<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997             MAR-31-1997
<PERIOD-END>                               MAR-31-1997             MAR-31-1997
<CASH>                                       6,733,730               6,733,730
<SECURITIES>                                         0                       0
<RECEIVABLES>                                6,391,244               6,391,244
<ALLOWANCES>                                   271,493                 271,493
<INVENTORY>                                  2,179,592               2,179,592
<CURRENT-ASSETS>                            16,266,856              16,266,856
<PP&E>                                      39,928,824              39,928,824
<DEPRECIATION>                              17,839,752              17,839,752
<TOTAL-ASSETS>                              38,780,672              38,780,672
<CURRENT-LIABILITIES>                        5,540,215               5,540,215
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        44,158                  44,158
<OTHER-SE>                                  31,328,347              31,328,347
<TOTAL-LIABILITY-AND-EQUITY>                38,780,672              38,780,672
<SALES>                                      9,426,000              38,000,597
<TOTAL-REVENUES>                             9,426,000              38,000,597
<CGS>                                        5,967,000              23,863,297
<TOTAL-COSTS>                                5,967,000              23,863,297
<OTHER-EXPENSES>                                     0                 (7,562)
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                              2,084,000               8,381,227
<INCOME-TAX>                                   720,000               3,056,440
<INCOME-CONTINUING>                          1,363,787               5,324,787
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                 1,363,787               5,324,787
<EPS-PRIMARY>                                     0.29                    1.11
<EPS-DILUTED>                                     0.29                    1.11