Year Dollars 2002-01-01 4046548 2003-01-01 17339744 2004-01-01 28054334 2005-01-01 17412095 2006-01-01 16560722 2007-01-01 15388808 2008-01-01 45845739 2009-01-01 42534537 2010-01-01 61413558 2011-01-01 16816178 2012-01-01 36105943 2013-01-01 27509106 2015-01-01 30923871 2016-01-01 16829065