<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE QUARTER
AND SIX MONTHS ENDED DECEMBER 31, 1998 AND QUARTER AND SIX MONTHS ENDED JANUARY
31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL 
STATEMENTS.
</LEGEND>
       
<S>                                       <C>                     <C>                       <C>                     <C>          
<PERIOD-TYPE>                              3-MOS                   6-MOS                     3-MOS                   6-MOS       
<FISCAL-YEAR-END>                          JUN-30-1999             JUN-30-1999               APR-30-1998             APR-30-1998 
<PERIOD-START>                             OCT-01-1998             JUL-01-1998               NOV-01-1997             AUG-01-1997 
<PERIOD-END>                               DEC-31-1998             DEC-31-1998               JAN-31-1998             JAN-31-1998 
<CASH>                                      29,500,233              29,500,233                40,822,014              40,822,014 
<SECURITIES>                                         0                       0                         0                       0
<RECEIVABLES>                              151,058,972             151,058,972                39,186,603              39,186,603
<ALLOWANCES>                                         0                       0                         0                       0
<INVENTORY>                                318,653,064             318,653,064                63,625,882              63,625,882
<CURRENT-ASSETS>                           504,364,784             504,364,784               146,092,055             146,092,055
<PP&E>                                     395,387,936             395,387,936               172,907,920             172,907,920
<DEPRECIATION>                            (28,467,863)            (28,467,863)              (16,374,455)            (16,374,455)
<TOTAL-ASSETS>                             931,093,645             931,093,645               323,586,983             323,586,983
<CURRENT-LIABILITIES>                      196,379,010             196,379,010                47,038,227              47,038,227
<BONDS>                                    526,851,600             526,851,600               124,489,624             124,489,624
<PREFERRED-MANDATORY>                                0                       0                         0                       0
<PREFERRED>                                          0                       0                         0                       0
<COMMON>                                       304,705                 304,705                   259,394                 259,394
<OTHER-SE>                                 207,321,387             207,321,387               146,324,361             146,324,361
<TOTAL-LIABILITY-AND-EQUITY>               931,093,645             931,093,645               323,586,983             323,586,983
<SALES>                                              0                       0                         0                       0
<TOTAL-REVENUES>                           741,300,100           1,204,421,083               470,731,798           1,015,831,854
<CGS>                                                0                       0                         0                       0
<TOTAL-COSTS>                              734,033,879           1,191,584,550               466,107,411           1,006,212,241
<OTHER-EXPENSES>                                     0                       0                         0                       0
<LOSS-PROVISION>                                     0                       0                         0                       0
<INTEREST-EXPENSE>                           7,175,000               9,650,264                 2,166,204               3,734,981
<INCOME-PRETAX>                              (469,670)               2,794,134                 2,818,021               6,685,493
<INCOME-TAX>                                 (173,201)<F1>           1,062,000                 1,100,000               2,570,000
<INCOME-CONTINUING>                          (291,469)               1,732,134                 1,718,021               4,115,493
<DISCONTINUED>                                       0                       0                         0                       0
<EXTRAORDINARY>                                      0                       0                         0                       0
<CHANGES>                                            0                       0                         0                       0
<NET-INCOME>                                 (291,469)               1,732,134                 1,718,021               4,115,493
<EPS-PRIMARY>                                   (0.01)<F2>                0.06<F2>                  0.07<F2>               0.16<F2> 
<EPS-DILUTED>                                   (0.01)                    0.06                      0.06                    0.15
<FN>
<F1>INCOME TAX BENEFIT
<F2>REPRESENTS BASIC EARNINGS PER SHARE.
</FN>
        

</TABLE>