Year Dollars 1992-01-01 4233108 1997-01-01 9298797 2002-01-01 6833678 2003-01-01 7069531 2004-01-01 7195967 2005-01-01 6130342 2006-01-01 11363370 2007-01-01 13102361 2008-01-01 19218480 2009-01-01 4114479 2010-01-01 3649542 2011-01-01 6087849 2012-01-01 12856262 2013-01-01 16596916 2014-01-01 7906740 2015-01-01 35739666 2016-01-01 29271714