<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,
1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                    $ 31,531,686
<SECURITIES>                                   147,114
<RECEIVABLES>                               45,949,743
<ALLOWANCES>                                         0
<INVENTORY>                                 16,400,477
<CURRENT-ASSETS>                            96,891,361
<PP&E>                                      89,777,983
<DEPRECIATION>                              39,107,236
<TOTAL-ASSETS>                             225,677,572
<CURRENT-LIABILITIES>                       62,291,124
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                    18,166,996
<OTHER-SE>                                  96,454,935
<TOTAL-LIABILITY-AND-EQUITY>               225,677,572
<SALES>                                    239,329,223
<TOTAL-REVENUES>                           239,329,223
<CGS>                                      136,292,528
<TOTAL-COSTS>                              136,292,528
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             867,400
<INCOME-PRETAX>                             41,276,659
<INCOME-TAX>                                16,260,957
<INCOME-CONTINUING>                         25,015,702
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                25,015,702
<EPS-BASIC>                                       1.58
<EPS-DILUTED>                                     1.54