIA INSURED LONG-TERM TAX-EXEMPT FUND
                                                         YEAR ENDED NOVEMBER 30,
FOR A SHARE OUTSTANDING    SIX MONTHS ENDED  --------------------------------------------
THROUGHOUT EACH PERIOD         MAY 31, 2000     1999     1998     1997     1996     1995
-----------------------------------------------------------------------------------------
<S>                        <C>                <C>      <C>      <C>      <C>      <C>
NET ASSET VALUE,
 BEGINNING OF PERIOD                 $10.65   $11.51   $11.27   $11.26   $11.28   $10.07
-----------------------------------------------------------------------------------------
INVESTMENT OPERATIONS
    Net Investment Income              .294     .578     .597     .598     .606     .612
    Net Realized and Unrealized
     Gain (Loss) on Investments       (.150)   (.768)    .240     .074     .017    1.210
                                    -----------------------------------------------------
        Total from Investment
         Operations                    .144    (.190)    .837     .672     .623    1.822
                                    -----------------------------------------------------
DISTRIBUTIONS
    Dividends from Net Investment
     Income                           (.294)   (.578)   (.597)   (.598)   (.606)   (.612)
    Distributions from Realized
     Capital Gains                       --    (.092)      --    (.064)   (.037)      --
                                    -----------------------------------------------------
        Total Distributions           (.294)   (.670)   (.597)   (.662)   (.643)   (.612)
-----------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD       $10.50   $10.65   $11.51   $11.27   $11.26   $11.28
=========================================================================================

TOTAL RETURN                          1.37%   -1.74%    7.60%    6.21%    5.77%   18.48%
=========================================================================================

RATIOS/SUPPLEMENTAL DATA
    Net Assets, End of Period
     (Millions)                      $1,771   $1,870   $1,944   $1,746   $1,651   $1,569
    Ratio of Total Expenses to
     Average Net Assets              0.17%*    0.19%    0.20%    0.18%    0.19%    0.20%
    Ratio of Net Investment
     Income to Average Net Assets    5.50%*    5.20%    5.23%    5.37%    5.47%    5.63%
    Portfolio Turnover Rate             9%*      13%      19%       9%      13%      12%
=========================================================================================
*Annualized.
</TABLE>

<PAGE>

26

NOTES TO FINANCIAL STATEMENTS
Vanguard  Pennsylvania  Tax-Exempt  Funds comprise the  Pennsylvania  Tax-Exempt
Money Market and Pennsylvania  Insured Long-Term Tax-Exempt Funds, each of which
is registered under the Investment Company Act of 1940 as an open-end investment
company,  or mutual  fund.  Each fund invests in debt  instruments  of municipal
issuers whose ability to meet their  obligations may be affected by economic and
political developments in the Commonwealth of Pennsylvania.

A.  The following  significant accounting policies conform to generally accepted
accounting  principles  for mutual  funds.  The funds  consistently  follow such
policies in preparing their financial statements.
     1. Security Valuation:  Tax-Exempt Money Market Fund: Investment securities
are valued at amortized cost, which approximates market value. Insured Long-Term
Tax-Exempt Fund:  Bonds,  and temporary cash  investments  acquired more than 60
days to  maturity,  are valued  using the latest bid prices or using  valuations
based on a matrix  system  (which  considers  such  factors as security  prices,
yields,  maturities,  and  ratings),  both as furnished by  independent  pricing
services.  Other temporary cash  investments are valued at amortized cost, which
approximates  market  value.  Securities  for which  market  quotations  are not
readily  available  are valued by  methods  deemed by the board of  trustees  to
represent fair value.
     2. Federal  Income  Taxes:  Each  fund  intends to continue to qualify as a
regulated investment company and distribute all of its income.  Accordingly,  no
provision for federal income taxes is required in the financial statements.
     3. Futures  Contracts:  The  Insured  Long-Term  Tax-Exempt  Fund  may  use
Municipal  Bond Index,  U.S.  Treasury  Bond,  and U.S.  Treasury  Note  futures
contracts,  with the  objectives of enhancing  returns,  managing  interest rate
risk,   maintaining   liquidity,   diversifying   credit  risk,  and  minimizing
transaction  costs. The fund may purchase or sell futures  contracts  instead of
bonds to take advantage of pricing  differentials  between the futures contracts
and the  underlying  bonds.  The fund may also seek to take  advantage  of price
differences  among bond  market  sectors by  simultaneously  buying  futures (or
bonds) of one market  sector and selling  futures (or bonds) of another  sector.
Futures  contracts may also be used to simulate a fully invested position in the
underlying  bonds while  maintaining a cash balance for  liquidity.  The primary
risks  associated  with the use of futures  contracts are imperfect  correlation
between  changes  in market  values of bonds  held by the fund and the prices of
futures contracts, and the possibility of an illiquid market.
     Futures  contracts  are valued  based upon their  quoted  daily  settlement
prices. The aggregate principal amounts of the contracts are not recorded in the
financial statements. Fluctuations in the value of the contracts are recorded in
the  Statement  of Net Assets as an asset  (liability)  and in the  Statement of
Operations as  unrealized  appreciation  (depreciation)  until the contracts are
closed, when they are recorded as realized futures gains (losses).
     4. Distributions:  Distributions  from  net investment  income are declared
daily  and  paid  on the  first  business  day of the  following  month.  Annual
distributions  from  realized  capital  gains,  if  any,  are  recorded  on  the
ex-dividend date.
     5. Other:  Security  transactions  are accounted for on the date securities
are bought or sold. Costs used to determine  realized gains (losses) on the sale
of investment securities are those of the specific securities sold. Premiums and
original issue discounts are amortized and accreted,  respectively,  to interest
income over the lives of the respective securities.

B.  The  Vanguard  Group  furnishes  at  cost  investment  advisory,   corporate
management,  administrative,  marketing, and distribution services. The costs of
such services are allocated to each fund under methods  approved by the board of
trustees.  Each fund has  committed  to provide up to

<PAGE>

27

0.40% of its net assets in capital  contributions to Vanguard.  At May 31, 2000,
the funds had contributed capital to Vanguard (included in Other Assets) of:

--------------------------------------------------------------------------------
                              CAPITAL CONTRIBUTED  PERCENTAGE      PERCENTAGE
                                  TO VANGUARD       OF FUND       OF VANGUARD'S
PENNSYLVANIA TAX-EXEMPT FUND         (000)         NET ASSETS     CAPITALIZATION
--------------------------------------------------------------------------------
Money Market                         $374             0.02%            0.4%
Insured Long-Term                     348             0.02             0.3
--------------------------------------------------------------------------------

The funds' trustees and officers are also directors and officers of Vanguard.

C.  The funds' investment  adviser  may direct new issue  purchases,  subject to
obtaining  the best price and  execution,  to  underwriters  who have  agreed to
rebate or credit to the funds  part of the  underwriting  fees  generated.  Such
rebates  or  credits  are used  solely  to  reduce  the  funds'  management  and
administrative expenses. The funds' custodian bank has also agreed to reduce its
fees when the  funds  maintain  cash on  deposit  in their  non-interest-bearing
custody  accounts.  For the six months  ended May 31, 2000,  these  arrangements
reduced expenses by:

--------------------------------------------------------------------------------
                                                     EXPENSE REDUCTION
                                                           (000)
                                            ------------------------------------
                                             MANAGEMENT AND           CUSTODIAN
PENNSYLVANIA TAX-EXEMPT FUND                 ADMINISTRATIVE              FEES
--------------------------------------------------------------------------------
Money Market                                       --                    $11
Insured Long-Term                                 $35                     10
--------------------------------------------------------------------------------

D.  During the six months ended May 31, 2000, the Insured  Long-Term  Tax-Exempt
Fund purchased  $79,116,000 of investment  securities and sold  $121,399,000  of
investment securities, other than temporary cash investments.

E.  Capital gain distributions are determined on a tax basis and may differ from
realized  capital gains for financial  reporting  purposes due to differences in
the timing of realization of gains.  The Insured  Long-Term  Tax-Exempt Fund had
realized  losses  totaling  $3,592,000  through  November  30,  1999,  which are
deferred for tax purposes and increase the amount of net unrealized depreciation
on  investment  securities  for tax purposes (see Note F). At November 30, 1999,
the fund had available capital losses of $2,424,000 to offset future net capital
gains through November 30, 2007.

F.  At May 31, 2000, net unrealized depreciation of Insured Long-Term Tax-Exempt
Fund  investment  securities  for federal  income tax purposes was  $35,503,000,
consisting of unrealized  gains of $26,438,000  on securities  that had risen in
value since their purchase and  $61,941,000  in unrealized  losses on securities
that had fallen in value since their purchase. (See Note E.)

<PAGE>

28

NOTES TO FINANCIAL STATEMENTS (continued)

     At May 31, 2000, the aggregate  settlement value of open futures  contracts
expiring   in   September   2000  and  the   related   unrealized   appreciation
(depreciation) were:

--------------------------------------------------------------------------------
                                                               (000)
                                                     ---------------------------
PENNSYLVANIA                                          AGGREGATE    UNREALIZED
TAX-EXEMPT FUND/                    NUMBER OF LONG    SETTLEMENT  APPRECIATION
FUTURES CONTRACTS                 (SHORT) CONTRACTS     VALUE    (DEPRECIATION)
--------------------------------------------------------------------------------
Insured Long-Term/
 U.S. Treasury Bond                      (175)         $16,734       $(322)
 U.S. Treasury Note                       290           28,067         271
--------------------------------------------------------------------------------

<PAGE>


--------------------------------------------------------------------------------
THE PEOPLE WHO GOVERN YOUR FUND

The  Trustees of your mutual fund are there to see that the fund is operated and
managed in your best interests  since,  as a shareholder,  you are part owner of
the fund.  Your  fund  Trustees  also  serve on the  Board of  Directors  of The
Vanguard  Group,  which is owned by the  funds  and  exists  solely  to  provide
services to them on an at-cost basis.
     The majority of Vanguard's board members are independent, meaning that they
have no  affiliation  with  Vanguard or the funds they  oversee,  apart from the
sizable personal investments they have made as private  individuals.  They bring
distinguished  backgrounds  in business,  academia,  and public service to their
task of working with Vanguard officers to establish the policies and oversee the
activities of the funds.
     Among board members' responsibilities are selecting investment advisers for
the  funds;  monitoring  fund  operations,  performance,  and  costs;  reviewing
contracts;  nominating  and  selecting  new  Trustees/Directors;   and  electing
Vanguard officers.
     The list below provides a brief description of each Trustee's  professional
affiliations.  Noted in  parentheses is the year in which the Trustee joined the
Vanguard Board.


TRUSTEES

JOHN J. BRENNAN  (1987)  Chairman of the Board,  Chief  Executive  Officer,  and
Director/Trustee  of The  Vanguard  Group,  Inc.,  and  each  of the  investment
companies in The Vanguard Group.

JOANN HEFFERNAN HEISEN (1998) Vice President,  Chief Information  Officer, and a
member of the  Executive  Committee of Johnson & Johnson;  Director of Johnson &
JohnsonoMerck Consumer Pharmaceuticals Co., The Medical Center at Princeton, and
Women's Research and Education Institute.

BURTON G. MALKIEL  (1977)  Chemical  Bank  Chairman's  Professor  of  Economics,
Princeton  University;  Director of Prudential  Insurance Co. of America,  Banco
Bilbao Gestinova,  Baker Fentress & Co., The Jeffrey Co., and Select Sector SPDR
Trust.

ALFRED M. RANKIN, JR. (1993) Chairman,  President,  Chief Executive Officer, and
Director of NACCO Industries, Inc.; Director of The BFGoodrich Co.

JAMES O. WELCH,  JR. (1971) Retired  Chairman of Nabisco Brands,  Inc.;  retired
Vice Chairman and Director of RJR Nabisco;  Director of TECO Energy,  Inc.,  and
Kmart Corp.

J.  LAWRENCE  WILSON  (1985)  Retired  Chairman of Rohm & Haas Co.;  Director of
AmeriSource Health Corporation,  Cummins Engine Co., and The Mead Corp.; Trustee
of Vanderbilt University.
--------------------------------------------------------------------------------


OTHER FUND OFFICERS

RAYMOND J. KLAPINSKY Secretary;  Managing Director and Secretary of The Vanguard
Group,  Inc.;  Secretary  of each of the  investment  companies  in The Vanguard
Group.

THOMAS J. HIGGINS Treasurer; Principal of The Vanguard Group, Inc.; Treasurer of
each of the investment companies in The Vanguard Group.


VANGUARD MANAGING DIRECTORS

R. GREGORY BARTON - Legal Department.
ROBERT A. DISTEFANO - Information Technology.
JAMES H. GATELY - Individual Investor Group.
KATHLEEN C. GUBANICH - Human Resources.
IAN A. MACKINNON - Fixed Income Group.
F. WILLIAM MCNABB, III - Institutional Investor Group.
MICHAEL S. MILLER - Planning and Development.
RALPH K. PACKARD - Chief Financial Officer.
GEORGE U. SAUTER - Quantitative Equity Group.

<PAGE>

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