Year Dollars 1992-01-01 5204444 1997-01-01 13637300 2002-01-01 20906930 2003-01-01 23434015 2004-01-01 24980242 2005-01-01 26142245 2006-01-01 30557924 2007-01-01 28713286 2008-01-01 44960286 2009-01-01 42701626 2010-01-01 37165643 2011-01-01 37983674 2012-01-01 36167945 2013-01-01 37870183 2014-01-01 34016198 2015-01-01 48875045 2016-01-01 59150033