<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED SEPTEMBER 30,
2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                    $ 29,150,118
<SECURITIES>                                 1,321,226
<RECEIVABLES>                               47,286,580
<ALLOWANCES>                               (2,467,619)
<INVENTORY>                                 16,849,446
<CURRENT-ASSETS>                            94,832,790
<PP&E>                                      94,107,498
<DEPRECIATION>                            (45,640,252)
<TOTAL-ASSETS>                             220,665,450
<CURRENT-LIABILITIES>                       46,832,142
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                    18,166,996
<OTHER-SE>                                 108,688,713
<TOTAL-LIABILITY-AND-EQUITY>               220,665,450
<SALES>                                    262,364,902
<TOTAL-REVENUES>                           262,364,902
<CGS>                                      144,276,094
<TOTAL-COSTS>                              144,276,094
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,487,883
<INCOME-PRETAX>                             45,938,350
<INCOME-TAX>                                18,015,431
<INCOME-CONTINUING>                         27,922,919
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                27,912,919
<EPS-BASIC>                                       1.80
<EPS-DILUTED>                                     1.76