<ARTICLE> 5
<MULTIPLIER> 1,000
       
                                                                                            

<PERIOD-TYPE>                   YEAR                   9-MOS                   6-MOS                   3-MOS
YEAR
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996             DEC-31-1996
             DEC-31-1995
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996             JAN-01-1996
             JAN-01-1995
<PERIOD-END>                               DEC-31-1996             SEP-30-1996             JUN-30-1996             MAR-31-1996
             DEC-31-1995
<CASH>                                           2,000                   8,700                  10,000                  28,300
                   2,900
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                  326,700                 315,000                 294,800                 279,700
                 281,400
<ALLOWANCES>                                    11,700                  12,800                  12,600                  12,800
                  14,700
<INVENTORY>                                     17,300                  15,800                  10,600                  11,600
                  10,500
<CURRENT-ASSETS>                               390,600                 388,500                 367,000                 360,700
                 341,400
<PP&E>                                       1,892,800               1,859,100               1,828,400               1,790,800
               1,785,900
<DEPRECIATION>                                 907,000                 885,400                 858,600                 823,500
                 792,000
<TOTAL-ASSETS>                               1,670,900               1,631,300               1,592,400               1,583,500
               1,591,700
<CURRENT-LIABILITIES>                          512,300                 411,800                 391,100                 418,800
                 453,300
<BONDS>                                        279,500                 381,300                 384,500                 385,300
                 386,800
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                       135,100                 134,800                 134,700                 134,100
                 133,400
<OTHER-SE>                                     499,300                 450,600                 415,900                 378,700
                 344,700
<TOTAL-LIABILITY-AND-EQUITY>                 1,670,900               1,631,300               1,592,400               1,583,500
               1,591,700
<SALES>                                              0                       0                       0                       0
                       0
<TOTAL-REVENUES>                             1,573,700               1,141,300                 738,100                 362,100
               1,336,100
<CGS>                                                0                       0                       0                       0
                       0
<TOTAL-COSTS>                                1,267,200                 606,000                 389,700                 187,900
                       0
<OTHER-EXPENSES>                                     0                 313,300                 201,300                 101,600
               1,289,400
<LOSS-PROVISION>                                 9,000                   5,700                   3,300                   2,500
                   8,500
<INTEREST-EXPENSE>                              33,900                  25,100                  18,000                   9,600
                  52,800
<INCOME-PRETAX>                                284,700                 206,300                 133,600                  64,500
                (19,600)
<INCOME-TAX>                                    99,700                  72,900                  47,100                  22,800
                   5,700
<INCOME-CONTINUING>                            185,000                 133,400                  86,500                  41,700
                (25,300)
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                 (7,000)
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                   185,000                 133,400                  86,500                  41,700
                (32,300)
<EPS-PRIMARY>                                     1.38                     .99                     .65                     .31
                   (.24)
<EPS-DILUTED>                                     1.35                     .97                     .63                     .31
                   (.24)