<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-END> JUN-30-2000 JUN-30-2000
<CASH> 17,033 17,033
<SECURITIES> 0 0
<RECEIVABLES> 7,487 7,487
<ALLOWANCES> 537 537
<INVENTORY> 0 0
<CURRENT-ASSETS> 0 0
<PP&E> 3,654,866 3,654,866
<DEPRECIATION> 270,065 270,065
<TOTAL-ASSETS> 3,628,104 3,628,104
<CURRENT-LIABILITIES> 0 0
<BONDS> 1,487,277 1,487,277
0 0
0 0
<COMMON> 588 588
<OTHER-SE> 1,517,242 1,517,242
<TOTAL-LIABILITY-AND-EQUITY> 3,628,104 3,628,104
<SALES> 0 0
<TOTAL-REVENUES> 145,889 288,868
<CGS> 0 0
<TOTAL-COSTS> 64,514 129,521
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 26,835 53,261
<INCOME-PRETAX> 40,153 85,586
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 20,387 54,754
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 94,308 130,923
<EPS-BASIC> 1.61 2.24
<EPS-DILUTED> 1.52 2.14
</TABLE>