<ARTICLE> 5
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-2000
<PERIOD-START>                             APR-01-2000             JAN-01-2000
<PERIOD-END>                               JUN-30-2000             JUN-30-2000
<CASH>                                           6,319                   6,319
<SECURITIES>                                    28,283                  28,283
<RECEIVABLES>                                   32,340                  32,340
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<DEPRECIATION>                                 525,201                 525,201
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<CURRENT-LIABILITIES>                                0                       0
<BONDS>                                      3,395,068               3,395,068
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                    100,000                 100,000
<COMMON>                                           680                     680
<OTHER-SE>                                   1,073,497               1,073,497
<TOTAL-LIABILITY-AND-EQUITY>                 5,539,054               5,539,054
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<CGS>                                                0                       0
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<OTHER-EXPENSES>                                40,984                  80,623
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              56,243                 111,458
<INCOME-PRETAX>                                 34,880                  65,857
<INCOME-TAX>                                         0                       0
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<DISCONTINUED>                                       0                       0
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<NET-INCOME>                                    34,880                  65,857
<EPS-BASIC>                                        .51                     .97
<EPS-DILUTED>                                      .50                     .96