Year Dollars 1992-01-01 2200512 1997-01-01 8368836 2002-01-01 2624802 2003-01-01 2619552 2004-01-01 5879570 2005-01-01 6686187 2006-01-01 5866673 2007-01-01 10929031 2008-01-01 18339994 2009-01-01 12772602 2010-01-01 25196544 2011-01-01 14690205 2012-01-01 15816918 2013-01-01 28724426 2014-01-01 22981331 2015-01-01 15342507 2016-01-01 13178338