<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-END> MAR-31-2000 <CASH> $21,378 <SECURITIES> $0 <RECEIVABLES> $160,462 <ALLOWANCES> $2,618 <INVENTORY> $105,562 <CURRENT-ASSETS> $299,247 <PP&E> $1,290,502 <DEPRECIATION> $803,698 <TOTAL-ASSETS> $914,308 <CURRENT-LIABILITIES> $127,423 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> $458 <OTHER-SE> $502,451 <TOTAL-LIABILITY-AND-EQUITY> $914,308 <SALES> $235,480 <TOTAL-REVENUES> $235,480 <CGS> $160,878 <TOTAL-COSTS> $193,312 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> $1,767 <INCOME-PRETAX> $41,374 <INCOME-TAX> $12,826 <INCOME-CONTINUING> $28,548 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> $28,548 <EPS-BASIC> $0.62 <EPS-DILUTED> $0.61