<ARTICLE>                     5
<LEGEND>
          This schedule contains summary financial information extracted for the
twelve months ended December 31, 1999 and is qualified in its entirety by
reference to such financial statements.
</LEGEND>

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-END>                                   DEC-31-1999
<CASH>                                         149,895,000
<SECURITIES>                                    14,452,000
<RECEIVABLES>                                   25,151,000
<ALLOWANCES>                                             0
<INVENTORY>                                     10,334,000
<CURRENT-ASSETS>                               212,705,000
<PP&E>                                         151,273,000
<DEPRECIATION>                                  66,383,000
<TOTAL-ASSETS>                                 317,610,000
<CURRENT-LIABILITIES>                           36,383,000
<BONDS>                                                  0
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                              0
<COMMON>                                           289,000
<OTHER-SE>                                     276,360,000
<TOTAL-LIABILITY-AND-EQUITY>                   317,610,000
<SALES>                                        131,159,000
<TOTAL-REVENUES>                               131,159,000
<CGS>                                           75,820,000
<TOTAL-COSTS>                                   75,820,000
<OTHER-EXPENSES>                                55,235,000
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                              (3,293,000)
<INCOME-PRETAX>                                  3,398,000
<INCOME-TAX>                                       810,000
<INCOME-CONTINUING>                              2,588,000
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                     2,588,000
<EPS-BASIC>                                           0.11
<EPS-DILUTED>                                         0.10