<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF EARNINGS FOR THE TWELVE MONTHS ENDED DECEMBER 31,
1998, AND THE CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>  1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         180,568
<SECURITIES>                                         0
<RECEIVABLES>                                  218,081
<ALLOWANCES>                                     7,391
<INVENTORY>                                    143,680
<CURRENT-ASSETS>                               576,381
<PP&E>                                       2,280,756
<DEPRECIATION>                               1,384,971
<TOTAL-ASSETS>                               1,658,611
<CURRENT-LIABILITIES>                          211,462
<BONDS>                                         76,533
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       139,705
<OTHER-SE>                                   1,013,995
<TOTAL-LIABILITY-AND-EQUITY>                 1,658,611
<SALES>                                      1,776,434
<TOTAL-REVENUES>                             1,776,434
<CGS>                                        1,226,764
<TOTAL-COSTS>                                1,226,764
<OTHER-EXPENSES>                                 7,851
<LOSS-PROVISION>                                   750
<INTEREST-EXPENSE>                               6,782
<INCOME-PRETAX>                                374,844
<INCOME-TAX>                                   118,936
<INCOME-CONTINUING>                            255,908
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   255,908
<EPS-PRIMARY>                                     2.54
<EPS-DILUTED>                                     2.50