<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUN-30-1998 <CASH> 3,159,959 <SECURITIES> 0 <RECEIVABLES> 470,753 <ALLOWANCES> 73,193 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 89,219,977 <DEPRECIATION> 57,948,176 <TOTAL-ASSETS> 36,815,017 <CURRENT-LIABILITIES> 1,764,027 <BONDS> 21,135,652 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 13,915,338 <TOTAL-LIABILITY-AND-EQUITY> 36,815,017 <SALES> 0 <TOTAL-REVENUES> 19,985,317 <CGS> 0 <TOTAL-COSTS> 16,831,408 <OTHER-EXPENSES> 368,087 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 819,814 <INCOME-PRETAX> 1,966,008 <INCOME-TAX> 0 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,966,008 <EPS-PRIMARY> 18.71 <EPS-DILUTED> 18.71