<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>                   6-MOS
<FISCAL-YEAR-END>                          OCT-31-2000
<PERIOD-START>                             NOV-01-1999
<PERIOD-END>                               APR-30-2000
<INVESTMENTS-AT-COST>                           828808
<INVESTMENTS-AT-VALUE>                          789379
<RECEIVABLES>                                    13746
<ASSETS-OTHER>                                    2825
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  805950
<PAYABLE-FOR-SECURITIES>                          4121
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3359
<TOTAL-LIABILITIES>                               7480
<SENIOR-EQUITY>                                 295000
<PAID-IN-CAPITAL-COMMON>                        556358
<SHARES-COMMON-STOCK>                            39126
<SHARES-COMMON-PRIOR>                            39117
<ACCUMULATED-NII-CURRENT>                        (121)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        (13337)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (39430)
<NET-ASSETS>                                    798470
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                23952
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1834
<NET-INVESTMENT-INCOME>                          22117
<REALIZED-GAINS-CURRENT>                        (7283)
<APPREC-INCREASE-CURRENT>                        11837
<NET-CHANGE-FROM-OPS>                            26671
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        17253
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                            3687
<ACCUMULATED-NII-PRIOR>                            758
<ACCUMULATED-GAINS-PRIOR>                       (6053)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2472
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3073
<AVERAGE-NET-ASSETS>                            794017
<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>