<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 17,235 <SECURITIES> 1,523 <RECEIVABLES> 31,367 <ALLOWANCES> 4,899 <INVENTORY> 17,166 <CURRENT-ASSETS> 75,208 <PP&E> 224,000 <DEPRECIATION> 155,427 <TOTAL-ASSETS> 186,282 <CURRENT-LIABILITIES> 38,589 <BONDS> 360 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 2,859 <OTHER-SE> 139,772 <TOTAL-LIABILITY-AND-EQUITY> 186,282 <SALES> 0 <TOTAL-REVENUES> 59,978 <CGS> 28,475 <TOTAL-COSTS> 51,625 <OTHER-EXPENSES> 4,153 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 4,682 <INCOME-TAX> 1,778 <INCOME-CONTINUING> 2,904 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 2,904 <EPS-BASIC> 0.10 <EPS-DILUTED> 0.10