<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
RESTATED FINANCIAL DATA SCHEDULE (AS A RESULT OF CHANGE IN ACCOUNTING PRINCIPLE
-- SFAS 128)
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1000
       
<S>                             <C>            <C>            <C>
<PERIOD-TYPE>                   12-MOS         3-MOS          6-MOS
<FISCAL-YEAR-END>               MAR-31-1997    MAR-31-1998    MAR-31-1998
<PERIOD-END>                    MAR-31-1997    JUN-30-1997    SEP-30-1997
<CASH>                                63981          51156          10614
<SECURITIES>                              0              0              0
<RECEIVABLES>                         51762          57800         106373
<ALLOWANCES>                              0              0              0
<INVENTORY>                               0              0              0
<CURRENT-ASSETS>                     151642         136147         135152
<PP&E>                               243915         287719         389298
<DEPRECIATION>                            0              0              0
<TOTAL-ASSETS>                       442687         440172         538475
<CURRENT-LIABILITIES>                 47915          54886          76170
<BONDS>                               40947          40900          97451
<PREFERRED-MANDATORY>                     0              0              0
<PREFERRED>                               0              0              0
<COMMON>                                454            453            912
<OTHER-SE>                           311773         322334         338344
<TOTAL-LIABILITY-AND-EQUITY>         422687         440172         538475
<SALES>                                   0              0              0
<TOTAL-REVENUES>                     229142          63176         171948
<CGS>                                     0              0              0
<TOTAL-COSTS>                        165889          42337         113252
<OTHER-EXPENSES>                          0              0              0
<LOSS-PROVISION>                          0              0              0
<INTEREST-EXPENSE>                     1358            130            480
<INCOME-PRETAX>                       48475          16321          47506
<INCOME-TAX>                          14543           6202          18052
<INCOME-CONTINUING>                   33932          10119          29454
<DISCONTINUED>                            0              0              0
<EXTRAORDINARY>                           0              0              0
<CHANGES>                                 0              0              0
<NET-INCOME>                          33932          10119          29454
<EPS-PRIMARY>                           .44<F1>        .11<F3>        .32
<EPS-DILUTED>                           .42<F2>        .11<F4>        .31
<FN>
<F1>EPS amounts have been restated for a stock split which occurred on 
    October 27,1997.
<F2>EPS amounts have been restated for a stock split which occurred on 
    October 27,1997.
<F3>EPS amounts have been restated for a stock split which occurred on 
    October 27,1997.
<F4>EPS amounts have been restated for a stock split which occurred on 
    October 27,1997.
</FN>
        

</TABLE>