<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1999 AND DECEMBER 31, 1998 AND THE STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JAN-01-1999
<PERIOD-END> DEC-31-1999
<CASH> 67,071
<SECURITIES> 0
<RECEIVABLES> 129,649
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 196,720
<PP&E> 1,482,710
<DEPRECIATION> 9,965,437
<TOTAL-ASSETS> 1,679,430
<CURRENT-LIABILITIES> 38,017
<BONDS> 0
0
0
<COMMON> 0
<OTHER-SE> 1,641,413
<TOTAL-LIABILITY-AND-EQUITY> 1,679,430
<SALES> 995,456
<TOTAL-REVENUES> 995,456
<CGS> 0
<TOTAL-COSTS> 0
<OTHER-EXPENSES> 707,205
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 0
<INCOME-TAX> 0
<INCOME-CONTINUING> 288,251
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 288,251
<EPS-BASIC> 48.29
<EPS-DILUTED> 48.29
</TABLE>