EXHIBIT 12 COMPUTATION OF RATRIOS OF EARNINGS TO FIXED CHARGES 1996 1995 1994 - ----------------------------- -------- --------- --------- Income before taxes $456,230 $386,655 $362,521 Add fixed charges: Interest expense 28,373 29,495 29,765 Interest factor on rent 8,085 7,271 5,026 Total fixed charges 36,458 36,766 34,791 Earnings before fixed charges and taxes on income $492,688 $423,421 $397,312 Ratio of earnings to fixed charges 13.5 11.5 11.4