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<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 052
<NAME>U.S GOVERNMENT SECURITIES FUND CL. B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 466,532,701
<INVESTMENTS-AT-VALUE> 450,444,758
<RECEIVABLES> 4,078,758
<ASSETS-OTHER> 13,563,250
<OTHER-ITEMS-ASSETS> 10,566
<TOTAL-ASSETS> 468,097,332
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 15,523,551
<TOTAL-LIABILITIES> 15,523,551
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 64,071,122
<SHARES-COMMON-STOCK> 5,530,945
<SHARES-COMMON-PRIOR> 6,928,738
<ACCUMULATED-NII-CURRENT> 213,884
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (70,959,179)
<ACCUM-APPREC-OR-DEPREC> (16,087,943)
<NET-ASSETS> 56,972,325
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 16,317,807
<OTHER-INCOME> 0
<EXPENSES-NET> 2,037,180
<NET-INVESTMENT-INCOME> 14,283,974
<REALIZED-GAINS-CURRENT> (1,669,978)
<APPREC-INCREASE-CURRENT> (7,587,049)
<NET-CHANGE-FROM-OPS> 5,026,947
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,749,137)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 931,691
<NUMBER-OF-SHARES-REDEEMED> (2,462,526)
<SHARES-REINVESTED> 133,042
<NET-CHANGE-IN-ASSETS> (26,476,554)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (69,289,201)
<GROSS-ADVISORY-FEES> 1,149,328
<INTEREST-EXPENSE> 0
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<AVERAGE-NET-ASSETS> 65,925,112
<PER-SHARE-NAV-BEGIN> 10.50
<PER-SHARE-NII> 0.28
<PER-SHARE-GAIN-APPREC> (0.20)
<PER-SHARE-DIVIDEND> (0.28)
<PER-SHARE-DISTRIBUTIONS> 0.00
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<PER-SHARE-NAV-END> 10.30
<EXPENSE-RATIO> 1.65
</TABLE>
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