<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>

<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   YEAR                   YEAR                   3-MOS                   6-MOS
9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             DEC-31-1996             DEC-31-1996
             DEC-31-1996
<PERIOD-START>                             JAN-01-1995             JAN-01-1996             JAN-01-1996             JAN-01-1996
             JAN-01-1996
<PERIOD-END>                               DEC-31-1995             DEC-31-1996             MAR-31-1996             JUN-30-1996
             SEP-30-1996
<CASH>                                          388571                  296671                  483195                  706566
                  138870
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                   237928                  186834                  129767                  329360
                  267374
<ALLOWANCES>                                         0                   14602                    3300                    3300
                   14602
<INVENTORY>                                      88806                   72731                   77473                  100884
                   75412
<CURRENT-ASSETS>                                824753                  657603                  795681                 1319775
                  549960
<PP&E>                                        10329735                10613222                10316657                10569910
                10573200
<DEPRECIATION>                                 1186073                 1981468                 1377502                 1566232
                 1767613
<TOTAL-ASSETS>                                 9985737                 9302132                 9751021                10338504
                 9369464
<CURRENT-LIABILITIES>                          4273336                 3475814                 3515839                 4685558
                 3908064
<BONDS>                                              0                       0                       0                       0
                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                         29393                   29614                   29393                   29494
                   29544
<OTHER-SE>                                     5683008                 5796704                 6205789                 5623452
                 5431856
<TOTAL-LIABILITY-AND-EQUITY>                   9985737                 9302132                 9751021                10338504
                 9369464
<SALES>                                        3100969                 2962714                  518673                 1518788
                 2579364
<TOTAL-REVENUES>                              17651606                17371005                 3290733                 8686995
                14256200
<CGS>                                          1580889                 1549562                  257726                  789823
                 1326297
<TOTAL-COSTS>                                 18328944                17084033                 2706619                 8656506
                14368915
<OTHER-EXPENSES>                               (13719)                 (12532)                   (920)                  (5975)
                  (6085)
<LOSS-PROVISION>                                     0                   11302                       0                       0
                   11302
<INTEREST-EXPENSE>                              225481                  228355                   62253                  115157
                  172984
<INCOME-PRETAX>                               (889100)                   71149                  522781                 (78693)
                (279614)
<INCOME-TAX>                                         0                       0                       0                       0
                       0
<INCOME-CONTINUING>                           (889100)                   71149                  522781                 (78693)
                (279614)
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                  (889100)                   71149                  522781                 (78693)
                (279614)
<EPS-PRIMARY>                                    (.30)                     .02                     .18                   (.03)
                   (.09)
<EPS-DILUTED>                                    (.30)                     .02                     .18                   (.03)
                   (.09)


</TABLE>