<ARTICLE> 5 <MULTIPLIER> 1,000 <CURRENCY> USDOLLARS <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> MAR-31-1997 <PERIOD-START> APR-01-1996 <PERIOD-END> MAR-31-1997 <EXCHANGE-RATE> 1,000 <CASH> 44,225 <SECURITIES> 10,833 <RECEIVABLES> 35,771 <ALLOWANCES> (1,055) <INVENTORY> 11,837 <CURRENT-ASSETS> 109,695 <PP&E> 308,321 <DEPRECIATION> (53,013) <TOTAL-ASSETS> 373,389 <CURRENT-LIABILITIES> 37,868 <BONDS> 230,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 92,125 <OTHER-SE> 3,317 <TOTAL-LIABILITY-AND-EQUITY> 373,389 <SALES> 263,209 <TOTAL-REVENUES> 263,209 <CGS> 156,277 <TOTAL-COSTS> 156,277 <OTHER-EXPENSES> 17,615 <LOSS-PROVISION> 60 <INTEREST-EXPENSE> 3,329 <INCOME-PRETAX> 85,988 <INCOME-TAX> 25,400 <INCOME-CONTINUING> 60,588 <DISCONTINUED> 0 <EXTRAORDINARY> 1,157 <CHANGES> 0 <NET-INCOME> 61,745 <EPS-PRIMARY> 1.40 <EPS-DILUTED> 1.35