<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
CONSOLIDATED STATEMENTS OF INCOME AND CONSOLIDATED BALANCE SHEETS ON PAGES ___
OF THE COMPANY'S FORM 10-K FOR THE YEAR ENDED MAY 31, 1996 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAY-31-1996
<PERIOD-START>                             JUN-01-1995
<PERIOD-END>                               MAY-31-1996
<CASH>                                          93,419
<SECURITIES>                                         0
<RECEIVABLES>                                1,302,408
<ALLOWANCES>                                    30,809
<INVENTORY>                                    222,110
<CURRENT-ASSETS>                             1,728,261
<PP&E>                                       8,678,517
<DEPRECIATION>                               4,561,916
<TOTAL-ASSETS>                               6,698,971
<CURRENT-LIABILITIES>                        1,618,397
<BONDS>                                      1,325,277
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,689
<OTHER-SE>                                   2,570,450
<TOTAL-LIABILITY-AND-EQUITY>                 6,698,971
<SALES>                                              0
<TOTAL-REVENUES>                            10,273,619
<CGS>                                                0
<TOTAL-COSTS>                                9,649,795
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              95,599
<INCOME-PRETAX>                                539,959
<INCOME-TAX>                                   232,182
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   307,777
<EPS-PRIMARY>                                     5.39
<EPS-DILUTED>                                     5.39