<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <CURRENCY> US DOLLARS <PERIOD-TYPE> 12-MOS 3-MOS 6-MOS 9-MOS <FISCAL-YEAR-END> MAY-31-1996 MAY-31-1997 MAY-31-1997 MAY-31-1997 <PERIOD-START> JUN-01-1995 JUN-01-1996 JUN-01-1996 JUN-01-1996 <PERIOD-END> MAY-31-1996 AUG-31-1996 NOV-30-1996 FEB-28-1997 <EXCHANGE-RATE> 1 1 1 1 <CASH> 30,134 27,904 36,277 37,258 <SECURITIES> 7 7 7 7 <RECEIVABLES> 93,094 87,160 95,654 103,893 <ALLOWANCES> 0 0 0 0 <INVENTORY> 65,873 72,820 84,150 94,048 <CURRENT-ASSETS> 205,273 221,605 230,710 250,323 <PP&E> 400,708 410,366 416,612 421,284 <DEPRECIATION> 260,300 268,438 270,230 271,586 <TOTAL-ASSETS> 375,890 390,562 404,501 426,367 <CURRENT-LIABILITIES> 88,739 96,082 96,523 101,727 <BONDS> 90,231 90,231 90,231 96,231 <PREFERRED-MANDATORY> 0 0 0 0 <PREFERRED> 0 0 0 0 <COMMON> 37,053 37,053 37,053 37,053 <OTHER-SE> 72,890 82,316 96,140 107,306 <TOTAL-LIABILITY-AND-EQUITY> 375,890 390,562 404,501 426,367 <SALES> 497,240 133,583 271,571 424,144 <TOTAL-REVENUES> 499,624 134,235 272,890 426,222 <CGS> 421,492 122,744 237,823 362,540 <TOTAL-COSTS> 421,492 122,744 237,823 362,540 <OTHER-EXPENSES> 0 0 0 0 <LOSS-PROVISION> 0 0 0 0 <INTEREST-EXPENSE> 11,272 2,722 5,382 8,053 <INCOME-PRETAX> 25,234 (11,865) (2,732) 10,278 <INCOME-TAX> 0 (19,680) (19,860) (19,680) <INCOME-CONTINUING> 25,234 7,815 16,948 29,958 <DISCONTINUED> 0 0 0 0 <EXTRAORDINARY> 0 0 0 0 <CHANGES> 0 0 0 0 <NET-INCOME> 25,234 7,815 16,948 29,958 <EPS-PRIMARY> 0.72 0.22 0.47 0.84 <EPS-DILUTED> 0.70 0.21 0.46 0.81