Year Dollars 1992-01-01 45445867 1997-01-01 39370537 2002-01-01 13416637 2003-01-01 23970244 2004-01-01 31921786 2005-01-01 26886672 2006-01-01 68703640 2007-01-01 125241932 2008-01-01 54902700 2009-01-01 30443231 2010-01-01 26647096 2011-01-01 22998941 2012-01-01 27736109 2013-01-01 22745824 2014-01-01 19968422 2015-01-01 20861405 2016-01-01 147946297