
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                          27,971
<SECURITIES>                                         0
<RECEIVABLES>                                   82,601
<ALLOWANCES>                                         0
<INVENTORY>                                     72,832
<CURRENT-ASSETS>                               184,173
<PP&E>                                         521,619
<DEPRECIATION>                                  68,661
<TOTAL-ASSETS>                                 685,370
<CURRENT-LIABILITIES>                          119,996
<BONDS>                                        206,151
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           210
<OTHER-SE>                                     236,702
<TOTAL-LIABILITY-AND-EQUITY>                   685,370
<SALES>                                         91,600
<TOTAL-REVENUES>                                92,323
<CGS>                                           67,006
<TOTAL-COSTS>                                   79,092
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 970
<INCOME-PRETAX>                                 16,883
<INCOME-TAX>                                     5,403
<INCOME-CONTINUING>                             11,463
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    11,463
<EPS-PRIMARY>                                      .57
<EPS-DILUTED>                                      .57
        

</TABLE>
