<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          MAR-31-2000
<PERIOD-END>                               DEC-31-1999
<CASH>                                           9,400
<SECURITIES>                                         0
<RECEIVABLES>                                  336,900
<ALLOWANCES>                                         0
<INVENTORY>                                    363,100
<CURRENT-ASSETS>                                     0
<PP&E>                                       1,255,800
<DEPRECIATION>                               (514,400)
<TOTAL-ASSETS>                               1,640,000
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        43,700
<OTHER-SE>                                     963,600
<TOTAL-LIABILITY-AND-EQUITY>                 1,640,000
<SALES>                                              0
<TOTAL-REVENUES>                             2,094,200
<CGS>                                                0
<TOTAL-COSTS>                                1,735,400
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              15,800
<INCOME-PRETAX>                                209,600
<INCOME-TAX>                                    78,000
<INCOME-CONTINUING>                            131,600
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   131,600
<EPS-BASIC>                                       3.31
<EPS-DILUTED>                                     3.29