<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENTS OF INCOME AND CONSOLIDATED BALANCE SHEETS ON PAGES 45-47
OF THE COMPANY'S 10-K FOR THE YEAR ENDED MAY 31, 2000 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          MAY-31-2000
<PERIOD-START>                             JUN-01-1999
<PERIOD-END>                               MAY-31-2000
<CASH>                                          67,959
<SECURITIES>                                         0
<RECEIVABLES>                                2,633,015
<ALLOWANCES>                                    85,972
<INVENTORY>                                    255,291
<CURRENT-ASSETS>                             3,284,744
<PP&E>                                      14,742,543
<DEPRECIATION>                               7,659,016
<TOTAL-ASSETS>                              11,527,111
<CURRENT-LIABILITIES>                        2,891,026
<BONDS>                                      1,776,253
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        29,857
<OTHER-SE>                                   4,755,386
<TOTAL-LIABILITY-AND-EQUITY>                11,527,111
<SALES>                                              0
<TOTAL-REVENUES>                            18,256,945
<CGS>                                                0
<TOTAL-COSTS>                               17,035,871
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             106,060
<INCOME-PRETAX>                              1,137,740
<INCOME-TAX>                                   449,404
<INCOME-CONTINUING>                            688,336
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   688,336
<EPS-BASIC>                                      2.360
<EPS-DILUTED>                                    2.320