<ARTICLE> 5
<LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 
FORM 10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL 
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998
<PERIOD-START>                             JAN-01-1999             JAN-01-1998
<PERIOD-END>                               MAR-31-1999             MAR-31-1998
<CASH>                                           2,463                  13,526
<SECURITIES>                                         0                       0
<RECEIVABLES>                                   16,391                   7,323
<ALLOWANCES>                                     (577)                   (436)
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                     0                       0
<PP&E>                                       1,283,228                 978,991
<DEPRECIATION>                               (151,939)               (127,075)
<TOTAL-ASSETS>                               1,178,821                 912,709
<CURRENT-LIABILITIES>                                0                       0
<BONDS>                                        459,836                 296,959
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           276                     267
<OTHER-SE>                                     475,027                 455,739
<TOTAL-LIABILITY-AND-EQUITY>                 1,178,821                 912,709
<SALES>                                              0                       0
<TOTAL-REVENUES>                                37,550                  29,353
<CGS>                                                0                       0
<TOTAL-COSTS>                                   18,011                  13,777
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               5,759                   4,786
<INCOME-PRETAX>                                 13,780                  10,790
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                             13,780                  10,790
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     9,910<F1>               8,879
<EPS-PRIMARY>                                     0.36                    0.35
<EPS-DILUTED>                                     0.36                    0.35
<FN>
<F1>NET INCOME IS AFTER MINORITY INTERESTS OF ($3,870).
</FN>