<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEETS AT 6-30-00 AND CONDENSED CONSOLIDATED
STATEMENT OF EARNINGS FOR THE 3 MONTHS ENDED 6-30-00 AND RELATED NOTES TO
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS CONTAINED IN THE COMPANY'S 2ND
QTR 2000 10Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 128,603
<SECURITIES> 243
<RECEIVABLES> 315,832
<ALLOWANCES> 10,632
<INVENTORY> 0
<CURRENT-ASSETS> 454,470
<PP&E> 180,399
<DEPRECIATION> 75,704
<TOTAL-ASSETS> 589,123
<CURRENT-LIABILITIES> 274,190
<BONDS> 0
0
0
<COMMON> 512
<OTHER-SE> 314,421
<TOTAL-LIABILITY-AND-EQUITY> 589,123
<SALES> 0
<TOTAL-REVENUES> 753,540
<CGS> 0
<TOTAL-COSTS> 509,954
<OTHER-EXPENSES> 194,947
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 50,423
<INCOME-TAX> 18,968
<INCOME-CONTINUING> 0
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 31,455
<EPS-BASIC> 0.62
<EPS-DILUTED> 0.58
</TABLE>