<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
<F1> This item relates to the Fund on a composite
basis and not on a class basis
</LEGEND>
<SERIES>
<NUMBER> 12
<NAME> GOV'T SECS B
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 1,623,043,680 <F1>
<INVESTMENTS-AT-VALUE> 1,609,288,275 <F1>
<RECEIVABLES> 20,347,853 <F1>
<ASSETS-OTHER> 210,432 <F1>
<OTHER-ITEMS-ASSETS> 0 <F1>
<TOTAL-ASSETS> 1,629,846,560 <F1>
<PAYABLE-FOR-SECURITIES> 49,218,750 <F1>
<SENIOR-LONG-TERM-DEBT> 0 <F1>
<OTHER-ITEMS-LIABILITIES> 15,461,251 <F1>
<TOTAL-LIABILITIES> 64,680,001 <F1>
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,251,540
<SHARES-COMMON-STOCK> 6,774,890
<SHARES-COMMON-PRIOR> 9,664,052
<ACCUMULATED-NII-CURRENT> (3,791,181)<F1>
<OVERDISTRIBUTION-NII> 0 <F1>
<ACCUMULATED-NET-GAINS> (531,944,807)<F1>
<OVERDISTRIBUTION-GAINS> 0 <F1>
<ACCUM-APPREC-OR-DEPREC> (14,050,324)<F1>
<NET-ASSETS> 65,093,762
<DIVIDEND-INCOME> 0 <F1>
<INTEREST-INCOME> 56,706,118 <F1>
<OTHER-INCOME> 0 <F1>
<EXPENSES-NET> (8,983,705)<F1>
<NET-INVESTMENT-INCOME> 47,722,413 <F1>
<REALIZED-GAINS-CURRENT> (37,917,781)<F1>
<APPREC-INCREASE-CURRENT> 20,115,317 <F1>
<NET-CHANGE-FROM-OPS> 29,919,949 <F1>
<EQUALIZATION> 0 <F1>
<DISTRIBUTIONS-OF-INCOME> (2,083,363)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,289,784
<NUMBER-OF-SHARES-REDEEMED> 161,967
<SHARES-REINVESTED> (4,340,913)
<NET-CHANGE-IN-ASSETS> (28,771,552)
<ACCUMULATED-NII-PRIOR> (1,607,656)<F1>
<ACCUMULATED-GAINS-PRIOR> (494,027,026)<F1>
<OVERDISTRIB-NII-PRIOR> 0 <F1>
<OVERDIST-NET-GAINS-PRIOR> 0 <F1>
<GROSS-ADVISORY-FEES> 4,425,803 <F1>
<INTEREST-EXPENSE> 0 <F1>
<GROSS-EXPENSE> 8,997,292 <F1>
<AVERAGE-NET-ASSETS> 77,870,067
<PER-SHARE-NAV-BEGIN> 9.713
<PER-SHARE-NII> 0.241
<PER-SHARE-GAIN-APPREC> (0.089)
<PER-SHARE-DIVIDEND> 0.000
<PER-SHARE-DISTRIBUTIONS> (0.257)
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 9.608
<EXPENSE-RATIO> 1.78
</TABLE>
