EXHIBIT 12.1
STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
<Table>
<Caption>
HISTORICAL HISTORICAL
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NINE MONTHS
ENDED
TWELVE MONTHS ENDED DECEMBER 31, SEPTEMBER 30,
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1996 1997 1998 1999 2000 2000 2001
-------- -------- -------- -------- -------- -------- --------
Income (loss) from continuing operations before
income taxes and extraordinary items (a) $ 98,276 $196,885 $ (6,658) $ 28,460 $ 70,264 $ 70,573 $241,210
Fixed charges:
Interest expense (b) 31,997 30,638 42,489 44,904 59,262 45,360 53,602
Interest factor portion of rentals (c) 7,960 8,695 8,790 9,570 11,900 8,827 5,873
-------- -------- -------- -------- -------- -------- --------
Total fixed charges 39,957 39,333 51,279 54,474 71,162 54,187 59,475
Earnings before income taxes
and fixed charges $138,233 $236,218 $ 44,621 $ 82,934 $141,426 $124,760 $300,685
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Ratio of earnings to fixed charges 3.46 6.00 0.87(d) 1.52 1.99 2.30 5.06
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</Table>
(a) Income (loss) from continuing operations before income taxes and
extraordinary items has been adjusted to include only distributed income of
less-than- fifty-percent-owned persons.
(b) Interest expense consists of interest expense incurred from continuing
operations and amortization of debt issuance costs.
(c) Interest factor portion of rentals is estimated to be one third of rental
expense.
(d) In 1998, earnings, as-defined, before fixed charges were inadequate to cover
fixed charges by $6.7 million for the twelve months ended December 31, 1998.