Exhibit 12

Statement re: Calculation of Ratios of Earnings to

Combined Fixed Charges and Preferred Stock Dividends

(Dollars in thousands)

	NineMonths
	Ended				Year Ended			Year Ended			Year Ended					Year Ended					Year Ended
	September				December			December			December					December					December
	30, 2004				31, 2003			31, 2002			31, 2001					31, 2000					31, 1999
Net income from continuing operations less preferred dividends	$	94,411			$	144,455		$	156,582		$		218,320			$		206,475			$		139,636
Preferred dividends	24,321				37,321			45,053			52,442					48,981					42,604
Earnings from land and depreciated property dispositions	(8,940			)	(15,752		)	(7,292		)	(45,708				)	(60,692				)	(10,012				)
Operating Partnership minority interest	9,970				15,656			17,088			30,460					31,096					19,811
Interest expense	99,755				126,039			111,730			106,575					124,154					86,757
Earnings before fixed charges	$		219,517		$	307,719		$	323,161		$		362,089			$		350,014			$		278,796
Interest expense	$		99,755		$	126,039		$	111,730		$		106,575			$		124,154			$		86,757
Interest costs capitalized	4,381				6,734			13,529			25,859					32,980					26,017
Total fixed charges	$		104,136		$	132,773		$	125,259		$			132,434		$		157,134			$		112,774
Preferred dividends	$		24,321		$	37,321		$	45,053		$	52,442				$		48,981			$		42,604
Total fixed charges and preferred Dividends	$		128,457		$	170,094		$	170,312		$	184,876					$		206,115			$		155,378
Ratio of Earnings to Fixed Charges	2.11				2.32			2.58			2.73					2.23					2.47
Ratio of Earnings to Combined Fixed Charges and Preferred Dividends	1.71				1.81			1.90			1.96					1.70					1.79