Year Dollars 1992-01-01 1589467 1997-01-01 4150829 2002-01-01 7267842 2003-01-01 8201918 2004-01-01 10038999 2005-01-01 10803202 2006-01-01 15641564 2007-01-01 25998752 2008-01-01 18353432 2009-01-01 9934307 2010-01-01 26738788 2011-01-01 34134068 2012-01-01 60076117 2013-01-01 51676287 2014-01-01 59708208 2015-01-01 51412100 2016-01-01 68746002