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SIGNATURE STEPHEN D. FOY
TITLE V.P. & CONTROLLER
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<AVG-DEBT-OUTSTANDING> 0
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in it entirety by references
to such documents.
</LEGEND>
<SERIES>
<NUMBER> 012
<NAME> NATIONAL INSURED BOND FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
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<FISCAL-YEAR-END> FEB-28-1999
<PERIOD-START> MAR-01-1998
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<OVERDISTRIBUTION-GAINS> 0
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<INTEREST-INCOME> 0
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<NET-INVESTMENT-INCOME> 0
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<NET-CHANGE-FROM-OPS> 0
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<NET-CHANGE-IN-ASSETS> 0
<ACCUMULATED-NII-PRIOR> 0
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<AVG-DEBT-OUTSTANDING> 0
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in it entirety by references
to such documents.
</LEGEND>
<SERIES>
<NUMBER> 013
<NAME> NATIONAL INSURED BOND FUND CLASS C
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> FEB-28-1999
<PERIOD-START> MAR-01-1998
<PERIOD-END> FEB-28-1999
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<OVERDISTRIBUTION-GAINS> 0
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<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 0
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 0
<REALIZED-GAINS-CURRENT> 0
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<NET-CHANGE-FROM-OPS> 0
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<DISTRIBUTIONS-OF-INCOME> 0
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<DISTRIBUTIONS-OTHER> 0
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<NET-CHANGE-IN-ASSETS> 0
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<PER-SHARE-NAV-END> 0
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
