EXHIBIT 12

Ratio of Earnings to Fixed Charges

	2008		2007		2006		2005		2004
Ratio of earnings to fixed charges:
Ratio		2.07		2.36		1.62		1.53		1.61
Income from continuing operations	$	108,140	$	132,633	$	52,634	$	33,438	$	32,823
Interest		101,045		97,639		85,541		62,625		53,270
“Earnings”	$	209,185	$	230,272	$	138,175	$	96,063	$	86,093
Interest	$	101,045	$	97,639	$	85,541	$	62,625	$	53,270
Capitalized interest		—		—		—		—		365
“Fixed charges”	$	101,045	$	97,639	$	85,541	$	62,625	$	53,635
Ratio of earnings to combined fixed charges and preferred stock dividends:
Ratio		1.92		2.07		1.37		1.23		1.32
Income from continuing operations	$	108,140	$	132,633	$	52,634	$	33,438	$	32,823
Interest		101,045		97,639		85,541		62,625		53,270
“Earnings”	$	209,185	$	230,272	$	138,175	$	96,063	$	86,093
Interest	$	101,045	$	97,639	$	85,541	$	62,625	$	53,270
Capitalized interest		—		—		—		—		365
Preferred dividends		7,637		13,434		15,163		15,622		11,802
“Combined fixed charges and preferred stock dividends”	$	108,682	$	111,073	$	100,704	$	78,247	$	65,437