<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND> This schedule contains summary financial information extracted from
its September 30, 2000 Form 10-Q and is qualified in its entirety by reference
to such financial statements.
</LEGEND>
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-1999
<PERIOD-START> JUL-01-2000 JAN-01-2000
<PERIOD-END> SEP-30-2000 SEP-30-2000
<CASH> 1,009,781 1,009,781
<SECURITIES> 350,484 350,484
<RECEIVABLES> 408,097 408,097
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 1,768,362 1,768,362
<PP&E> 19,870,837 19,870,837
<DEPRECIATION> 5,598,311 5,598,311
<TOTAL-ASSETS> 16,040,888 16,040,888
<CURRENT-LIABILITIES> 251,252 251,252
<BONDS> 0 0
0 0
0 0
<COMMON> 0 0
<OTHER-SE> 15,789,636 15,789,636
<TOTAL-LIABILITY-AND-EQUITY> 16,040,888 16,040,888
<SALES> 758,089 1,920,832
<TOTAL-REVENUES> 775,092 1,972,008
<CGS> 0 0
<TOTAL-COSTS> 0 0
<OTHER-EXPENSES> 428,817 916,896
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> 346,275 1,055,112
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 346,275 1,055,112
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 346,275 1,055,112
<EPS-BASIC> 7.41 22.57
<EPS-DILUTED> 7.41 22.57
</TABLE>