<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 its entirety by
references to such documents.
</LEGEND>
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> AUG-31-2000
<PERIOD-START> SEP-01-1999
<PERIOD-END> AUG-31-2000
<INVESTMENTS-AT-COST> 479819
<INVESTMENTS-AT-VALUE> 512038
<RECEIVABLES> 9005
<ASSETS-OTHER> 1226
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 522269
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2121
<TOTAL-LIABILITIES> 2121
<SENIOR-EQUITY> 185000
<PAID-IN-CAPITAL-COMMON> 302742
<SHARES-COMMON-STOCK> 21751
<SHARES-COMMON-PRIOR> 21670
<ACCUMULATED-NII-CURRENT> 199
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (12)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 32219
<NET-ASSETS> 520148
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 30590
<OTHER-INCOME> 0
<EXPENSES-NET> 3888
<NET-INVESTMENT-INCOME> 26702
<REALIZED-GAINS-CURRENT> 256
<APPREC-INCREASE-CURRENT> 3178
<NET-CHANGE-FROM-OPS> 30136
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 21041
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 81
<NET-CHANGE-IN-ASSETS> 4086
<ACCUMULATED-NII-PRIOR> 778
<ACCUMULATED-GAINS-PRIOR> (268)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3215
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3930
<AVERAGE-NET-ASSETS> 507110
<PER-SHARE-NAV-BEGIN> 0
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 0
<EXPENSE-RATIO> 0
</TABLE>
