<ARTICLE> 5
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                      57,546,406
<SECURITIES>                                39,333,944
<RECEIVABLES>                               40,967,509
<ALLOWANCES>                                 2,942,606
<INVENTORY>                                 19,863,508
<CURRENT-ASSETS>                           157,523,691
<PP&E>                                      16,860,542
<DEPRECIATION>                               5,320,103
<TOTAL-ASSETS>                             232,878,096
<CURRENT-LIABILITIES>                       44,354,054
<BONDS>                                          8,713
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        19,273
<OTHER-SE>                                 187,482,222
<TOTAL-LIABILITY-AND-EQUITY>               232,878,096
<SALES>                                    183,685,124
<TOTAL-REVENUES>                           183,685,124
<CGS>                                      107,601,639
<TOTAL-COSTS>                              158,756,266
<OTHER-EXPENSES>                           (3,786,792)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                         (1,588,043)
<INCOME-PRETAX>                             30,303,693
<INCOME-TAX>                                 8,333,844
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                21,969,849
<EPS-BASIC>                                       1.55
<EPS-DILUTED>                                     1.39