<ARTICLE> 5 <MULTIPLIER> 1 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> JUN-30-1998 <PERIOD-START> JUL-01-1997 <PERIOD-END> DEC-31-1997 <EXCHANGE-RATE> 1 <CASH> 10,924,201 <SECURITIES> 876,336 <RECEIVABLES> 2,310,719 <ALLOWANCES> 0 <INVENTORY> 243,083 <CURRENT-ASSETS> 14,354,339 <PP&E> 44,441,323 <DEPRECIATION> 18,881,159 <TOTAL-ASSETS> 40,419,947 <CURRENT-LIABILITIES> 2,022,770 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 249,802 <OTHER-SE> 17,501,848 <TOTAL-LIABILITY-AND-EQUITY> 40,419,947 <SALES> 8,120,963 <TOTAL-REVENUES> 9,049,104 <CGS> 0 <TOTAL-COSTS> 6,786,409 <OTHER-EXPENSES> 940,173 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 14,642 <INCOME-PRETAX> 1,307,880 <INCOME-TAX> 771,709 <INCOME-CONTINUING> 536,171 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 536,171 <EPS-PRIMARY> 0.02 <EPS-DILUTED> 0.02