Three Months
Ended
March 31,

Add: Interest expense

16,227

Earnings available for fixed charges

Fixed charges:

Total fixed charges

31,313

120,644

132,345

148,207

151,443

142,492

Preferred stock dividends

7,483

Total combined fixed charges and preferred stock dividends

Consolidated Ratio of earnings to fixed charges (c)

1.56

Consolidated Ratio of earnings to combined fixed charges and preferred stock dividends (c)

1.09

(a)

Amounts disclosed for prior periods have been reclassified to conform to the current period presentation related to discontinued operations.

(b)

Income from continuing operations before noncontrolling interests for the three months ended March 31, 2012, and the years ended December 31, 2011 and 2010, includes the gain on sales of land parcels of approximately $1.9 million, $46,000, and $59.4 million, respectively. Pursuant to the presentation and disclosure literature on gains/losses on sales or disposals by real estate investment trusts (“REITs”) and earnings per share required by the Securities and Exchange Commission and the Financial Accounting Standards Board, gains or losses on sales or disposals by a REIT that do not qualify as discontinued operations are classified below income from discontinued operations in the statements of income and are included in the numerator for the computation of earnings per share for income from continuing operations. The land parcels we sold during the three months ended March 31, 2012, and the years ended December 31, 2011 and 2010, did not meet the criteria for discontinued operations because the parcels did not have any significant operations prior to disposition. Accordingly, for the three months ended March 31, 2012, and the years ended December 31, 2011 and 2010, we classified the $1.9 million, $46,000, and $59.4 million, respectively, gain on sales of land parcels below income from discontinued operations, net, in the condensed consolidated statements of income, and included the gain in income from continuing operations for the computation of earnings per share.

(c)

For purposes of calculating the consolidated ratio of earnings to fixed charges and consolidated ratio of earnings to combined fixed charges and preferred stock dividends, earnings consist of income from continuing operations before noncontrolling interests and interest expense less noncontrolling interests in income of subsidiaries that have not incurred fixed charges. Fixed charges consist of interest incurred (including amortization of deferred financing costs and capitalized interest).

(d)

Ratios for the three months ended March 31, 2012, include the effect of losses on early extinguishment of debt aggregating $0.6 million and a preferred stock redemption charge of $6.0 million. Excluding the impact of losses on early extinguishment of debt and the preferred stock redemption charge, the consolidated ratio of earnings to fixed charges and consolidated ratio of earnings to combined fixed charges and preferred stock dividends for the three months ended March 31, 2012, were 1.58, and 1.28, respectively.

(e)

Ratios for the year ended December 31, 2011, include the effect of loss on early extinguishment of debt aggregating $6.5 million and a non-cash impairment charge of approximately $1.0 million. Excluding the impact of loss on early extinguishment of debt and the non-cash impairment charge, the consolidated ratio of earnings to fixed charges and consolidated ratio of earnings to combined fixed charges and preferred stock dividends for the year ended December 31, 2011, were 1.71 and 1.38, respectively.

(f)

Ratios for the year ended December 31, 2010, include the effect of loss on early extinguishment of debt aggregating $45.2 million. Excluding the impact of loss on early extinguishment of debt, the consolidated ratio of earnings to fixed charges and the consolidated ratio of earnings to combined fixed charges and preferred stock dividends for the year ended December 31, 2010, were 1.90 and 1.56, respectively.

(g)

Ratios for the year ended December 31, 2008, include the effect of non-cash impairment charges aggregating $13.3 million for other-than-temporary declines in the fair value of certain investments. Excluding the impact of the non-cash impairment charges, the consolidated ratio of earnings to fixed charges and the consolidated ratio of earnings to combined fixed charges and preferred stock dividends for the year ended December 31, 2008, were 1.30 and 1.12, respectively.

(h)

Ratios for the year ended December 31, 2007, include the effect of a preferred stock redemption charge. Excluding the impact of this charge, the consolidated ratio of earnings to combined fixed charges and preferred stock dividends for the year ended December 31, 2007, was 1.09.