<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                          17,462
<SECURITIES>                                   163,155
<RECEIVABLES>                                  808,585
<ALLOWANCES>                                  (18,561)
<INVENTORY>                                     50,053
<CURRENT-ASSETS>                                     0
<PP&E>                                       9,444,144
<DEPRECIATION>                             (1,525,208)
<TOTAL-ASSETS>                              10,123,285
<CURRENT-LIABILITIES>                                0
<BONDS>                                      6,700,837
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,083
<OTHER-SE>                                   1,501,698
<TOTAL-LIABILITY-AND-EQUITY>                10,123,285
<SALES>                                              0
<TOTAL-REVENUES>                             2,200,344
<CGS>                                                0
<TOTAL-COSTS>                                1,808,031
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                 6,848
<INTEREST-EXPENSE>                             156,497
<INCOME-PRETAX>                                228,968
<INCOME-TAX>                                    92,304
<INCOME-CONTINUING>                            136,664
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   136,664
<EPS-BASIC>                                       1.27
<EPS-DILUTED>                                     1.26