Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges
($ in thousands)

	Six Months Ended
	June 30						Year Ended December 31,
	2007			2006			2006			2005			2004			2003			2002
Income (loss) from continuing operations before income taxes(a)	$	664,006		$	557,885		$	1,237,729		$	618,231		$	411,946		$	188,632		$	(32,065	)
Fixed charges:
Interest expense(b)		74,725			45,824			109,216			80,189			63,467			76,447			85,419
Capitalized Interest		1,322			1,129			2,483			2,072			3,465			3,020			1,695
Interest factor portion of rentals(c)		17,815			13,371			30,275			23,290			13,991			13,581			13,769
Total fixed charges		93,862			60,324			141,974			105,551			80,923			93,048			100,883
Less: Capitalized Interest		(1,322	)		(1,129	)		(2,483	)		(2,072	)		(3,465	)		(3,020	)		(1,695	)
Earnings before income taxes and fixed charges	$	756,546		$	617,080		$	1,377,220		$	721,710		$	489,404		$	278,660		$	67,123
Ratio of earnings to fixed charges		8.06			10.23			9.70			6.84			6.05			2.99			—	(d)

(a)	Income (loss) from continuing operations before income taxes 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)	For the year ended December 31, 2002, earnings, as defined, before fixed charges were inadequate to cover fixed charges by $33.8 million.