<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-01-2000 <PERIOD-END> JUN-30-2000 <CASH> 91,168 <SECURITIES> 6,311 <RECEIVABLES> 129,452 <ALLOWANCES> 3,311 <INVENTORY> 11,505 <CURRENT-ASSETS> 343,726 <PP&E> 640,837 <DEPRECIATION> 368,486 <TOTAL-ASSETS> 1,030,833 <CURRENT-LIABILITIES> 333,212 <BONDS> 113,499 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 72,331 <OTHER-SE> 425,194 <TOTAL-LIABILITY-AND-EQUITY> 1,030,833 <SALES> 811,182 <TOTAL-REVENUES> 811,182 <CGS> 351,894 <TOTAL-COSTS> 677,813 <OTHER-EXPENSES> (30,653) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 7,248 <INCOME-PRETAX> 156,774 <INCOME-TAX> 30,783 <INCOME-CONTINUING> 125,991 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 125,991 <EPS-BASIC> 1.74 <EPS-DILUTED> 1.74