Year Dollars 1992-01-01 4909500 1997-01-01 6515715 2002-01-01 7489001 2003-01-01 10824700 2004-01-01 13638543 2005-01-01 4337617 2006-01-01 9310535 2007-01-01 9489840 2008-01-01 13448432 2009-01-01 7480171 2010-01-01 7009054 2011-01-01 13793891 2012-01-01 7163392 2013-01-01 7100680 2014-01-01 14803172 2015-01-01 9717901 2016-01-01 43710255