<TABLE> <S> <C>



<ARTICLE>                     5
<RESTATED>

       
<S>                                           <C>               <C>                 <C>
<PERIOD-TYPE>                                        3-MOS       6-MOS                 9-MOS
<FISCAL-YEAR-END>                              DEC-31-1997       DEC-31-1997          DEC-31-1997
<PERIOD-START>                                 JAN-01-1997       JAN-01-1997          JAN-01-1997 
<PERIOD-END>                                   MAR-31-1997       JUN-30-1997          SEP-30-1997
<CASH>                                         $ 3,306,140       $36,342,099          $35,428,093
<SECURITIES>                                             0                 0                    0
<RECEIVABLES>                                    2,750,667         4,428,877            6,217,953
<ALLOWANCES>                                         6,000            44,289               62,176
<INVENTORY>                                        312,793           413,228              468,680
<CURRENT-ASSETS>                                 6,563,720        41,335,348              268,857
<PP&E>                                          24,209,043        25,286,457           28,329,551
<DEPRECIATION>                                   3,583,918         4,007,183            4,405,241
<TOTAL-ASSETS>                                  27,462,534        62,697,306           66,326,189
<CURRENT-LIABILITIES>                            6,622,477         2,121,119            1,790,770
<BONDS>                                                  0                 0                    0
<PREFERRED-MANDATORY>                                    0                 0                    0
<PREFERRED>                                              0                 0                    0
<COMMON>                                           118,435           143,994              145,037
<OTHER-SE>                                               0                 0                    0
<TOTAL-LIABILITY-AND-EQUITY>                    27,462,534        62,697,306           66,326,189
<SALES>                                          4,107,358        10,279,857           17,297,364
<TOTAL-REVENUES>                                 4,107,358        10,279,857           17,297,364
<CGS>                                            1,145,361         2,704,701            4,284,908
<TOTAL-COSTS>                                    2,234,854         5,315,284            8,086,126
<OTHER-EXPENSES>                                    16,197           344,017              843,449
<LOSS-PROVISION>                                         0                 0                    0
<INTEREST-EXPENSE>                                   6,629            14,621               18,515
<INCOME-PRETAX>                                  1,788,701         5,308,590           10,054,687
<INCOME-TAX>                                       679,707         2,017,264            3,820,781
<INCOME-CONTINUING>                              1,108,994         3,291,326            6,233,906
<DISCONTINUED>                                         0                   0                    0
<EXTRAORDINARY>                                        0                   0                    0
<CHANGES>                                              0                   0                    0
<NET-INCOME>                                     1,108,994         3,291,326            6,233,906           
<EPS-PRIMARY>                                          .09               .24                  .44
<EPS-DILUTED>                                          .09               .24                  .44
        


</TABLE>