<ARTICLE>                               5      
<MULTIPLIER>                            1
<CURRENCY>                              U.S. DOLLARS
                                                                 
                                                          
<PERIOD-TYPE>                           9-MOS               9-MOS
<FISCAL-YEAR-END>                       JUN-30-1998         JUN-30-1997
<PERIOD-START>                          JUL-01-1997         JUL-01-1996
<PERIOD-END>                            MAR-31-1998         MAR-31-1997
<EXCHANGE-RATE>                         1                   1
<CASH>                                  14,408,792          12,203,348
<SECURITIES>                            0                   946,946
<RECEIVABLES>                           1,784,519           1,732,372
<ALLOWANCES>                            0                   0
<INVENTORY>                             189,415             282,397
<CURRENT-ASSETS>                        16,382,726          15,165,063
<PP&E>                                  44,608,128          70,377,381
<DEPRECIATION>                          19,716,212          28,213,108
<TOTAL-ASSETS>                          41,789,102          57,848,105
<CURRENT-LIABILITIES>                   1,927,180           2,470,482
<BONDS>                                 0                   0
<PREFERRED-MANDATORY>                   0                   0
<PREFERRED>                             0                   0
<COMMON>                                249,825             248,512
<OTHER-SE>                              17,866,393          22,481,512
<TOTAL-LIABILITY-AND-EQUITY>            41,789,102          57,848,105
<SALES>                                 11,398,364          13,965,661
<TOTAL-REVENUES>                        12,233,272          15,743,890
<CGS>                                   0                   0
<TOTAL-COSTS>                           9,221,023           11,572,188
<OTHER-EXPENSES>                        1,264,019           1,645,971
<LOSS-PROVISION>                        0                   0
<INTEREST-EXPENSE>                      21,700              40,216
<INCOME-PRETAX>                         1,726,530           2,485,515
<INCOME-TAX>                            1,017,364           1,900,292
<INCOME-CONTINUING>                     709,166             585,223
<DISCONTINUED>                          0                   0
<EXTRAORDINARY>                         0                   0
<CHANGES>                               0                   0
<NET-INCOME>                            709,166             585,223
<EPS-PRIMARY>                           0.03                0.02
<EPS-DILUTED>                           0.03                0.02