Year Dollars 2004-01-01 437164 2005-01-01 764814 2006-01-01 849509 2007-01-01 1577965 2008-01-01 1363894 2009-01-01 4822750 2010-01-01 1893568 2011-01-01 2385952 2012-01-01 18263405 2013-01-01 6398570 2015-01-01 9826304 2016-01-01 5021062