Year Dollars 1992-01-01 13279647 1997-01-01 21036287 2002-01-01 23900365 2003-01-01 20399029 2004-01-01 21663637 2005-01-01 33146363 2006-01-01 33363439 2007-01-01 46580636 2008-01-01 91825797 2009-01-01 73186896 2010-01-01 81835770 2011-01-01 50015839 2012-01-01 46341471 2013-01-01 42419845 2014-01-01 39329018 2015-01-01 33178668 2016-01-01 46660630