Exhibit 12 COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES For the Years Ended (Dollars in thousands) 1997 1996 1995 - ---------------------------------- ------------- --------------- ------------- Income before taxes $615,713 $456,230 $386,655 Add fixed charges: Interest expense 46,563 36,866 39,721 Interest factor on rent 9,202 8,085 7,271 - ---------------------------------- ------------- --------------- ------------- Total fixed charges 55,765 44,951 46,992 Earnings before fixed charges and taxes on income $671,478 $501,181 $433,647 ================================== ============= =============== ============= Ratio of earnings to fixed charges 12.0 11.1 9.2 ================================== ============= =============== =============