Exhibit 12.1: Computation of Ratio of Earnings to Fixed Charges

																NINE
																MONTHS
																ENDED
	TWELVE MONTHS ENDED DECEMBER 31,															SEPTEMBER 30,
(in thousands, except ratio)	2004			2005			2006			2007			2008			2009
Consolidated pretax income (loss)	$	521,212		$	721,051		$	567,108		$	(420,098	)	$	(405,764	)	$	(201,102	)
Share of distributed (income) loss of
50%-or-less-owned affiliates, net of equity pickup	(5,772		)	(315		)	260			(342		)	43,900			(230		)
Amortization of capitalized interest	41,764			45,483			48,708			41,689			61,146			33,237
Interest	53,242			66,697			71,955			62,122			47,109			39,515
Less interest capitalized during the period	(52,015		)	(65,959		)	(71,750		)	(62,024		)	(46,889		)	(31,862		)
Interest portion of rental expense	5,639			5,678			7,736			8,911			7,416			3,667
EARNINGS (LOSS)	$	564,070		$	772,635		$	624,017		$	(369,742	)	$	(293,082	)	$	(156,775	)
Interest	$	53,242		$	66,697		$	71,955		$	62,122		$	47,109		$	39,515
Interest portion of rental expense	5,639			5,678			7,736			8,911			7,416			3,667
FIXED CHARGES	$	58,881		$	72,375		$	79,691		$	71,033		$	54,525		$	43,182
SURPLUS/(DEFICIENCY)	505,189			700,260			544,326			(440,775		)	(347,607		)	(199,957		)
Ratio of earnings to fixed charges	9.58			10.68			7.83			-			-			-