<ARTICLE> 5
<LEGEND>
FINANCIAL DATA SCHEDULE-EXHIBIT 27-THIS SCHEDULE CONTAINS SUMMARY FINANCIAL
INFORMATION EXTRACTED FROM THE CONSOLIDATED STATEMENTS OF INCOME AND THE
CONSOLIDATED BALANCE SHEETS ON PAGES 34 AND 35 OF THE COMPANY'S ANNUAL REPORT TO
STOCKHOLDERS FOR THE YEAR ENDED MAY 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          MAY-31-1998
<PERIOD-START>                             JUN-01-1997
<PERIOD-END>                               MAY-31-1998
<CASH>                                         229,565
<SECURITIES>                                         0
<RECEIVABLES>                                2,004,832
<ALLOWANCES>                                    61,409
<INVENTORY>                                    364,714
<CURRENT-ASSETS>                             2,880,132
<PP&E>                                      12,463,874
<DEPRECIATION>                               6,528,824
<TOTAL-ASSETS>                               9,686,060
<CURRENT-LIABILITIES>                        2,803,839
<BONDS>                                      1,385,180
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        14,741
<OTHER-SE>                                   3,946,489
<TOTAL-LIABILITY-AND-EQUITY>                 9,686,060
<SALES>                                              0
<TOTAL-REVENUES>                            15,872,810
<CGS>                                                0
<TOTAL-COSTS>                               14,862,150
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             124,413
<INCOME-PRETAX>                                899,518
<INCOME-TAX>                                   401,363
<INCOME-CONTINUING>                            498,155
<DISCONTINUED>                                   4,875
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   503,030
<EPS-PRIMARY>                                     3.43
<EPS-DILUTED>                                     3.37