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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Total
Redeemable preferred stock
Common stock
Additional paid-in capital
Retained earnings
Non-controlling interest
Beginning Balance at Dec. 31, 2008 $ 123,550,776 $ 10,420 $ 8,717,616 $ 80,461,942 $ 32,340,077 $ 2,020,721
Beginning Balance (in shares) at Dec. 31, 2008   17,366 14,529,360      
Issue of share capital (in shares)   5,651 6,734      
Issue of share capital 94,135 3,390 4,041 86,704    
Conversion of preferred stock (in shares)   (5,784) 5,784      
Conversion of preferred stock   (3,470) 3,470      
Buyback of preferred stock (in shares)   (41)        
Buyback of preferred stock (888) (25)   (863)    
Net income 6,599,682       6,098,571 501,111
Dividends declared (5,145,810)       (4,073,008) (1,072,802)
Stock-based compensation 442,903     442,903    
Ending Balance at Dec. 31, 2009 125,540,798 10,315 8,725,127 80,990,686 34,365,640 1,449,030
Ending Balance (in shares) at Dec. 31, 2009   17,192 14,541,878      
Issue of share capital (in shares)   5,899 8,565      
Issue of share capital 126,119 3,539 5,139 117,441    
Conversion of preferred stock (in shares)   (4,950) 4,950      
Conversion of preferred stock   (2,970) 2,970      
Buyback of preferred stock (in shares)   (1,357)        
Buyback of preferred stock (16,796) (814)   (15,982)    
Net income 6,443,162       6,292,025 151,137
Dividends declared (4,367,959)       (4,367,959)  
Stock-based compensation 257,799     257,799    
Ending Balance at Dec. 31, 2010 127,983,123 10,070 8,733,236 81,349,944 36,289,706 1,600,167
Ending Balance (in shares) at Dec. 31, 2010   16,784 14,555,393      
Issue of share capital (in shares)   8,345 11,158      
Issue of share capital 110,985 5,007 6,694 99,284    
Conversion of preferred stock (in shares)   (2,145) 2,145      
Conversion of preferred stock   (1,287) 1,287      
Buyback of preferred stock (in shares)   (557)        
Buyback of preferred stock (4,999) (334)   (4,665)    
Net income 6,551,980       6,113,218 438,762
Dividends declared (4,854,381)       (4,371,981) (482,400)
Stock-based compensation 494,648     494,648    
Ending Balance at Dec. 31, 2011 $ 130,281,356 $ 13,456 $ 8,741,217 $ 81,939,211 $ 38,030,943 $ 1,556,529
Ending Balance (in shares) at Dec. 31, 2011   22,427 14,568,696