Year Dollars 1992-01-01 464265 1997-01-01 2133432 2002-01-01 10783493 2003-01-01 13508377 2004-01-01 29501964 2005-01-01 15740252 2006-01-01 13802734 2007-01-01 18711907 2008-01-01 17379774 2009-01-01 16857253 2010-01-01 28993297 2011-01-01 18276537 2012-01-01 14002640 2013-01-01 14884916 2014-01-01 11245391 2015-01-01 11664729 2016-01-01 19007503