<TABLE> <S> <C>
<ARTICLE> 5
<MULTIPLIER>1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<CASH> 18,997
<SECURITIES> 0
<RECEIVABLES> 367,843
<ALLOWANCES> 0
<INVENTORY> 51,546
<CURRENT-ASSETS> 468,152
<PP&E> 9,672,646
<DEPRECIATION> (3,972,636)
<TOTAL-ASSETS> 6,214,799
<CURRENT-LIABILITIES> 375,437
<BONDS> 2,192,815
208,207
98,387
<COMMON> 146,255
<OTHER-SE> 2,443,503
<TOTAL-LIABILITY-AND-EQUITY> 6,214,799
<SALES> 934,323
<TOTAL-REVENUES> 935,229
<CGS> 408,523
<TOTAL-COSTS> 408,523
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 54,970
<INCOME-PRETAX> 440,494
<INCOME-TAX> 178,853
<INCOME-CONTINUING> 261,641
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 261,641
<EPS-BASIC> 2.21
<EPS-DILUTED> 2.15
</TABLE>