WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ACCOUNTING
RECORDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH ACCOUNTING
RECORDS.
</LEGEND>
<SERIES>
<NUMBER> 101
<NAME> US GOVERNMENT TAX-EXEMPT MONEY MARKET CLASS A
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUL-31-2000
<PERIOD-START> AUG-01-1999
<PERIOD-END> JUL-31-2000
<INVESTMENTS-AT-COST> "3,053,030,087 "
<INVESTMENTS-AT-VALUE> "3,599,413,333 "
<RECEIVABLES> "40,121,809 "
<ASSETS-OTHER> "872,540 "
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> "3,640,407,682 "
<PAYABLE-FOR-SECURITIES> "225,000,000 "
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> "11,406,744 "
<TOTAL-LIABILITIES> "236,406,744 "
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> "3,404,000,958 "
<SHARES-COMMON-STOCK> "3,404,000,990 "
<SHARES-COMMON-PRIOR> "3,576,798,415 "
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (20)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> "3,404,000,938 "
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> "207,101,091 "
<OTHER-INCOME> 0
<EXPENSES-NET> "(29,262,852)"
<NET-INVESTMENT-INCOME> "177,838,239 "
<REALIZED-GAINS-CURRENT> (20)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> "177,838,219 "
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> "(177,838,239)"
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> "12,626,674,787 "
<NUMBER-OF-SHARES-REDEEMED> "(12,976,003,301)"
<SHARES-REINVESTED> "176,531,057 "
<NET-CHANGE-IN-ASSETS> "(172,797,477)"
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> "(6,239,091)"
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> "(29,370,942)"
<AVERAGE-NET-ASSETS> "3,562,579,930 "
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.05
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.05)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.82
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
