Year Dollars 1992-01-01 17896992 1997-01-01 7738617 2002-01-01 13517538 2003-01-01 14322536 2004-01-01 20126244 2005-01-01 27338097 2006-01-01 34448891 2007-01-01 32228592 2008-01-01 38553109 2009-01-01 42996180 2010-01-01 34832472 2011-01-01 16613560 2012-01-01 19712301 2013-01-01 17910157 2014-01-01 20059809 2015-01-01 16342074 2016-01-01 19520073