VANGUARD PENNSYLVANIA TAX FREE FUND
N-30D, 1994-07-26
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<PAGE>   1



CHAIRMAN'S LETTER

FELLOW SHAREHOLDER:

The six months ended May 31, the first half of the 1994 fiscal year for the
eleven Portfolios of the Vanguard State Tax-Free Fund, witnessed something that
we have not seen much of since 1987: rising interest rates. As a result, the
prices of long-term municipal bonds declined during the period, while the
income from money market instruments received a nice boost.  This environment,
of course, negatively impacted the net asset values of each of our Insured
Long-Term Portfolios, as reflected in the table on page 2. (The net asset
values of our Money Market Portfolios, as you would expect, remained constant,
at $1.00 per share.) While fluctuating asset values are part and parcel of bond
investing, our Long-Term Portfolios exceeded the total returns (capital change
plus income) achieved by competitive state tax-free bond funds. What is more,
all of our Portfolios remain virtually peerless in the mutual fund field with
respect to their investment quality, as shown in the third column of the table
on page 2. In summary form, here are the Portfolio highlights over the past
twelve months:

*        THE STATE MONEY MARKET PORTFOLIOS--provided total returns ranging from
         +2.2% to +2.3% . . . current yields are in the area of 2.6%, about the
         same as they were twelve months ago but nicely above their level at
         the outset of the fiscal half year .  . . net asset values remained at
         $1.00 per share.

*        THE STATE INSURED LONG-TERM PORTFOLIOS--reflecting the rebound in
         interest rates, turned in modest total returns ranging from +1.9% to
         +3.3% . . . current income yields are running about 5.4%, some 40
         basis points (0.40%) higher than they were twelve months ago.

         The detailed results for each of our State Tax-Free
Portfolios--including per share net asset values, dividends, and capital gains
distributions, as well as current yields--are presented on the following page.
To provide some perspective on how our Insured Long-Term Portfolios fared in
the face of rising interest rates, the table that follows summarizes the income
returns and the capital returns for each Portfolio:

<TABLE>
<CAPTION>
                                                                                               
- - -----------------------------------------------------------------------------------------------
                                                                 Investment Returns
                                                                 Twelve Months Ended
                                                                        May 31, 1994           
Insured Long-Term                                     -----------------------------------------
Portfolio*                                            Income           Capital          Total  
- - -----------------------------------------------------------------------------------------------
<S>                                                    <C>              <C>                <C>
CALIFORNIA                                             +5.4%            -3.5%              +1.9%
NEW YORK                                               +5.4             -3.2               +2.2
PENNSYLVANIA                                           +5.6             -2.3               +3.3
NEW JERSEY                                             +5.3             -3.4               +1.9
OHIO                                                   +5.2             -2.8               +2.4
FLORIDA                                                +5.1             -2.2               +2.9
- - -----------------------------------------------------------------------------------------------
</TABLE>

*        On March 4, 1994, the California Insured Intermediate-Term Portfolio
         was introduced. Since its inception, the Portfolio has achieved an
         income return of +1.0%, a capital return of +0.4%, and a total return
         of +1.4%.

* FIXED-INCOME MARKET REVIEW
The basic benchmark for the bond market is the long-term U.S. Treasury bond.
During the past six months, its yield rose from 6.3% at the start of the period
to 7.4% at its conclusion. This yield change engendered a decline of about -13%
in the Treasury bond's price. I am happy to report that the tax-exempt bond
market fared a good bit better, with the yield on long-term high-grade
municipal bonds rising from 5.5% to 6.1%, resulting in a price decline of some
- - -8%. However painful this decline may be for investors in long-term bonds, it
is worth noting that interest rates had been dropping steadily for some seven
years, and the retracement during the past six months has merely returned rates
to the level prevailing at the end of 1992.

         A primary cause of the interest rate rise was investor fears about a
resurgence of inflation. So far, at least, there is little evidence of it. The
U.S. Consumer Price Index has risen just 2.3% over the past twelve months,
although more sensitive indicators--such as commodity prices--have been rising
at a much higher rate. In an effort to quell these inflationary fears, the
Federal reserve acted to "tighten" the money supply and slow economic growth
and potential future inflation, raising the





                                       1
<PAGE>   2
Federal funds rate (at which banks borrow from one another) four times--in
February, March, April, and again in May--from 3.00% to 4.25%.

         These increases in short-term rates are often seen by market
participants as a restraint on potential inflation, and thus cause long-term
rates to fall. This time around, quite the reverse has been true. In any event,
proving that "it is an ill wind (indeed) that blows no good," the rate increase
has added to the income received by investors in our Money Market Portfolios.
And, because of the "lag" from the date interest rates rise until they are
fully manifested in money market fund yields, further dividend increases in our
Money Market Portfolios likely lie in prospect.

* IN SUMMARY
In my Chairman's letter to you one year ago, I noted that "it is hard to
imagine that the steady trend toward ever-lower interest rates can go much
further." I went on to caution that if rates did reverse their decline in
response to a strengthening economy, the capital rewards enjoyed by our
longer-term Portfolios would turn to capital penalties. While I do not presume
any forecasting ability whatsoever, these observations have proved prescient.
Nonetheless, provided that you own the Vanguard Portfolio (or combination of
Portfolios) that meets your long-term risk-reward objectives, I would urge you
to "stay the course" and avoid the temptation to make precipitate changes in
your fund holdings.

         I look forward to reporting on our results for the full 1994 fiscal
year six months hence.

Sincerely,

/s/ JOHN C. BOGLE
- - -----------------
John C. Bogle
Chairman of the Board

June 17, 1994


<TABLE>
<CAPTION>
                                                                  Net Asset Value
                                 Total                               Per Share           Dividends         Total Return  
                            Net Assets                         --------------------  -----------------   ----------------
                            (millions)     Average    Average   Nov. 30,    May 31,      Six    Twelve      Six    Twelve   Current
Portfolio                 May 31, 1994    Maturity   Quality*     1993       1994       Months  Months     Months  Months   Yield**
- - -----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>        <C>          <C>      <C>        <C>      <C>         <C>       <C>       <C>       <C>
MONEY MARKET
  CALIFORNIA  . . . . . . . .   $1,126     35 DAYS      MIG 1    $  1.00    $  1.00    $.011     $.023     +1.1%     +2.3%     2.55%
  PENNSYLVANIA  . . . . . . .    1,041     37 DAYS      MIG 1       1.00       1.00     .011      .023     +1.1      +2.3      2.60
  NEW JERSEY  . . . . . . . .      803     41 DAYS      MIG 1       1.00       1.00     .011      .022     +1.1      +2.2      2.46
  OHIO  . . . . . . . . . . .      139     47 DAYS      MIG 1       1.00       1.00     .011      .023     +1.2      +2.3      2.57
- - -----------------------------------------------------------------------------------------------------------------------------------
INSURED LONG-TERM
  CALIFORNIA  . . . . . . . .   $  929  12.9 YEARS        Aaa     $11.30     $10.66   $ .451+    $.753+    -1.8%     +1.9%     5.58%
  CALIFORNIA INTERMEDIATE-
   TERM . . . . . . . . . . .       57   5.3 YEARS        Aaa         --      10.04     .101++      --     +1.4++      --      4.82
  NEW YORK  . . . . . . . . .      760  11.8 YEARS        Aaa      10.97      10.49     .306+     .602+    -1.6      +2.2      5.41
  PENNSYLVANIA  . . . . . . .    1,430  11.7 YEARS        Aaa      11.36      10.85     .388+     .703+    -1.1      +3.3      5.47
  NEW JERSEY  . . . . . . . .      700  11.5 YEARS        Aaa      11.77      11.18     .374+     .690+    -1.9      +1.9      5.41
  OHIO  . . . . . . . . . . .      162   9.7 YEARS        Aaa      11.61      11.08     .327+     .630+    -1.8      +2.4      5.48
  FLORIDA . . . . . . . . . .      292  12.1 YEARS        Aaa      10.86      10.38     .339+     .611+    -1.3      +2.9      5.39
- - -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

 *   MIG 1 and Aaa are Moody's highest ratings for, respectively,
     short-term and long-term municipal bonds.
**   Money Market Portfolios' yields are 7-day annualized yields; others
     are 30-day SEC yields.
 +   Include capital gains distributions of $.152 for California, $.012 for
     New York, $.079 for Pennsylvania, $.063 for New Jersey, $.032 for
     Ohio, and $.070 for Florida.
++   Since inception, March 4, 1994.
     The shares of each of the Vanguard "single state" Portfolios are
     available for purchase solely by residents of the designated states.
     
     



                                       2
<PAGE>   3
AVERAGE ANNUAL TOTAL RETURNS

THE CURRENT YIELDS NOTED IN THE CHAIRMAN'S LETTER ARE CALCULATED IN ACCORDANCE
WITH SEC GUIDELINES. THE AVERAGE ANNUAL TOTAL RETURNS FOR THE PORTFOLIOS
(PERIODS ENDED MARCH 31, 1994) ARE AS FOLLOWS:

<TABLE>
<CAPTION>
                                                  INCEPTION                                         SINCE
PORTFOLIO                                           DATE            1 YEAR        5 YEARS         INCEPTION
- - -----------------------------------------           ----            ------        -------         ---------
<S>                                                <C>              <C>            <C>             <C>
CALIFORNIA INSURED LONG-TERM                        4/7/86          +1.77%         +8.56%          +7.70%
CALIFORNIA INSURED INTERMEDIATE-TERM                3/4/94             --             --           -0.64
CALIFORNIA MONEY MARKET                             6/1/87          +2.34          +4.05           +4.34
NEW YORK INSURED TAX-FREE                           4/7/86          +2.37          +8.97           +7.23
PENNSYLVANIA INSURED LONG-TERM                      4/7/86          +3.14          +9.22           +8.11
PENNSYLVANIA MONEY MARKET                          6/13/88          +2.31          +4.15           +4.39
NEW JERSEY INSURED LONG-TERM                        2/3/88          +2.44          +8.87           +8.65
NEW JERSEY MONEY MARKET                             2/3/88          +2.24          +4.12           +4.37
OHIO INSURED LONG-TERM                             6/18/90          +2.70             --           +9.12
OHIO MONEY MARKET                                  6/18/90          +2.31             --           +3.54
FLORIDA INSURED TAX-FREE                            9/1/92          +2.56             --           +7.01
</TABLE>

THESE DATA REPRESENT PAST PERFORMANCE. THE INVESTMENT RETURN AND PRINCIPAL
VALUE OF AN INVESTMENT WILL FLUCTUATE SO THAT AN INVESTOR'S SHARES, WHEN
REDEEMED, MAY BE WORTH MORE OR LESS THAN THEIR ORIGINAL COST.

PLEASE NOTE THAT AN INVESTMENT IN A MONEY MARKET FUND, SUCH AS A MONEY MARKET
PORTFOLIO OF THE VANGUARD STATE TAX-FREE FUNDS, IS NEITHER INSURED NOR
GUARANTEED BY THE U.S. GOVERNMENT, AND THERE IS NO ASSURANCE THAT THE FUND WILL
BE ABLE TO MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.





                                       3
<PAGE>   4
REPORT FROM THE INVESTMENT ADVISER

STATE INSURED
LONG-TERM PORTFOLIOS

Over the past six months, the pace of domestic economic activity accelerated
sharply. Strong improvements in the rate of growth in Gross Domestic Product
(GDP), and a host of related statistics such as home sales, automobile sales,
and consumer confidence, provided ample evidence of renewed vigor. Bond markets
seldom react well to strong economic signals and this period was no exception.
The yield on the 30-year Treasury bond rose 1.1 percentage points (from 6.3% to
7.4%). During the same period, municipal bonds performed slightly better, with
the yield on long-term high-grades rising 0.6% (from 5.5% to 6.1%), producing
an 8.3% loss of value.

         As one would expect, the sharp rise in interest rates negatively
impacted the share price of the State Insured Long-Term Portfolios. To be sure,
a decline of this nature can be disconcerting to even the most resolute
long-term investor. However, following more than a decade of exceptional
returns of longer-term fixed-income assets, the poor six-month period
represents only a partial "give back" of previous prosperity. Looking beyond
the short-term share price volatility, a shareholder of the State Insured
Long-Term Portfolios can expect to receive an attractive, consistent, and
durable stream of tax-exempt dividend income.

*        SUCCESSFUL STRATEGIES . . .
For the recent period, two of several core strategies stand out for enhancing
the relative returns of the State Insured Long-Term Portfolios. First, a
reduction in average maturity over the past year improved relative market
performance and moderated some of the "sting" of a bear market. Some of this
was accomplished by focusing on municipals maturing in 15 to 20 years, rather
than the slightly higher yielding but more volatile 30-year maturities. This
modest reduction in average maturity effectively "locked-in" a portion of the
gains in share price achieved in the previous bull market.

         Second, the prudent maintenance of reserve positions of about 10% of 
fund assets added to our relative stability. What is more, these reserves 
provided a liquidity cushion to meet shareholder redemptions. In good times,
reserves (which normally yield less than longer-term assets) forego a small
amount of yield potential. In difficult market conditions, such as prevailed 
during the past six months, the additional reserves allow the portfolio to
meet redemption requests without the inopportune (and sometimes "distressed")
sale of securities.

*        LOOKING FORWARD . . .
The issuance of new municipal bonds has fallen dramatically. Issuance for the
first six months in fiscal 1994 was 26% below the pace of a year earlier. Early
indications show forward supply even lower compared to the "mad dash" of 1993.
Municipalities appear to have completed the process of refinancing older,
higher coupon debt of the 1980's and early 1990's. At the same time, a record
number of previously mentioned high coupon bonds are approaching their call
dates, and a huge amount of principal will be returned to owners of individual
bonds. All things being equal, this should continue to provide more attractive
returns for municipal bonds than their taxable brethren.

         In conclusion, it would be reassuring to believe that the recent
increase in interest rates is sufficient to "rein in" the rapidly expanding
U.S. economy and dampen any inflationary expectations. Yet, that observation
might be premature. If history serves as any guide, the process may take longer
than the recent six months of "pain." If so, there could be more share price
unpleasantness ahead before the markets resume their positive return pattern of
the past decade. However, attempting to "time" the turnaround--getting out at
the highs and then getting back in at the lows--tends to be equally futile for
the institutional and individual investor alike. The best advice we know is to
endure the swings and allow the powerful tax exempt compounding of interest to
continue.





                                       4
<PAGE>   5
STATE MONEY MARKET PORTFOLIOS

The past six months ushered in a change in the Federal Reserve Board's
previously accommodative monetary policy. Since February 4, 1994, market
participants watched anxiously as the Federal Reserve Board, in four separate
instances, pushed the Federal funds rate up 125 basis points (1.25%) to 4.25%
and tightened the discount rate 50 basis points (0.50%) to 3.50%. This series
of moves by the Fed has signaled the end of stimulative policy (maintained
throughout 1993) and the initiation of a policy of "neutrality."

         The effect of the tightening on the short-term municipal market was
surprisingly mild. While yields on "first tier" taxable money market funds rose
approximately 70 basis points over the six-month period, yields on
state-specific and general purpose tax- free money funds rose a mere 35 basis
points. The primary contributor to the unresponsive municipal market was the
scarcity of new issue supply. Supply of short-term municipal securities is
quite cyclical, and depends on an issuer's fiscal year, which generally runs
from July 1 to June 30. As a result, supply typically remains light in the
months leading up to June and dramatically increases in the summer months, as
issuers prepare to fund their upcoming budgetary needs in the new fiscal year.
This lack of supply experienced during a period of rising rates in the broader
taxable markets enabled short-term municipal yields to maintain relative
stability. As technical supply factors temporarily have been depressing yields
on short-term municipal securities, we have been targeting a low average
weighted maturity for the tax-exempt money funds of 45 to 60 days. Our
Portfolios should be commensurately more responsive when new issue supply
surges and interest rates rise. We expect the shift from scarcity to abundance
will occur within weeks.

         While the market focused on an accelerating economy and the rise in
interest rates, the Securities and Exchange Commission quietly launched its own
initiative to ensure the net asset value safety of tax-exempt money funds,
consistent with those already applicable to taxable money funds. In fact, the
SEC has proposed regulations that coincide with (or in some cases are less
restrictive than) our conservative approach to managing money market funds.
Thus, they will have little impact on the Vanguard Money Market Portfolios. We
believe that the Commission's proposals, if adopted, will be a positive force
in elevating industrywide portfolio standards.

         In conclusion, the upcoming months could potentially bring about
significant regulatory and economic changes in our market.  While keeping a
watchful eye on the actions of the Federal Reserve Board and maintaining our
conservative investment approach, we look forward to capitalizing on any
opportunities that may result.

Sincerely,

Ian A. MacKinnon
Senior Vice President

Jerome J. Jacobs
Vice President

Pamela E. Wisehaupt
Vice President

David E. Hamlin
Assistant Vice President

Reid O. Smith
Assistant Vice President

Danine A. Mueller
Portfolio Manager

Vanguard Fixed Income Group

June 13, 1994





                                       5
<PAGE>   6
STATEMENT OF NET ASSETS                         FINANCIAL STATEMENTS (unaudited)
                                                                    May 31, 1994

<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
INSURED LONG-TERM PORTFOLIO                      (000)          (000)+
- - ----------------------------------------------------------------------
<S>                                           <C>            <C>
MUNICIPAL BONDS (98.4%)                                               
- - ----------------------------------------------------------------------
ISSUER INSURED (90.2%)
    Allegheny County GO
        0.00%, 5/1/03 (2)                      $12,315        $  7,480
        6.00%, 5/1/10 (2)                        3,030           3,039
        6.00%, 5/1/12 (2)                        3,000           2,997
    Allegheny County Hosp.
        Development Auth. (Children's Hosp.
        Pittsburgh) VRDO 2.75%, 7/1/94 (1)       2,300           2,300
        (Magee Women's Hosp.)
        6.00%, 10/1/10 (3)                       4,235           4,248
        (Mercy Hosp.)
        6.75%, 4/1/21 (2)                        4,500           4,647
        (Presbyterian Univ. Hosp.)
        7.60%, 3/1/08 (1)                        5,000           5,555
        6.00%, 11/1/12 (1)                       3,000           2,973
        7.125%, 7/1/19 (1)                       6,835           7,431
    Allegheny County Sanitation Auth.
        6.50%, 12/1/11 (3)                       8,000           8,219
        5.50%, 12/1/13 (3)                      20,295          18,983
        6.25%, 12/1/14 (1)                       9,660           9,668
        5.50%, 12/1/16 (3)                      23,665          21,723
    Beaver County Industrial
        Development Auth.
        (Ohio Edison)
        7.10%, 6/1/18 (3)                        5,000           5,377
        7.00%, 6/1/21 (3)                       22,715          24,148
    Berks County GO
        5.60%, 11/15/08 (3)                      2,900           2,838
        5.75%, 11/15/12 (3)                     15,500          15,003
        0.00%, 11/15/13 (3)                      7,250           2,096
        0.00%, 11/15/14 (3)                      8,615           2,323
        0.00%, 11/15/15 (3)                      6,250           1,584
    Berks County Hosp. Rev.
        (Reading Hosp.)
        5.70%, 10/1/14 (1)                       4,500           4,296
    Bethlehem Water Rev.
        6.00%, 11/15/12 (1)                      6,000           6,350
        6.25%, 11/15/21 (1)                     10,775          11,528
    Blair County Hosp. Auth.
        (Altoona Hosp.)
        6.50%, 7/1/22 (2)                        8,500           8,650
    Boyertown Area School Dist.
        6.10%, 3/1/15 (2)                        6,000           5,978
    Bucks County Water & Sewer Auth.
        9.10%, 12/1/95 (3) (Prere.)              1,200           1,288
        9.20%, 12/1/95 (3) (Prere.)              1,200           1,290
    Butler County GO
        6.00%, 7/15/12 (3)                       5,185           5,179
    Center Township Sewer Auth.
        5.50%, 4/15/11 (2)                       2,375           2,269
    Central Dauphin County
        School Dist. GO
        0.00%, 6/1/04 (2)                        4,800           2,718
    Central Greene School Dist.                               
        6.50%, 2/15/24 (1)                       5,500           5,594
    Chester County Hosp. Auth.
        (Chester County Hosp.)
        7.00%, 7/1/16 (1)                       13,500          14,078
    Coatesville Area School Dist.
        7.25%, 5/1/00 (2) (Prere.)               2,200           2,458
    Corry Area School Dist. GO
        5.50%, 12/15/10 (1)                      4,600           4,398
    Dauphin County General Auth.
        (West Pennsylvania Hosp.)
        5.50%, 7/1/13 (1)                        5,000           4,675
    Dauphin County Hosp. Auth.
        (Harrisburg Hosp.)
        8.125%, 7/1/07 (1)                       3,000           3,336
    Delaware County Auth.
        College Rev.
        (Haverford College)
        5.40%, 11/15/13 (1)                      1,750           1,595
    Delaware County Hosp. Auth.
        (Crozer Chester Medical Center)
        5.30%, 12/15/11 (1)                      4,660           4,276
        5.30%, 12/15/20 (1)                      3,325           2,895
        (Delaware County
        Memorial Hosp.)
        7.125%, 8/15/09 (1)                      5,160           5,573
        7.20%, 8/15/19 (1)                       8,000           8,667
    Delaware River Joint Toll
        Bridge Comm.
        6.00%, 7/1/18 (3)                        3,040           3,013
    Delaware River Port Auth.
        7.375%, 1/1/07 (2)                      13,500          14,821
        6.50%, 1/1/09 (2)                        4,500           4,609
    Erie County GO
        5.25%, 9/1/12 (3)                        2,875           2,620
    Erie County Hosp. Auth.
        (St. Vincent Health Care)
        6.125%, 7/1/13 (1)                       3,900           3,924
    Erie County Prison Auth.
        Commonwealth Lease
        6.25%, 11/1/01 (1)                      25,140          26,953
    Fort LeBoeuf School Dist. GO
        5.80%, 1/1/13 (1)                        5,500           5,330
    Garnet Valley School Dist. GO
        5.70%, 4/1/11 (2)                        3,000           2,924
    Governor Mifflin School Dist. GO
        6.50%, 2/1/02 (2) (Prere.)               7,330           7,916
    Greensburg Salem School Dist.
        6.45%, 9/15/18 (1)                       7,500           7,634
</TABLE>





                                       6
<PAGE>   7


<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
                                                 (000)          (000)+
- - ----------------------------------------------------------------------
    <S>                                       <C>            <C>
    Hampden Township Water &
        Sewer Auth.
        8.875%, 10/1/05 (1)                   $    500       $     530
        9.00%, 4/1/11 (1)                          500             531
    Harrisburg Water Auth.
        5.70%, 7/15/08 (3)                       3,930           3,881
    Hempfield School Dist. GO
        6.00%, 8/15/09 (3)                       6,000           6,317
    Lancaster Higher Education Auth.
        (Franklin & Marshall College)
        6.60%, 4/15/10 (1)                       4,940           5,145
        6.70%, 4/15/12 (1)                       4,000           4,189
    Lehigh County GO
        7.25%, 1/1/98 (3) (Prere.)               3,000           3,287
        6.00%, 10/15/99 (2) (Prere.)             2,000           2,093
        7.00%, 7/1/16 (1)                        4,415           4,998
    Lewisburg Area School Dist.
        6.20%, 6/1/12 (1)                        3,500           3,535
        6.25%, 6/1/15 (1)                        3,685           3,720
    Ligonier Valley School Dist.
        6.00%, 3/1/19 (1)                        6,000           5,893
    Lycoming County College Auth.
        (Pennsylvania Institute of
         Technology)
        5.40%, 11/1/08 (2)                       6,000           5,796
    Lycoming County Hosp. Auth.
        (Williamsport Hosp.)
        6.875%, 11/1/04 (2)                      4,450           4,737
        7.00%, 11/1/15 (2)                       5,000           5,333
    Manheim Central School Dist. GO
        6.85%, 3/1/08 (3)                        2,705           2,863
    Meadville Area Water Auth.
        6.00%, 7/1/22 (4)                        3,750           3,961
    Monroe County Hosp. Auth.
        (Pocono Hosp.)
        7.00%, 7/1/15 (2)                        3,700           3,924
    Montgomery County Higher
        Education & Health Auth.
        (Abington Memorial Hosp.)
        6.10%, 6/1/12 (2)                        5,000           5,016
        6.00%, 6/1/22 (2)                       10,160           9,800
    Montgomery County Industrial
        Development Auth. PCR
        (Philadelphia Electric Co.)
        6.70%, 12/1/21 (1)                      10,000          10,333
    Mount Lebanon Hosp.
        Development Auth.
        (St. Clair Memorial Hosp.)
        6.25%, 7/1/06 (3)                        9,250           9,640
    Neshaminy School Dist. GO
        6.30%, 2/15/13 (3)                      10,000          10,146
    North Penn Water Auth.
        6.125%, 11/1/10 (3)                      5,140           5,196
    North Wales Water Auth.                                   
        6.00%, 11/1/10 (3)                       2,400           2,414
        6.125%, 11/1/12 (3)                      3,000           3,030
        6.125%, 11/1/22 (3)                      8,300           8,283
    Northampton County Higher
        Education Auth.
        (Lehigh Univ.)
        7.10%, 11/15/09 (1)                      7,035           7,706
    Northampton County Hosp. Auth.
        (Easton Hosp.)
        6.25%, 1/1/19 (1)                       10,000           9,999
        7.875%, 1/1/19 (6)                         285             319
    Northumberland County
        Commonwealth Lease
        6.25%, 10/15/01 (1) (Prere.)            13,600          14,593
    Penn Hills GO
        5.80%, 12/1/13 (2)                      11,735          11,415
    Pennsylvania Convention
        Center Auth.
        6.25%, 9/1/95 (3)                        3,000           3,087
        0.00%, 9/1/04 (3)                        5,000           2,810
        6.70%, 9/1/16 (3)                       19,150          21,032
        6.00%, 9/1/19 (3)                       12,600          12,501
    Pennsylvania GO
        5.00%, 4/15/09 (2)                       9,985           9,149
    Pennsylvania Higher Education Auth.
        (Bryn Mawr College)
        6.50%, 12/1/09 (3)                       2,930           3,046
        (College and Univ. Rev.)
        7.20%, 1/1/04 (2)                        2,500           2,574
        (Drexel Univ.)
        5.625%, 5/1/14 (1)                      11,755          11,083
        (State System)
        4.00%, 6/15/95 (2)                       1,250           1,252
        5.375%, 6/15/18 (2)                      8,845           7,929
        (Temple Univ.)
        6.50%, 4/1/21 (1)                        6,000           6,133
        5.75%, 4/1/31 (1)                       22,580          20,583
    Pennsylvania Intergovernmental
        Cooperation Auth.
        5.00%, 6/15/22 (1)                      39,850          33,297
        5.625%, 6/15/23 (1)                     17,625          16,179
    Pennsylvania Turnpike Comm.
        5.80%, 12/1/07 (3)                       7,500           7,500
        6.25%, 6/1/11 (2)                       10,000          10,193
        5.75%, 12/1/12 (2)                      10,000           9,636
        6.00%, 6/1/15 (1)                       28,800          28,428
        5.50%, 12/1/17 (3)                      29,000          26,472
        6.00%, 12/1/19 (2)                       7,450           7,354
</TABLE>





                                       7
<PAGE>   8
STATEMENT OF NET ASSETS (continued)


<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
                                                 (000)          (000)+
- - ----------------------------------------------------------------------
    <S>                                      <C>             <C>
    Philadelphia Airport Rev.
        9.875%, 6/15/06 (1)                  $   2,215        $  2,277
    Philadelphia Gas Works
        6.75%, 1/1/99 (2)                        3,570           3,889
        7.25%, 1/1/99 (2)                        2,625           2,907
        7.25%, 1/1/10 (2)                       10,075          10,878
        6.00%, 5/15/12 (2)                      14,250          14,249
        6.75%, 1/1/15 (2)                       13,930          14,490
    Philadelphia GO TOB VRDO
        2.95%, 11/15/94 (3)                     15,000          15,000
    Philadelphia Municipal Auth. Rev.
        7.10%, 11/15/05 (1)                      3,000           3,332
        5.55%, 11/15/08 (3)                      3,040           2,990
        5.60%, 11/15/09 (3)                      2,100           2,051
        5.60%, 11/15/10 (3)                      6,755           6,550
        5.625%, 11/15/18 (3)                     8,750           8,131
    Philadelphia Parking
        Auth. Rev.
        7.375%, 9/1/18 (2)                      12,065          13,160
    Philadelphia School Dist. GO
        4.25%, 7/1/95 (2)                        5,380           5,383
        0.00%, 7/1/01 (2)                       11,750           8,012
        5.30%, 7/1/04 (2)                        3,500           3,446
        5.375%, 7/1/05 (2)                       7,500           7,362
        5.85%, 7/1/09 (1)                        1,500           1,494
    Philadelphia Water & Sewer
        Auth. Rev.
        5.50%, 6/15/07 (1)                       1,000             986
        7.00%, 6/15/10 (3)                      33,865          37,618
        7.00%, 6/15/11 (3)                      35,685          39,621
    Pittsburgh GO
        7.00%, 3/1/06 (3)                       18,265          19,539
        5.20%, 9/1/06 (2)                        1,175           1,137
        7.00%, 3/1/07 (3)                        2,135           2,284
        5.30%, 9/1/07 (2)                        1,000             966
        6.00%, 3/1/14 (2)                        3,515           3,447
        5.50%, 9/1/14 (2)                        9,500           8,862
        6.25%, 9/1/16 (1)                       11,030          11,121
    Pittsburgh Public Parking Auth.
        5.875%, 12/1/12 (3)                      8,200           8,050
    Pittsburgh School Dist.
        6.75%, 8/1/01 (2) (Prere.)               3,250           3,562
    Pittsburgh Water & Sewer System
        7.625%, 9/1/04 (3) (ETM)                 5,370           6,302
        6.50%, 9/1/13 (3)                       22,000          23,504
        7.25%, 9/1/14 (3) (ETM)                 25,175          29,324
    Pocono Mountain School Dist. GO
        5.75%, 10/1/09 (2)                       6,000           5,921
    Reading GO
        5.875%, 11/15/12 (2)                    18,000          17,711
        6.00%, 11/15/22 (2)                      6,000           5,895
    Rose Tree Media School Dist.
        5.50%, 2/15/14 (3)                       3,000           2,787
    St. Mary's Hosp. Auth.
        (Franciscan Health System)
        7.00%, 7/1/09 (6)                        1,000           1,073
        7.00%, 7/1/13 (6)                        5,050           5,419
        7.00%, 7/1/14 (6)                        4,000           4,292
        9.40%, 7/1/14 (6)                        2,125           2,295
        7.00%, 6/15/15 (6)                       1,770           1,899
    Sayre Health Care Facilities Auth.
        Pooled Loan VRDO 2.90%, 6/1/94 (2)      24,695          24,695
        (Guthrie Health Care System)
        7.00%, 3/1/11 (2)                        2,000           2,134
        6.00%, 3/1/21 (2)                       10,710          10,444
    Seneca Valley School Dist. GO
        5.75%, 7/1/10 (3)                        6,000           5,922
        5.50%, 7/1/14 (3)                        9,965           9,250
    Souderton Area School Dist.
        7.00%, 9/1/12 (2)                        2,200           2,369
    South Fork Hosp. Auth.
        (Conemaugh Valley Hosp.)
        5.625%, 7/1/10 (7)                       2,300           2,202
        5.75%, 7/1/18 (7)                        7,000           6,453
    Spring-Ford Area School Dist. GO
        6.50%, 2/1/18 (2)                       10,760          11,059
    Univ. of Pittsburgh
        6.125%, 6/1/21 (1)                      19,760          19,618
    Washington County Auth.
        5.625%, 6/1/22 (3)                       2,650           2,436
    Washington County Hosp. Auth.
        (Shadyside Hosp.)
        5.875%, 12/15/09 (2)                    22,000          21,899
        (Washington Hosp.)
        6.75%, 7/1/12 (2)                       10,000          10,435
    Wayne County Hosp. &
        Health Facility
        7.125%, 7/1/96 (1) (Prere.)              1,500           1,581
    West Allegheny School Dist.
        6.25%, 8/1/14 (2)                        6,155           6,209
    West Jefferson Hills School Dist.
        5.90%, 8/1/10 (3)                        3,160           3,153
        5.95%, 8/1/14 (3)                        7,180           7,047
    Westmoreland County Auth.
        6.125%, 7/1/17 (1)                       8,205           8,715
    Westview Municipal Auth.
        Water Rev.
        7.50%, 11/15/17 (3)                      2,860           3,002
    York County Southwestern
        School Dist. GO
        6.40%, 6/15/12 (3)                       3,825           3,964
                                                             ---------
    GROUP TOTAL                                              1,290,131
                                                             ---------
- - ----------------------------------------------------------------------
</TABLE>





                                       8
<PAGE>   9


<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
                                                 (000)          (000)+
- - ----------------------------------------------------------------------
<S>                                           <C>            <C> 
PORTFOLIO INSURED (1.0%)
    Allegheny County Hosp.
        Development Auth. (Mercy Hosp.)
        7.375%, 4/1/15                        $  3,650        $  3,864
        (St. Margaret's Hosp.)
        9.80%, 7/1/10                            1,500           1,614
    Pennsylvania Hosp. & Higher
        Education Facilities Auth.
        (Pennsylvania Hosp.)
        7.25%, 7/1/14                            8,535           8,981
                                                              --------
          GROUP TOTAL                                           14,459
                                                              --------
- - ----------------------------------------------------------------------
SECONDARY MARKET INSURED (.9%)
    Allegheny County Hosp.
        Development Auth.
        (Mercy Hosp.)
        7.375%, 4/1/15 (1)                       1,350           1,434
    Pennsylvania GO TOB VRDO
        2.90%, 9/1/94 (3)                        6,425           6,425
    Pennsylvania State Univ.
        5.55%, 8/15/06 (2)                       5,245           5,208
                                                              --------
          GROUP TOTAL                                           13,067
                                                              --------
- - ----------------------------------------------------------------------
NON-INSURED (6.3%)
    Allegheny County Higher Education
        Auth. VRDO (Univ. of Pittsburgh)
        2.65%, 7/1/94                              750             750
    Allegheny County Hosp.
        Development Auth. VRDO
        (Allegheny Health System)
        2.90%, 6/1/94                            2,600           2,600
        (Presbyterian Univ. Health)
        2.75%, 6/1/94                              450             450
    Cambria County Hosp. Auth.
        (Conemaugh Valley Hosp.)
        10.125%, 7/1/95 (Prere.)                 2,000           2,166
    Delaware County Industrial
        Development Auth. VRDO
        (United Parcel Service)
        2.85%, 6/1/94                           22,900          22,900
    Pennsylvania COP
        3.50%, 6/1/94                            5,230           5,230
    Pennsylvania GO
        3.80%, 4/15/95                          13,035          13,054
    Pennsylvania Higher Education
        Facilities Auth.
        (Carnegie Mellon Univ.) VRDO
        2.80%, 6/1/94                            4,500           4,500
        (Univ. of Pennsylvania)
        9.125%, 6/1/95 (Prere.)                  6,725           7,063
    Pennsylvania Housing
        Finance Agency
        7.55%, 4/1/16                            9,670          10,100
        6.90%, 4/1/17                            7,500           7,698
    Pennsylvania Infrastructure
        Investment Auth. VRDO
        (Pennvest Pooled Loan)
        2.70%, 6/1//94                           3,000           3,000
    Pennsylvania State Univ.
        9.00%, 9/1//95 (Prere.)                  1,000           1,079
    Pennsylvania TAN
        3.25%, 6/30/94                           2,700           2,700
    Philadelphia Auth. for Industrial
        Development VRDO
        (Institute for Cancer Research)
        3.00%, 6/1/94                              300             300
    Philadelphia Hosp. & Higher
        Education Facilities Auth.
        (Albert Einstein Medical Center)
        10.00%, 4/1/95 (Prere.)                  1,000           1,072
        (Children's Hosp.) VRDO
        3.00%, 6/1/94                            1,800           1,800
    Swarthmore Borough Auth.
        College Rev. (Swarthmore College)
        7.375%, 9/15/18                          2,200           2,367
OUTSIDE PENNSYLVANIA
    Puerto Rico Govt.
        Development Bank VRDO
        2.60%, 6/1/94                              900             900
                                                              --------
          GROUP TOTAL                                           89,729
                                                              --------
- - ----------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
        (Cost $1,375,543)                                    1,407,386
- - ----------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (1.6%)                                   
- - ----------------------------------------------------------------------
    Other Assets--Note B                                        62,002
    Liabilities                                                (38,937)
                                                              -------- 
                                                                23,065
- - ----------------------------------------------------------------------
NET ASSETS (100%)                                                     
- - ----------------------------------------------------------------------
    Applicable to 131,827,512 outstanding shares
        of beneficial interest
        (unlimited authorization--no par value)             $1,430,451
- - ----------------------------------------------------------------------
    Net Asset Value per Share                                   $10.85
======================================================================
</TABLE>
+ See Note A to Financial Statements.
For explanations of abbreviations and other references, see page 12.





                                       9
<PAGE>   10
STATEMENT OF NET ASSETS (continued)

<TABLE>
<CAPTION>
                                                                      
- - ----------------------------------------------------------------------
AT MAY 31, 1994, NET ASSETS CONSISTED OF:                             
- - ----------------------------------------------------------------------
                                                Amount             Per
                                                 (000)           Share
                                           -----------        --------
<S>                                         <C>                <C>
    Paid in Capital                         $1,380,670          $10.47
    Undistributed Net
        Investment Income                           --              --
    Accumulated Net Realized Gains              15,748             .12
    Unrealized Appreciation
        of Investments--Note D                  34,033             .26
- - ----------------------------------------------------------------------
    NET ASSETS                              $1,430,451          $10.85
- - ----------------------------------------------------------------------

</TABLE>

<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
MONEY MARKET PORTFOLIO                           (000)          (000)+
- - ----------------------------------------------------------------------
<S>                                            <C>             <C>
MUNICIPAL BONDS (99.2%)                                               
- - ----------------------------------------------------------------------
    Allegheny County GO
        VRDO 2.75%, 6/2/94                     $31,200         $31,200
        7.00%, 2/15/95                           1,000           1,043
    Allegheny County Higher Education
        Building Auth. VRDO
        (Univ. of Pittsburgh)
        2.687%, 6/2/94                          31,870          31,870
        2.89%, 6/2/94                            6,610           6,610
    Allegheny County Hosp.
        Development Auth. CP
        (Health Center Development)
        2.45%, 6/13/94                           5,000           5,000
        2.55%, 7/11/94                          15,600          15,600
    Allegheny County Hosp.
        Development Auth. VRDO
        (Allegheny Health System)
        2.90%, 6/1/94                           15,400          15,400
        (Children's Hosp.-Pittsburgh)
        2.788%, 6/2/94 (1)                      21,400          21,400
        (Magee Women's Hosp.)
        TOB 2.95%, 6/2/94 (3)                    2,890           2,890
        (Presbyterian Univ. Health)
        2.75%, 6/2/94 (1)                        4,900           4,900
        (South Hills Health System)
        2.70%, 6/1/94                           10,650          10,650
    Allegheny County Industrial
        Development Auth. PCR CP
        (Duquesne Light & Power Co.)
        2.75%, 10/20/94                          2,000           2,000
        2.80%, 10/20/94                          8,000           8,000
    Allegheny County TRAN
        2.75%, 7/21/94                          28,600          28,612
    Beaver County Industrial
        Development Auth. PCR CP
        (Duquesne Light & Power Co.)
        2.55%, 6/1/94                            5,000           5,000
        3.20%, 7/19/94                           4,700           4,700
    Berks County TRAN
        2.70%, 12/30/94                          2,800           2,800
    Dauphin County General Auth. VRDO
        (Reading Hosp. & Medical Center)
        3.05%, 6/1/94                            8,000           8,000
    Delaware County GO
        6.40%, 12/1/94                           1,000           1,019
    Delaware County Industrial
        Development Auth. VRDO
        (Philadelphia Electric Co.)
        2.90%, 6/1/94                           24,125          24,125
        (United Parcel Service)
        2.85%, 6/1/94                           11,400          11,400
</TABLE>





                                       10
<PAGE>   11


<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
                                                 (000)          (000)+
- - ----------------------------------------------------------------------
    <S>                                       <C>             <C>
    Delaware County PCR CP (3)
        (Philadelphia Electric Co.)
        2.55%, 7/11/94                        $  5,000        $  5,000
        3.20%, 7/19/94                          18,000          18,000
        3.20%, 7/21/94                           4,650           4,650
        3.125%, 7/27/94                          6,800           6,800
        3.20%, 8/11/94                           9,500           9,500
        (Standard Oil, Inc.)
        3.00%, 6/9/94                            4,500           4,500
    Delaware River Port Auth.
        9.375%, 1/1/95 (Prere.)                  7,450           7,944
    Emmaus General Auth. Pooled
        Local Govt. VRDO
        3.20%, 6/1/94                           15,900          15,900
    Erie County GO TOB VRDO
        2.663%, 6/2/94 (3) (Prere.)              6,955           6,955
    Geisinger Health Systems VRDO
        (Montour County)
        3.00%, 6/1/94                           21,700          21,700
    Lehigh County General Purpose
        Auth. CP
        (Hosp. Central Services)
        2.55%, 6/1/94 (1)                        3,700           3,700
        2.65%, 6/2/94 (1)                        3,600           3,600
        2.75%, 6/9/94 (1)                       10,000          10,000
        3.25%, 7/21/94 (1)                       7,500           7,500
    Northeastern Pennsylvania Hosp.
        Auth. CP
        (Hosp. Central Services)
        2.75%, 6/7/94 (1)                        5,500           5,500
        2.70%, 6/10/94 (1)                      19,950          19,950
        2.70%, 6/13/94 (1)                       6,060           6,060
        3.25%, 7/21/94 (1)                       9,700           9,700
    Pennsylvania COP
        3.25%, 7/1/94 (2)                        4,775           4,777
    Pennsylvania GO
        TOB VRDO 2.89%, 6/7/94 (2)               4,600           4,600
        4.40%, 9/1/94                            7,460           7,488
        6.00%, 11/1/94 (1)                       1,000           1,013
        5.00%, 11/15/94 (2)                     10,000          10,114
    Pennsylvania TAN
        3.25%, 6/30/94                          26,800          26,809
    Pennsylvania Higher Education
        Assistance Agency Student
        Loan Rev. VRDO
        2.80%, 6/1/94                           25,200          25,200
    Pennsylvania Higher Education
        Facilities Auth.
        (Carnegie Mellon Univ.)
        VRDO 2.8%, 6/1/94                       60,100          60,100
        (Pooled Finance Auth.)
        VRDO 3.05%, 6/1/94                      21,900          21,900
        (Temple Univ.) VRDO
        3.00%, 6/1/94                           11,500          11,500
        (Thomas Jefferson Univ.)
        2.70%, 6/1/94*                          15,000          15,000
        (Univ. of Pennsylvania) VRDO
        2.85%, 6/1/94                           17,300          17,300
        3.00%, 6/1/94                           30,200          30,200
        (Univ of Pittsburgh)
        2.687%, 6/2/94                          20,500          20,500
    Pennsylvania Infrastructure
        Investment Auth. VRDO
        (Pennvest Pooled Loan)
        2.65%, 6/1/94                           35,500          35,500
    Pennsylvania State Univ. Rev.
        3.00%, 12/5/94                          10,000          10,014
        4.00%, 5/4/95                            8,000           8,036
    Pennsylvania Turnpike Auth. TOB
        VRDO 2.7%, 6/2/94 (Prere.)              10,200          10,200
        3.30%, 6/2/94* (Prere.)                 12,000          12,000
    Philadelphia Auth. for
        Industrial Development VRDO
        (Franklin Institute)
        3.00%, 6/2/94                           11,275          11,275
        (Institute for Cancer Research)
        3.00%, 6/1/94                            4,500           4,500
    Philadelphia Gas Works
        9.125%, 3/15/95 (Prere.)                 5,230           5,584
    Philadelphia Hosp. & Higher
        Education Facilities Auth.
        (Albert Einstein Medical Center)
        10.00%, 4/1/95 (Prere.)                  6,275           6,730
        (Children's Hosp.)
        VRDO 3.00%, 6/1/94                      24,550          24,550
        TOB VRDO 2.95%, 6/2/94                   8,200           8,200
        (Pennsylvania Hosp.)
        VRDO 2.85%, 6/1/94                      10,000          10,000
        2.70%, 7/1/94*                          18,575          18,575
        2.75%, 7/1/94*                          10,000          10,000
    Philadelphia School Dist.
        3.00%, 7/1/94 (2)                       13,305          13,307
    Philadelphia TRAN
        3.25%, 6/15/94                          25,000          25,005
    Pittsburgh Water & Sewer Rev.
        3.50%, 9/1/94 (3)                        8,495           8,512
    Red Lion Area School Dist. TRAN
        2.78%, 6/30/94                           2,500           2,500
    St. Mary's Hosp. Auth. Langhorne
        (Franciscan Health System)
        VRDO 2.85%, 6/1/94                      25,200          25,200
        11.75%, 7/1/94 (Prere.)                 12,495          12,836
    Sayre Health Care Facilities
        Auth. Pooled Loan VRDO
        2.90%, 6/1/94 (2)                       46,050          46,050
</TABLE>





                                       11
<PAGE>   12
STATEMENT OF NET ASSETS (continued)


<TABLE>
<CAPTION>
                                                  Face          Market
                                                Amount           Value
                                                 (000)          (000)+
- - ----------------------------------------------------------------------
 <S>                                          <C>         <C>
    Scranton Lackawanna Health &
        Welfare Auth.
        (Univ. of Scranton)
        3.30%, 11/1/94                        $  5,340    $      5,340
    Somerset County General
        Auth. TOB VRDO
        2.80%, 6/2/94 (Prere.)                  15,540          15,540
    Temple Univ. Notes
        4.50%, 5/24/95                          19,700          19,830
    York County Industrial
        Development Auth. PCR VRDO
        (Philadelphia Electric Co.)
        2.90%, 6/1/94                           14,440          14,440
    OUTSIDE PENNSYLVANIA
      Puerto Rico Govt.
        Development Bank VRDO
        2.60%, 6/1/94                            3,400           3,400
- - ----------------------------------------------------------------------
TOTAL MUNICIPAL BONDS
        (Cost $1,032,803)                                    1,032,803
- - ----------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES (.8%)
- - ----------------------------------------------------------------------
    Other Assets--Note B                                        14,019
    Liabilities                                                 (6,086)
                                                             --------- 
                                                                 7,933
- - ----------------------------------------------------------------------
NET ASSETS (100%)                                                     
- - ----------------------------------------------------------------------
    Applicable to 1,040,769,829 outstanding
    shares of beneficial interest
    (unlimited authorization--no par value)                 $1,040,736
- - ----------------------------------------------------------------------
NET ASSET VALUE PER SHARE                                        $1.00
======================================================================
</TABLE>
+ See Note A to Financial Statements.

<TABLE>
<CAPTION>
- - ----------------------------------------------------------------------
AT MAY 31, 1994, NET ASSETS CONSISTED OF:                             
- - ----------------------------------------------------------------------
                                                Amount             Per
                                                 (000)           Share
                                            ----------        --------
    <S>                                     <C>                  <C>
    Paid in Capital                         $1,040,768           $1.00
    Undistributed Net
        Investment Income                           --              --
    Accumulated Net
        Realized Losses                            (32)             --
    Unrealized Appreciation
        of Investments                              --              --
- - ----------------------------------------------------------------------
    NET ASSETS                              $1,040,736           $1.00
- - ----------------------------------------------------------------------
</TABLE>

(1) MBIA (Municipal Bond Insurance Association)
(2) AMBAC (AMBAC Indemnity Corporation)
(3) FGIC (Financial Guaranty Insurance Company)
(4) FSA (Financial Security Assurance)
(5) CGI (Capital Guaranty Insurance)
(6) BIGI (Bond Investors Guaranty Insurance)
(7) Connie Lee Inc.
(8) FHA (Federal Housing Authority)
CP--Commercial Paper
COP--Certificate of Participation
GO--General Obligation
IDR--Industrial Development Revenue
PCR--Pollution Control Revenue
TAN--Tax Anticipation Note
TOB--Tender Option Bond
TRAN--Tax Revenue Anticipation Note
VRDO--Variable Rate Demand Obligation
(ETM)--Escrowed to Maturity
(Prere.)--Prerefunded
*Put Option Obligation.





                                       12
<PAGE>   13
STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
                                                                          INSURED LONG-TERM                            MONEY MARKET
                                                                                  PORTFOLIO                               PORTFOLIO
- - -----------------------------------------------------------------------------------------------------------------------------------
                                                                           Six Months Ended                        Six Months Ended
                                                                               May 31, 1994                            May 31, 1994
                                                                                      (000)                                   (000)
- - -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                               <C>             <C>                      <C>              <C>
INVESTMENT INCOME
    INCOME
        Interest        . . . . . . . . . . . . . . . . . .                       $  42,906                                 $12,363
- - -----------------------------------------------------------------------------------------------------------------------------------
               Total Income   . . . . . . . . . . . . . . .                          42,906                                  12,363
- - -----------------------------------------------------------------------------------------------------------------------------------
    EXPENSES
        The Vanguard Group--Note B
           Investment Advisory Services   . . . . . . . . .       $     80                                 $  50
           Management and Administrative  . . . . . . . . .          1,258                                   839
           Marketing and Distribution   . . . . . . . . . .            161            1,499                  132              1,021
                                                                  --------                                ------                   
        Insurance Expense . . . . . . . . . . . . . . . . .                              22                                      --
        Auditing Fees   . . . . . . . . . . . . . . . . . .                               4                                       4
        Shareholders' Reports . . . . . . . . . . . . . . .                              42                                      16
        Annual Meeting and Proxy Costs  . . . . . . . . . .                               6                                       2
        Trustees' Fees and Expenses . . . . . . . . . . . .                               4                                       3
- - -----------------------------------------------------------------------------------------------------------------------------------
               Total Expenses   . . . . . . . . . . . . . .                           1,577                                   1,046
- - -----------------------------------------------------------------------------------------------------------------------------------
                   Net Investment Income  . . . . . . . . .                          41,329                                  11,317
- - -----------------------------------------------------------------------------------------------------------------------------------
REALIZED NET GAIN (LOSS)
        Investment Securities Sold  . . . . . . . . . . . .                           9,219                                     (15)
        Futures Contracts . . . . . . . . . . . . . . . . .                          10,703                                      --
- - -----------------------------------------------------------------------------------------------------------------------------------
                   Realized Net Gain (Loss) . . . . . . . .                          19,922                                     (15)
- - ----------------------------------------------------------------------------------------------------------------------------------- 
CHANGE IN UNREALIZED APPRECIATION
    (DEPRECIATION)
        Investment Securities . . . . . . . . . . . . . . .                         (80,044)                                     --
        Futures Contracts . . . . . . . . . . . . . . . . .                             366                                      --
- - -----------------------------------------------------------------------------------------------------------------------------------
                   Change in Unrealized
                       Appreciation (Depreciation)  . . . .                         (79,678)                                     --
- - -----------------------------------------------------------------------------------------------------------------------------------
                   Net Increase (Decrease) in Net Assets
                       Resulting from Operations  . . . . .                        $(18,427)                                $11,302
===================================================================================================================================
</TABLE>





                                       13
<PAGE>   14
STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                            INSURED LONG-TERM PORTFOLIO               MONEY MARKET PORTFOLIO
 -----------------------------------------------------------------------------------------------------------------------------------
                                                                                 Year Ended                               Year Ended
                                                        SIX MONTHS ENDED        November 30,    SIX MONTHS ENDED        November 30,
                                                            MAY 31, 1994               1993         MAY 31, 1994                1993
                                                                   (000)              (000)                (000)               (000)
- - -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                     <C>                    <C>                    <C>                <C>
INCREASE (DECREASE) IN NET ASSETS
OPERATIONS
  Net Investment Income . . . . . . . . . . . . . .     $     41,329           $  76,083              $  11,317          $  19,740
  Realized Net Gain (Loss)                                    19,922               7,978                    (15)                (1)
  Change in Unrealized Appreciation
    (Depreciation)  . . . . . . . . . . . . . . .            (79,678)             63,080                     --                 --
- - -----------------------------------------------------------------------------------------------------------------------------------
      Net Increase (Decrease) in Net Assets
        Resulting from Operations . . . . . . . .            (18,427)            147,141                 11,302             19,739
- - -----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS (1)
  Net Investment Income . . . . . . . . . . . . .            (41,329)            (76,083)               (11,317)           (19,740)
  Realized Net Gain . . . . . . . . . . . . . . .            (10,362)            (23,306)                    --                 --
- - -----------------------------------------------------------------------------------------------------------------------------------
    Total Distributions . . . . . . . . . . . . .            (51,691)            (99,389)               (11,317)           (19,740)
- - -----------------------------------------------------------------------------------------------------------------------------------
CAPITAL SHARE TRANSACTIONS (2)
  Issued     -- Regular . . . . . . . . . . . . .             152,052            395,311                473,006            789,488
             -- In Lieu of Cash Distributions . .              37,746             74,696                 10,501             18,282
             -- Exchange  . . . . . . . . . . . .              61,996            157,533                193,913            258,067
  Redeemed   -- Regular . . . . . . . . . . . . .            (121,445)          (176,200)              (415,322)          (674,563)
             -- Exchange  . . . . . . . . . . . .            (126,137)          (132,803)              (156,620)          (238,098)
- - -----------------------------------------------------------------------------------------------------------------------------------
    Net Increase from Capital
      Share Transactions  . . . . . . . . . . . .               4,212            318,537                105,478            153,176
- - -----------------------------------------------------------------------------------------------------------------------------------
    Total Increase (Decrease) . . . . . . . . . .             (65,906)           366,289                105,463            153,175
- - -----------------------------------------------------------------------------------------------------------------------------------
NET ASSETS
  Beginning of Period . . . . . . . . . . . . . .           1,496,357          1,130,068                935,273            782,098
- - -----------------------------------------------------------------------------------------------------------------------------------
  End of Period (3) . . . . . . . . . . . . . . .          $1,430,451         $1,496,357             $1,040,736           $935,273
===================================================================================================================================
  (1) Distributions Per Share
      Net Investment Income . . . . . . . . . . .               $.309              $.631                  $.011              $.024
      Realized Net Gain . . . . . . . . . . . . .               $.079              $.224                     --                 --
- - -----------------------------------------------------------------------------------------------------------------------------------
  (2) Shares Issued and Redeemed
      Issued  . . . . . . . . . . . . . . . . . .              19,126             49,414                666,919          1,047,555
      Issued in Lieu of Cash Distributions  . . .               3,384              6,721                 10,501             18,282
      Redeemed  . . . . . . . . . . . . . . . . .             (22,386)           (27,522)              (571,942)          (912,661)
- - -----------------------------------------------------------------------------------------------------------------------------------
                                                                  124             28,613                105,478            153,176
- - -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>



                                       14
<PAGE>   15
FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
                                                                      INSURED LONG-TERM PORTFOLIO
- - -------------------------------------------------------------------------------------------------------------------
                                                                                  Year Ended November 30,          
                                                SIX MONTHS ENDED     ----------------------------------------------
For a Share Outstanding Throughout Each Period      MAY 31, 1994       1993      1992      1991      1990      1989
- - -------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>        <C>       <C>       <C>       <C>        <C>
NET ASSET VALUE, BEGINNING OF PERIOD  . . . . . .         $11.36     $10.96    $10.47    $10.19    $10.16     $9.70
                                                          ------     ------    ------    ------    ------     -----
INVESTMENT OPERATIONS
  Net Investment Income . . . . . . . . . . . . .           .309       .631      .664      .667      .679      .687
  Net Realized and Unrealized Gain (Loss)
    on Investments  . . . . . . . . . . . . . . .          (.431)      .624      .520      .286      .030      .460
                                                          ------       ----      ----      ----      ----      ----
      TOTAL FROM INVESTMENT OPERATIONS  . . . . .          (.122)     1.255     1.184      .953      .709     1.147
- - -------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . . .          (.309)     (.631)    (.664)    (.667)    (.679)    (.687)
  Distributions from Realized Capital Gains . . .          (.079)     (.224)    (.030)    (.006)       --        --
                                                          ------       ----      ----      ----      ----      ----
      TOTAL DISTRIBUTIONS   . . . . . . . . . . .          (.388)     (.855)    (.694)    (.673)    (.679)    (.687)
- - -------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . .         $10.85     $11.36    $10.96    $10.47    $10.19    $10.16
===================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . .         -1.11%    +11.90%   +11.65%    +9.65%    +7.27%   +12.16%
- - -------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- - ------------------------
Net Assets, End of Period (Millions)  . . . . . .         $1,430     $1,496    $1,130      $828      $556      $416
Ratio of Expenses to Average Net Assets . . . . .          .21%*       .20%     .24%+     .25%+     .25%+     .26%+
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . . .         5.59%*      5.61%     6.17%     6.46%     6.77%     6.87%
Portfolio Turnover Rate . . . . . . . . . . . . .           19%*        14%       17%        2%        9%        8%
- - -------------------------------------------------------------------------------------------------------------------
</TABLE>
+Insurance expense represents .01%, .01%, .02%, and .03%.
*Annualized.


                                       15
<PAGE>   16

FINANCIAL HIGHLIGHTS (continued)

<TABLE>
<CAPTION>
                                                                         MONEY MARKET PORTFOLIO                    
- - -------------------------------------------------------------------------------------------------------------------
                                                                                  Year Ended November 30,          
                                                SIX MONTHS ENDED       --------------------------------------------
For a Share Outstanding Throughout Each Period      MAY 31, 1994       1993      1992      1991      1990      1989
- - -------------------------------------------------------------------------------------------------------------------
<C>                                                       <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 . . . . . . . . . . . . .           .011       .024      .029      .045      .057      .062
  Net Realized and Unrealized Gain (Loss)
    on Investments  . . . . . . . . . . . . . . .             --         --        --        --        --        --
                                                          ------     ------    ------    ------    ------    ------
      TOTAL FROM INVESTMENT OPERATIONS  . . . . .           .011       .024      .029      .045      .057      .062
- - -------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income  . . . . .          (.011)     (.024)    (.029)    (.045)    (.057)    (.062)
  Distributions from Realized Capital Gains . . .             --         --        --        --        --        --
                                                          ------     ------    ------    ------    ------    ------
      TOTAL DISTRIBUTIONS   . . . . . . . . . . .          (.011)     (.024)    (.029)    (.045)    (.057)    (.062)
- - -------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD  . . . . . . . . .          $1.00      $1.00     $1.00     $1.00     $1.00     $1.00
===================================================================================================================
TOTAL RETURN  . . . . . . . . . . . . . . . . . .         +1.14%     +2.38%    +2.96%    +4.59%    +5.85%    +6.38%
- - -------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
- - ------------------------
Net Assets, End of Period (Millions)  . . . . . .         $1,041       $935      $782      $818      $730      $448
Ratio of Expenses to Average Net Assets . . . . .          .21%*       .20%      .24%      .24%      .23%      .23%
Ratio of Net Investment Income to
  Average Net Assets  . . . . . . . . . . . . . .         2.27%*      2.35%     2.93%     4.48%     5.68%     6.19%
Portfolio Turnover Rate . . . . . . . . . . . . .            N/A        N/A       N/A       N/A       N/A       N/A
- - -------------------------------------------------------------------------------------------------------------------
</TABLE>
*Annualized.


                                       16
<PAGE>   17
NOTES TO FINANCIAL STATEMENTS

Vanguard Pennsylvania Tax-Free Fund is registered under the Investment Company
Act of 1940 as an open-end investment company and consists of the Insured
Long-Term and Money Market Portfolios. Each Portfolio 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 are in conformity
with generally accepted accounting principles for investment companies. Such
policies are consistently followed by the Fund in the preparation of financial
statements.

1.          SECURITY VALUATION: Money Market Portfolio: investment securities   
            are stated at amortized cost which approximates market value.
            Insured Long-Term Portfolio: municipal bonds are valued utilizing
            primarily the latest bid prices or, if bid prices are not available,
            on the basis of valuations based on a matrix system (which considers
            such factors as security prices, yields, maturities and ratings),
            both as furnished by an independent pricing service.

2.          FEDERAL INCOME TAXES: Each Portfolio of the 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: The Insured Long-Term Portfolio utilizes futures contracts
            to a limited extent. The primary risks associated with the use of
            futures contracts are imperfect correlation between the change
            in market value of the bonds held by the Portfolio and the prices of
            futures contracts, and the possibility of an illiquid market.
            Futures contracts are valued based upon their quoted daily
            settlement prices. Fluctuations in the value of futures contracts
            are recorded as unrealized appreciation (depreciation) until
            terminated at which time realized gains (losses) are recognized.
            Unrealized appreciation (depreciation) related to open futures
            contracts is required to be treated as realized gain (loss) for
            Federal income tax purposes.

4.          DISTRIBUTIONS: Distributions from net investment income are
            declared on a daily basis payable on the first business day of the
            following month. Annual distributions from realized gains, if any,
            are recorded on the ex-dividend date. 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.

5.          OTHER: Security transactions are accounted for on the date the
            securities are purchased or sold. Costs used in determining realized
            gains and losses on the sale of investment securities are those of
            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, Inc. furnishes at cost  investment advisory,
corporate management, administrative, marketing and distribution services. The
costs of such services are allocated to the Fund under methods approved by the
Board of Trustees. The Fund has contributed capital aggregating $395,000 to
Vanguard (included in Other Assets), representing 2.0% of Vanguard's
capitalization. The Fund's officers and trustees are also officers and
directors of Vanguard.



                                       17
<PAGE>   18

NOTES TO FINANCIAL STATEMENTS (continued)

*C.         During the six months ended May 31, 1994, the Insured Long-Term
Portfolio made purchases of $131,748,000 and sales of $143,311,000 of
investment securities other than temporary cash investments.

*D.         At May 31, 1994, unrealized appreciation of investment securities
of the Insured Long-Term Portfolio for financial reporting and Federal income
tax purposes aggregated $31,843,000 of which $48,575,000 related to appreciated
securities and $16,732,000 related to depreciated securities.

At May 31, 1994, the Insured Long-Term Portfolio had long positions in
Municipal Bond Index futures contracts expiring in June 1994, with an aggregate
settlement value and net unrealized depreciation of $75,070,000 and $3,049,000,
respectively. The aggregate settlement value and net unrealized appreciation
related to short positions in U.S. Treasury Bond  futures contracts expiring
through September 1994 were $187,936,000 and $5,239,000, respectively. The
market value of securities deposited as initial margin for open futures
contracts was $3,604,000.



                                       18
<PAGE>   19
TRUSTEES AND OFFICERS

JOHN C. BOGLE, Chairman and Chief Executive Officer
Chairman and Director of The Vanguard Group, Inc., and of each of the
investment companies in The Vanguard Group. 

JOHN J. BRENNAN, President
President and Director of The Vanguard Group, Inc., and of each of the
investment companies in The Vanguard Group.

ROBERT E. CAWTHORN, Chairman and Chief Executive Officer of Rhone-Poulenc Rorer
Inc.; Director of Sun Company, Inc. and Immune Response Corporation; Trustee of
the Universal Health Realty Income Trust.

BARBARA BARNES HAUPTFUHRER, Director of The Great Atlantic and Pacific Tea
Company, Alco Standard Corp., Raytheon Company, Knight- Ridder, Inc., and
Massachusetts Mutual Life Insurance Co.

BURTON G. MALKIEL, Chemical Bank Chairman's Professor of Economics, Princeton
University; Director of Prudential Insurance Co. of America, Amdahl
Corporation, Baker Fentress & Co., and The Southern New England Telephone
Company.

ALFRED M. RANKIN, JR., President and Chief Executive Officer of NACCO
Industries, Inc.; Director of NACCO Industries, The BFGoodrich Company, and The
Standard Products Company.

JOHN C. SAWHILL, President and Chief Executive Officer of The Nature
Conservancy; formerly, Director and Senior Partner of McKinsey & Co. and
President of New York University; Director of Pacific Gas and Electric Company
and NACCO Industries.

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

J. LAWRENCE WILSON, Chairman and Chief Executive Officer of Rohm & Haas
Company; Director of Cummins Engine Company; Trustee of Vanderbilt University
and the Culver Educational Foundation.



OTHER FUND OFFICERS

RICHARD F. HYLAND, Treasurer; Treasurer of The Vanguard Group, Inc., and of
each of the investment companies in The Vanguard Group.

RAYMOND J. KLAPINSKY, Secretary; Senior Vice President and Secretary of The
Vanguard Group, Inc.; Secretary of each of the investment companies in The
Vanguard Group.

KAREN E. WEST, CONTROLLER; Vice President of The Vanguard Group, Inc.;
Controller of each of the investment companies in The Vanguard Group.

OTHER VANGUARD GROUP OFFICERS

JEREMY G. DUFFIELD
Senior Vice President
Planning & Development

JAMES H. GATELY
Senior Vice President
Institutional

IAN A. MACKINNON
Senior Vice President
Fixed Income Group

VINCENT S. MCCORMACK
Senior Vice President
Operations

RALPH K. PACKARD
Senior Vice President
Chief Financial Officer



                                       19
<PAGE>   20


                          THE VANGUARD FAMILY OF FUNDS

                               MONEY MARKET FUNDS
                         Vanguard Money Market Reserves

                         TAX-EXEMPT MONEY MARKET FUNDS
              Vanguard Municipal Bond Fund-Money Market Portfolio
                 Vanguard State Tax-Free Funds (CA, NJ, OH, PA)

                            TAX-EXEMPT INCOME FUNDS
                          Vanguard Municipal Bond Fund
             Vanguard State Tax-Free Funds (CA, FL, NJ, NY, OH, PA)

                               FIXED INCOME FUNDS
                             Vanguard Admiral Funds
                            Vanguard Bond Index Fund
                     Vanguard Fixed Income Securities Fund
                         Vanguard Preferred Stock Fund

                                 BALANCED FUNDS
                         Vanguard Asset Allocation Fund
                          Vanguard Balanced Index Fund
                               Vanguard STAR Fund
                         Vanguard/Wellesley Income Fund
                            Vanguard/Wellington Fund

                                  EQUITY FUNDS
                            GROWTH AND INCOME FUNDS
                      Vanguard Convertible Securities Fund
                          Vanguard Equity Income Fund
                              Vanguard Index Trust
                        Vanguard Quantitative Portfolios
                 Vanguard/Trustees' Equity Fund-U.S. Portfolio
                             Vanguard/Windsor Fund
                              Vanguard/Windsor II

                                  GROWTH FUNDS
                          Vanguard/Morgan Growth Fund
                             Vanguard/PRIMECAP Fund
                         Vanguard U.S. Growth Portfolio

                            AGGRESSIVE GROWTH FUNDS
                             Vanguard Explorer Fund
                        Vanguard Specialized Portfolios

                              INTERNATIONAL FUNDS
                    Vanguard International Equity Index Fund
                    Vanguard International Growth Portfolio
             Vanguard/Trustees' Equity Fund-International Portfolio

                 The Vanguard Group * Vanguard Financial Center
                             Valley Forge, PA 19482
                   New Account Information: 1-(800) 662-7447
                 Shareholder Account Services: 1-(800) 662-2739

               This Report has been prepared for shareholders and
                may be distributed to others only if preceded or
             accompanied by a current prospectus. All Funds in the
                Vanguard Family are offered by prospectus only.

                                   Q772-05/94



[VANGUARD PENNSYLVANIA TAX-FREE FUND LOGO]




[PHOTO -- SEE EDGAR APPENDIX]




SEMI-ANNUAL REPORT
MAY 31, 1994
<PAGE>   21


                                EDGAR APPENDIX


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