<ARTICLE> 5 <PERIOD-TYPE> 3-MOS 12-MOS <FISCAL-YEAR-END> MAR-31-1998 MAR-31-1998 <PERIOD-END> MAR-31-1998 MAR-31-1998 <CASH> 5,523,416 5,523,416 <SECURITIES> 0 0 <RECEIVABLES> 7,395,086 7,395,086 <ALLOWANCES> 278,495 278,495 <INVENTORY> 2,783,070 2,783,070 <CURRENT-ASSETS> 16,536,186 16,536,186 <PP&E> 55,809,950 55,809,950 <DEPRECIATION> 22,235,256 22,235,256 <TOTAL-ASSETS> 51,158,162 51,158,162 <CURRENT-LIABILITIES> 9,900,591 9,900,591 <BONDS> 0 0 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 44,640 44,640 <OTHER-SE> 37,721,692 37,721,692 <TOTAL-LIABILITY-AND-EQUITY> 37,766,332 37,766,332 <SALES> 12,992,054 46,721,054 <TOTAL-REVENUES> 12,992,054 46,721,054 <CGS> 8,439,531 29,744,531 <TOTAL-COSTS> 8,439,531 29,744,531 <OTHER-EXPENSES> 0 (254,014) <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 0 0 <INCOME-PRETAX> 2,681,064 9,788,064 <INCOME-TAX> 999,564 3,687,564 <INCOME-CONTINUING> 1,681,501 6,100,501 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 1,681,501 6,100,501 <EPS-PRIMARY> 0.38 1.37<F1> <EPS-DILUTED> 0.34 1.25 <FN> <F1>For Purposes of This Exhibit, Primary means Basic. </FN>