<ARTICLE> 5 <MULTIPLIER> 1 <CURRENCY> U.S. Dollars <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1 <CASH> 119,497 <SECURITIES> 0 <RECEIVABLES> 3,200 <ALLOWANCES> 1,600 <INVENTORY> 0 <CURRENT-ASSETS> 121,097 <PP&E> 1,333,626 <DEPRECIATION> 388,122 <TOTAL-ASSETS> 1,066,601 <CURRENT-LIABILITIES> 20,573 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 1,046,028 <TOTAL-LIABILITY-AND-EQUITY> 1,066,601 <SALES> 0 <TOTAL-REVENUES> 118,647 <CGS> 0 <TOTAL-COSTS> 66,585 <OTHER-EXPENSES> 37,002 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 15,060 <INCOME-TAX> 0 <INCOME-CONTINUING> 15,060 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 15,060 <EPS-PRIMARY> 3.40 <EPS-DILUTED> 3.40