<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED STATEMENT OF INCOME FOR THE YEAR ENDED JUNE 30, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> JUN-30-1998 <PERIOD-START> JUL-01-1997 <PERIOD-END> JUN-30-1998 <CASH> 755,904 <SECURITIES> 19,332,801 <RECEIVABLES> 1,823,468 <ALLOWANCES> 205,318 <INVENTORY> 662,399 <CURRENT-ASSETS> 47,220,556 <PP&E> 33,989,277 <DEPRECIATION> 23,304,941 <TOTAL-ASSETS> 78,380,114 <CURRENT-LIABILITIES> 3,591,042 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 4,138,462 <OTHER-SE> 67,015,610 <TOTAL-LIABILITY-AND-EQUITY> 78,380,114 <SALES> 20,448,167 <TOTAL-REVENUES> 25,045,272 <CGS> 14,536,956 <TOTAL-COSTS> 24,146,292 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 26,243,797 <INCOME-TAX> 10,180,000 <INCOME-CONTINUING> 16,063,797 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 16,063,797 <EPS-PRIMARY> 14.10 <EPS-DILUTED> 13.98