<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> DEC-31-1998 <CASH> 268,934 <SECURITIES> 41,133 <RECEIVABLES> 145,079 <ALLOWANCES> 0 <INVENTORY> 12,001 <CURRENT-ASSETS> 619,232 <PP&E> 768,925 <DEPRECIATION> 424,365 <TOTAL-ASSETS> 1,203,034 <CURRENT-LIABILITIES> 451,366 <BONDS> 106,321 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 80,481 <OTHER-SE> 528,429 <TOTAL-LIABILITY-AND-EQUITY> 1,203,034 <SALES> 1,931,796 <TOTAL-REVENUES> 1,931,796 <CGS> 912,780 <TOTAL-COSTS> 1,685,161 <OTHER-EXPENSES> (8,178) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 8,273 <INCOME-PRETAX> 246,540 <INCOME-TAX> 101,132 <INCOME-CONTINUING> 145,408 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 145,408 <EPS-PRIMARY> 1.80 <EPS-DILUTED> 1.80