<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary information extracted from the consolidated
balance sheet and consolidated statements of income found on pages F-3 and F-4
of the Company's 10-K and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             DEC-31-1997
<PERIOD-END>                               DEC-31-1995             DEC-31-1996             DEC-31-1997
<CASH>                                           4,531                  25,710                  24,285
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   32,377                  68,665                 112,796
<ALLOWANCES>                                       937                   3,188                   5,099
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                52,251                  99,353                 148,758
<PP&E>                                          45,740                  93,894                 172,430
<DEPRECIATION>                                  20,725                  34,785                  51,830
<TOTAL-ASSETS>                                 100,960                 211,684                 385,880
<CURRENT-LIABILITIES>                           28,069                  62,517                 109,213
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                            51                      59                      63
<OTHER-SE>                                           0                       0                       0
<TOTAL-LIABILITY-AND-EQUITY>                   100,960                 211,684                 385,880
<SALES>                                        187,215                 312,750                 491,474
<TOTAL-REVENUES>                               187,215                 312,750                 491,474
<CGS>                                          101,617                 163,717                 270,942
<TOTAL-COSTS>                                  205,415                 284,412                 472,212
<OTHER-EXPENSES>                                 (118)                   6,956                   (126)
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,315                   1,335                   5,657
<INCOME-PRETAX>                               (18,784)                  21,155                  14,292
<INCOME-TAX>                                   (6,593)                  10,221                  11,306
<INCOME-CONTINUING>                                  0                       0                       0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                  (13,453)                  10,857                   2,812
<EPS-PRIMARY>                                    (.33)                     .19                     .05
<EPS-DILUTED>                                    (.29)                     .16                     .04



</TABLE>