Exhibit 12

Computation of Ratio of Earnings to Fixed Charges

(In thousands)

	Twelve Months Ended December 31,
	2006			2005			2004		2003			2002
Earnings:
Income from continuing operations before income taxes	$	555,920		$	654,684		$	82,563	$	(33,507	)	$	(40,423	)
Fixed charges, as shown below		50,227			42,979			49,349		47,845			55,640
Equity in income of investees		(1,201	)		(2,850	)		4,317		8,851			9,818
Minority Interest – Gas		(29,608	)		(9,484	)		—		—			—
Adjusted Earnings (Loss)	$	575,338		$	685,329		$	136,229	$	23,189		$	25,035
Fixed charges:
Interest on indebtedness, expensed or capitalized	$	35,818		$	31,903		$	40,180	$	41,212		$	51,495
Interest within rent expense		14,409			11,076			9,169		6,633			4,145
Total Fixed Charges	$	50,227		$	42,979		$	49,349	$	47,845		$	55,640
Ratio of Earnings to Fixed Charges		11.45			15.95			2.76		—			—

(1) The deficiency of earnings to cover fixed charges was $24,656 for the year period ended December 31, 2003.

(2) The deficiency of earnings to cover fixed charges was $30,605 for the year period ended December 31, 2002.