<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF OPERATIONS AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 4,622
<SECURITIES> 0
<RECEIVABLES> 2,652
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 10,468
<PP&E> 747,954
<DEPRECIATION> 262,840
<TOTAL-ASSETS> 499,799
<CURRENT-LIABILITIES> 17,248
<BONDS> 454,979
0
0
<COMMON> 159
<OTHER-SE> 23,795
<TOTAL-LIABILITY-AND-EQUITY> 499,799
<SALES> 0
<TOTAL-REVENUES> 59,824
<CGS> 0
<TOTAL-COSTS> 0
<OTHER-EXPENSES> 37,041
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 15,662
<INCOME-PRETAX> 16,582
<INCOME-TAX> 0
<INCOME-CONTINUING> 14,317
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 14,317
<EPS-BASIC> .92
<EPS-DILUTED> .91
</TABLE>