<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1996 <PERIOD-END> JUN-30-1996 <CASH> 9,626 <SECURITIES> 0 <RECEIVABLES> 3,415 <ALLOWANCES> 0 <INVENTORY> 245 <CURRENT-ASSETS> 18,560 <PP&E> 154,701 <DEPRECIATION> 52,609 <TOTAL-ASSETS> 227,390 <CURRENT-LIABILITIES> 11,295 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 27,817 <OTHER-SE> 128,059 <TOTAL-LIABILITY-AND-EQUITY> 227,390 <SALES> 10,378 <TOTAL-REVENUES> 16,679 <CGS> 1,510 <TOTAL-COSTS> 1,510 <OTHER-EXPENSES> 8,186 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 603 <INCOME-PRETAX> 8,313 <INCOME-TAX> 1,519 <INCOME-CONTINUING> 6,794 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 6,794 <EPS-PRIMARY> 1.58 <EPS-DILUTED> 1.58