<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> DEC-31-1999 <CASH> 13,171 <SECURITIES> 0 <RECEIVABLES> 259,530 <ALLOWANCES> 0 <INVENTORY> 45,113 <CURRENT-ASSETS> 343,068 <PP&E> 8,826,967 <DEPRECIATION> (3,711,109) <TOTAL-ASSETS> 5,502,543 <CURRENT-LIABILITIES> 336,778 <BONDS> 1,879,650 <PREFERRED-MANDATORY> 210,490 <PREFERRED> 98,387 <COMMON> 145,504 <OTHER-SE> 2,215,046 <TOTAL-LIABILITY-AND-EQUITY> 5,502,543 <SALES> 1,297,898 <TOTAL-REVENUES> 1,300,505 <CGS> 819,772 <TOTAL-COSTS> 819,772 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 82,266 <INCOME-PRETAX> 344,573 <INCOME-TAX> 143,718 <INCOME-CONTINUING> 200,855 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 200,855 <EPS-BASIC> 1.73 <EPS-DILUTED> 1.72