<ARTICLE>                     5

                                                                         
<PERIOD-TYPE>                               12-Mos            12-Mos              12-Mos
<FISCAL-YEAR-END>                           Dec-31-1997          Dec-31-1998       Dec-31-1999
<PERIOD-START>                              Jan-01-1997          Jan-01-1998       Jan-01-1999
<PERIOD-END>                                Dec-31-1997          Dec-31-1998       Dec-31-1999
<CASH>                                            1,176                3,665             3,176
<SECURITIES>                                          0                    0                 0
<RECEIVABLES>                                    14,797               17,535            27,677
<ALLOWANCES>                                        908                  700               921
<INVENTORY>                                         842                1,334             1,624
<CURRENT-ASSETS>                                 17,121               23,917            35,483
<PP&E>                                           65,044               88,801           138,523
<DEPRECIATION>                                   11,797               16,981            22,298
<TOTAL-ASSETS>                                  113,417              176,201           249,204
<CURRENT-LIABILITIES>                            15,486               16,974            27,668
<BONDS>                                          50,788               86,465           137,363
<PREFERRED-MANDATORY>                                 0                    0                 0
<PREFERRED>                                           0                    0                 0
<COMMON>                                         27,120               41,148            46,700
<OTHER-SE>                                       14,047               23,514            23,441
<TOTAL-LIABILITY-AND-EQUITY>                    113,417              176,201           249,204
<SALES>                                         129,182              171,259           214,719
<TOTAL-REVENUES>                                129,182              171,259           214,719
<CGS>                                            80,946              106,901           134,744
<TOTAL-COSTS>                                   115,848              151,194           188,670
<OTHER-EXPENSES>                                      0                    0                 0
<LOSS-PROVISION>                                      0                    0                 0
<INTEREST-EXPENSE>                                3,021                4,812             8,653
<INCOME-PRETAX>                                  10,947               15,884            19,124
<INCOME-TAX>                                      7,011                5,606             7,100
<INCOME-CONTINUING>                               3,936               10,278            12,024
<DISCONTINUED>                                        0                    0                 0
<EXTRAORDINARY>                                       0                    0                 0
<CHANGES>                                             0                    0                 0
<NET-INCOME>                                      3,936               10,278            12,024
<EPS-BASIC>                                        0.58                 0.78              0.88
<EPS-DILUTED>                                      0.56                 0.76              0.86