<ARTICLE> 5
<RESTATED>

                                                                                            

<PERIOD-TYPE>                   6-MOS                   3-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-2000             DEC-31-1999             DEC-31-1999
<PERIOD-END>                               JUN-30-2000             MAR-31-2000             JUN-30-1999             MAR-31-1999
<CASH>                                           9,900                   4,800                  20,600                  11,000
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                  298,500                 215,600                 235,700                  86,500
<ALLOWANCES>                                         0                       0                       0                       0
<INVENTORY>                                      9,200                  11,600                   7,200                   9,400
<CURRENT-ASSETS>                               367,400                 271,800                 280,100                 226,900
<PP&E>                                       6,673,300               6,448,600               6,179,300               6,300,900
<DEPRECIATION>                               4,152,500               4,052,300               3,974,000               4,064,300
<TOTAL-ASSETS>                               2,972,100               2,747,300               2,560,800               2,532,700
<CURRENT-LIABILITIES>                          416,300                 333,500                 228,400                 225,500
<BONDS>                                        963,800                 939,900               1,248,000               1,276,100
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                         1,000                   1,000                   1,000                   1,000
<OTHER-SE>                                   1,010,700                 877,300                 669,200                 626,200
<TOTAL-LIABILITY-AND-EQUITY>                 2,972,100               2,747,300               2,560,800               2,532,700
<SALES>                                      1,351,800                 596,900                 813,400                 353,800
<TOTAL-REVENUES>                             1,383,400                 610,500                 855,700                 372,000
<CGS>                                          353,400                 172,800                 335,100                 172,600
<TOTAL-COSTS>                                  470,500                 241,400                 420,400                 211,600
<OTHER-EXPENSES>                               589,200                 258,500                 334,600                 132,600
<LOSS-PROVISION>                                     0                       0                       0                       0
<INTEREST-EXPENSE>                              31,600                  14,700                  40,100                  20,500
<INCOME-PRETAX>                                260,500                  82,400                  34,600                 (5,400)
<INCOME-TAX>                                    47,300                   5,000                (32,700)                (24,400)
<INCOME-CONTINUING>                            213,200                  77,400                  67,300                  19,000
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                   213,200                  77,400                  67,300                  19,000
<EPS-BASIC>                                       2.18                    0.79                    0.69                    0.20
<EPS-DILUTED>                                     2.15                    0.78                    0.68                    0.19