<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED BALANCE SHEETS, CONSOLIDATED STATEMENTS OF INCOME, AND NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FORM 10-K, DECEMBER 31, 1996. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> DEC-31-1996 <CASH> 38,663 <SECURITIES> 33,567 <RECEIVABLES> 124,817 <ALLOWANCES> 693 <INVENTORY> 13,493 <CURRENT-ASSETS> 263,805 <PP&E> 456,891 <DEPRECIATION> 278,376 <TOTAL-ASSETS> 473,045 <CURRENT-LIABILITIES> 171,263 <BONDS> 43,602 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 182 <OTHER-SE> 233,423 <TOTAL-LIABILITY-AND-EQUITY> 473,045 <SALES> 928,799 <TOTAL-REVENUES> 928,799 <CGS> 818,144 <TOTAL-COSTS> 889,731 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 4,367 <INCOME-PRETAX> 43,409 <INCOME-TAX> 16,061 <INCOME-CONTINUING> 27,348 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 27,348 <EPS-PRIMARY> 1.51 <EPS-DILUTED> 1.51