<TABLE> <S> <C>

<ARTICLE> 5

<S>                                            <C>               <C>               <C>               <C>              <C>
<PERIOD-TYPE>                                         YEAR              YEAR              YEAR              YEAR              YEAR
<FISCAL-YEAR-END>                              DEC-31-1997       DEC-31-1996       DEC-31-1995       DEC-31-1994       DEC-31-1993
<PERIOD-END>                                   DEC-31-1997       DEC-31-1996       DEC-31-1995       DEC-31-1994       DEC-31-1993
<CASH>                                           1,240,992         2,430,937           757,381         3,588,037         6,630,819
<SECURITIES>                                     1,050,718         1,171,079         3,838,614         1,899,268                 0
<RECEIVABLES>                                       19,443            23,125            59,367            31,962            29,950
<ALLOWANCES>                                             0                 0                 0                 0                 0
<INVENTORY>                                              0                 0                 0                 0                 0
<CURRENT-ASSETS>                                 2,365,258         3,225,123         4,157,718         4,435,582         7,614,428
<PP&E>                                          27,522,596        27,453,777        27,290,822        27,155,538        27,065,131
<DEPRECIATION>                                  (6,330,294)       (5,664,440)       (4,989,699)       (4,285,544)       (3,505,401)
<TOTAL-ASSETS>                                  26,439,286        28,106,422        29,795,170        31,262,819        33,356,335
<CURRENT-LIABILITIES>                            1,421,530         1,421,530         1,399,678         1,280,057         1,157,141
<BONDS>                                                  0                 0                 0                 0                 0
<COMMON>                                                 0                 0                 0                 0                 0
<PREFERRED-MANDATORY>                                    0                 0                 0                 0                 0
<PREFERRED>                                              0                 0                 0                 0                 0
<OTHER-SE>                                      23,500,432        25,378,723        27,103,805        28,578,559        30,418,340
<TOTAL-LIABILITY-AND-EQUITY>                    26,439,286        28,106,422        29,795,170        31,262,819        33,356,335
<SALES>                                                  0                 0                 0                 0                 0
<TOTAL-REVENUES>                                 5,494,371         5,276,996         5,158,118         4,964,476         5,328,844
<CGS>                                                    0                 0                 0                 0                 0
<TOTAL-COSTS>                                            0                 0                 0                 0                 0
<OTHER-EXPENSES>                                 4,097,678         3,678,376         3,432,024         3,526,029         3,674,507
<LOSS-PROVISION>                                         0                 0                 0                 0                 0
<INTEREST-EXPENSE>                                       0                 0                 0                 0                 0
<INCOME-PRETAX>                                  1,397,550         1,599,228         1,728,314         1,442,029         1,660,580
<INCOME-TAX>                                             0                 0                 0                 0                 0
<INCOME-CONTINUING>                                      0                 0                 0                 0                 0
<DISCONTINUED>                                           0                 0                 0                 0                 0
<EXTRAORDINARY>                                          0                 0                 0                 0                 0
<CHANGES>                                                0                 0                 0                 0                 0
<NET-INCOME>                                     1,397,550         1,599,228         1,728,314         1,442,029         1,660,580
<EPS-PRIMARY>                                            0                 0                 0                 0                 0
<EPS-DILUTED>                                            0                 0                 0                 0                 0


</TABLE>