<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-END> SEP-30-2000 <CASH> 18,847 <SECURITIES> 0 <RECEIVABLES> 179,445 <ALLOWANCES> 2,609 <INVENTORY> 104,369 <CURRENT-ASSETS> 312,750 <PP&E> 1,305,614 <DEPRECIATION> 822,797 <TOTAL-ASSETS> 976,935 <CURRENT-LIABILITIES> 142,938 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 458 <OTHER-SE> 546,609 <TOTAL-LIABILITY-AND-EQUITY> 976,935 <SALES> 698,739 <TOTAL-REVENUES> 698,739 <CGS> 489,292 <TOTAL-COSTS> 571,962 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 4,542 <INCOME-PRETAX> 124,735 <INCOME-TAX> 38,668 <INCOME-CONTINUING> 86,067 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 86,067 <EPS-BASIC> 1.88 <EPS-DILUTED> 1.85