Year Dollars 1992-01-01 3666076 1997-01-01 946181 2002-01-01 943851 2003-01-01 3103200 2004-01-01 877498 2005-01-01 1386431 2006-01-01 2748175 2007-01-01 5512120 2008-01-01 10412536 2009-01-01 6759559 2010-01-01 11929388 2011-01-01 11752169 2012-01-01 9543299 2013-01-01 22495040 2014-01-01 17686467 2015-01-01 7645298 2016-01-01 11312700