EXHIBIT 12.2 JEFFERSON SMURFIT CORPORATION (U.S.) CALCULATION OF HISTORICAL RATIOS OF EARNINGS TO FIXED CHARGES Year Ended December 31, --------------------------------------------------------------- 1999 1998 1997 1996 1995 --------------------------------------------------------------- Income (loss) from continuing operations before income taxes, extraordinary item and cumulative effect of accounting change $ 462 $ (279) $ (22) $ 132 $ 370 Add (deduct): Minority interest share of income (loss) 2 Equity in loss of affiliate (1) Interest expense (a) 227 196 196 198 235 Interest component of rental expense 12 13 12 12 12 ------- ------- ------- ------- ------- Earnings available for fixed charges $ 700 $ (70) $ 186 $ 342 $ 619 ======= ======= ======= ======= ======= Fixed Charges: Interest expense (a) $ 227 $ 196 $ 196 $ 198 $ 235 Capitalized interest 3 2 5 3 3 Interest component of rental expense 12 13 12 12 12 ------- ------- ------- ------- ------- Total fixed charges $ 242 $ 211 $ 213 $ 213 $ 250 ======= ======= ======= ======= ======= Ratio of earnings to fixed charges 2.89 (b) (b) 1.60 2.49 ======= ======= ======= ======= ======= (a) Interest expense includes amortization of debt issuance cost of $10 million in 1999, $8 million in 1998, $11 million in 1997, $13 million in 1996 and $14 million in 1995. (b) For the years ended December 31, 1998 and 1997, earnings were inadequate to cover fixed charges by $281 million and $27 million, respectively.