EXHIBIT 12.1

RATIO OF EARNINGS TO FIXED CHARGES

Our ratio of earnings to fixed charges is as follows:

	2011		2010		2009		2008		2007
Earnings:
Income from continuing operations before provision for income taxes and noncontrolling interest	$	251,291	$	303,794	$	270,113	$	124,415	$	413,427
Interest expense and other		3,046		2,584		—		4,285		8,414
Portion of rents representative of the interest factor		17,977		15,955		18,032		22,589		19,654
	$	272,314	$	322,333	$	288,145	$	151,289	$	441,495
Fixed charges:
Interest expense, including amount capitalized	$	9,314	$	14,621	$	11,673	$	10,263	$	13,893
Portion of rents representative of the interest factor		17,977		15,955		18,032		22,589		19,654
	$	27,291	$	30,576	$	29,705	$	32,852	$	33,547
Ratio of earnings to fixed charges		9.98x		10.54x		9.70x		4.61x		13.16x