EXHIBIT 12.1

RATIO OF EARNINGS TO FIXED CHARGES

	Six Months Ended June 30, 2013			Year Ended December 31, 2012			Year Ended December 31, 2011			Year Ended December 31, 2010			Year Ended December 31, 2009			Year Ended December 31, 2008
Earnings from continuing operations before fixed charges
Loss from continuing operations	$	(279,844	)	$	(4,026,482	)	$	(5,569,788	)	$	(3,037,917	)	$	(4,817,713	)	$	(2,395,709	)
Equity (income) loss from less than fifty percent owned affiliates		(557,116	)		(172,172	)		60,094			(16,931	)		249,367			(48,496	)
Fixed charges		5,013,191			12,382,146			10,821,815			10,030,517			9,932,426			8,413,513
Amortization of capitalized interest		38,900			77,799			77,799			77,799			71,836			24,509
Distributed income from less than fifty percent owned affiliates		750,000			500,000			437,500			238,386			318,521			149,317
Capitalized interest		—			—			—			—			(270,555	)		(1,602,053	)
Earnings from continuing operations before fixed charges	$	4,965,131		$	8,761,291		$	5,827,420		$	7,291,851		$	5,483,882		$	4,541,081
Fixed charges
Interest expense	$	5,013,191		$	12,382,146		$	10,821,815		$	10,030,517		$	9,661,871		$	6,811,460
Capitalized interest		—			—			—			—			270,555			1,602,053
Fixed charges		5,013,191			12,382,146			10,821,815			10,030,517			9,932,426			8,413,513
Ratio of earnings to fixed charges		0.99			0.71			0.54			0.73			0.55			0.54
Deficiency	$	48,060		$	3,620,855		$	4,994,395		$	2,738,663		$	4,448,544		$	3,872,432