<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THIS FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE CONSOLIDATED BALANCE SHEET AND RELATED CONSOLIDATED STATEMENT OF INCOME
AS OF AND FOR THE SIX MONTH PERIOD ENDING JUNE 30, 2000 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-END> JUN-30-2000
<CASH> 144,147
<SECURITIES> 0
<RECEIVABLES> 90,589
<ALLOWANCES> 3,990
<INVENTORY> 0
<CURRENT-ASSETS> 287,302
<PP&E> 4,055,729
<DEPRECIATION> 870,233
<TOTAL-ASSETS> 6,162,953
<CURRENT-LIABILITIES> 107,556
<BONDS> 796,598
0
0
<COMMON> 1,496
<OTHER-SE> 2,940,076
<TOTAL-LIABILITY-AND-EQUITY> 6,162,953
<SALES> 621,353
<TOTAL-REVENUES> 621,353
<CGS> 0
<TOTAL-COSTS> 354,279
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 56,557
<INCOME-PRETAX> 210,517
<INCOME-TAX> 94,733
<INCOME-CONTINUING> 115,784
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 115,784
<EPS-BASIC> 0.77
<EPS-DILUTED> 0.77
</TABLE>