<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
This schedule contains summary consolidated financial information extracted from
the Company's Form 10-Q/A-2 for the six-month period ended June 30, 2000 and is
qualified in its entirety by reference to such Form 10-Q/A-2.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 96,458,337
<SECURITIES> 0
<RECEIVABLES> 143,980,362
<ALLOWANCES> 2,312,322
<INVENTORY> 0
<CURRENT-ASSETS> 254,820,631
<PP&E> 264,708,073
<DEPRECIATION> 120,673,048
<TOTAL-ASSETS> 437,214,931
<CURRENT-LIABILITIES> 108,836,309
<BONDS> 0
0
0
<COMMON> 430,362
<OTHER-SE> 241,846,084
<TOTAL-LIABILITY-AND-EQUITY> 437,214,931
<SALES> 317,178,684
<TOTAL-REVENUES> 317,178,684
<CGS> 0
<TOTAL-COSTS> 200,816,736
<OTHER-EXPENSES> 109,779,399
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 2,328,291
<INCOME-PRETAX> 88,422,377
<INCOME-TAX> 26,826,592
<INCOME-CONTINUING> 61,594,785
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 61,594,785
<EPS-BASIC> 1.46
<EPS-DILUTED> 1.45
</TABLE>