
<TABLE> <S> <C>

<ARTICLE> 5                                                Exhibit 27
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                         185,005
<SECURITIES>                                         0
<RECEIVABLES>                                  270,603
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               486,430
<PP&E>                                         464,510
<DEPRECIATION>                                 278,457
<TOTAL-ASSETS>                               1,036,068
<CURRENT-LIABILITIES>                          446,315
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           571
<OTHER-SE>                                     453,375
<TOTAL-LIABILITY-AND-EQUITY>                 1,036,068
<SALES>                                              0
<TOTAL-REVENUES>                             1,358,644
<CGS>                                                0
<TOTAL-COSTS>                                1,330,489
<OTHER-EXPENSES>                                   809
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             (3,148)
<INCOME-PRETAX>                                 30,494
<INCOME-TAX>                                    14,650
<INCOME-CONTINUING>                             15,844
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,844
<EPS-PRIMARY>                                     0.28
<EPS-DILUTED>                                     0.28
        

</TABLE>
