Exhibit 12.1

	Three Months
	Ended		Twelve Months Ended December 31,
	March 31, 2006		2005		2004		2003		2002		2001
Pre-tax income (loss) from continuing operations before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees	$	180,570	$	361,507	$	155,635	$	184,101	$	240,775	$	348,428
Fixed charges:
Interest expense and amortization of debt issuance costs and debt discount and premium on all indebtedness		12,479		19,786		34,389		40,291		42,622		47,752
Interest Capitalized		6,876		13,989		—		—		—		—
Rentals		298		1,668		1,632		1,346		1,229		1,269
Total fixed charges	$	19,653	$	35,443	$	36,021	$	41,637	$	43,851	$	49,021
Pre-tax income (loss) from continuing operations before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees plus fixed charges and amortization of capitalized interest less interest capitalized	$	193,803	$	384,788	$	193,483	$	227,565	$	286,454	$	399,276
Ratio of earnings to fixed charges		9.9		10.9		5.4		5.5		6.5		8.1