<TABLE> <S> <C>
<ARTICLE> 5
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<CASH> 17,785
<SECURITIES> 0
<RECEIVABLES> 162,376
<ALLOWANCES> 2,691
<INVENTORY> 109,716
<CURRENT-ASSETS> 298,942
<PP&E> 1,299,823
<DEPRECIATION> 818,374
<TOTAL-ASSETS> 969,394
<CURRENT-LIABILITIES> 124,448
<BONDS> 0
0
0
<COMMON> 457
<OTHER-SE> 531,565
<TOTAL-LIABILITY-AND-EQUITY> 969,394
<SALES> 461,686
<TOTAL-REVENUES> 461,686
<CGS> 321,078
<TOTAL-COSTS> 369,653
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 2,991
<INCOME-PRETAX> 90,378
<INCOME-TAX> 28,017
<INCOME-CONTINUING> 62,361
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 62,361
<EPS-BASIC> 1.36
<EPS-DILUTED> 1.34
</TABLE>