EXHIBIT 12

Ratio of Earnings to Fixed Charges

	2005		2004		2003		2002		2001
Ratio of earnings to fixed charges
Ratio		2.07		2.18		1.90		1.67		1.96
Income from continuing operations	$	71,550	$	66,379	$	51,601	$	37,395	$	53,074
Interest		67,031		56,074		57,287		55,541		55,459
“Earnings”	$	138,581	$	122,453	$	108,888	$	92,936	$	108,533
Interest	$	67,031	$	55,709	$	56,519	$	54,987	$	54,846
Capitalized interest		—		365		768		554		613
“Fixed charges”	$	67,031	$	56,074	$	57,287	$	55,541	$	55,459
Ratio of earnings to combined fixed charges and preferred stock dividends
Ratio		1.68		1.80		1.66		1.46		1.71
Income from continuing operations	$	71,550	$	66,379	$	51,601	$	37,395	$	53,074
Interest		67,031		55,709		56,519		54,987		54,846
“Earnings”	$	138,581	$	122,088	$	108,120	$	92,382	$	107,920
Interest	$	67,031	$	55,709	$	56,519	$	54,987	$	54,846
Capitalized interest		—		365		768		554		613
Preferred dividends		15,622		11,802		7,677		7,677		7,677
“Combined fixed charges and preferred stock dividends”	$	82,653	$	67,876	$	64,964	$	63,218	$	63,136