Year Dollars 1992-01-01 15160647 1997-01-01 7803122 2002-01-01 27968020 2003-01-01 24733220 2004-01-01 28511002 2005-01-01 48096439 2006-01-01 37532346 2007-01-01 64934293 2008-01-01 29893947 2009-01-01 41916526 2010-01-01 43920538 2011-01-01 16961940 2012-01-01 26711300 2013-01-01 29874656 2014-01-01 20838401 2015-01-01 19426714 2016-01-01 17894481