Year Dollars 1992-01-01 20557187 1997-01-01 46479650 2002-01-01 29815528 2003-01-01 45523118 2004-01-01 45913691 2005-01-01 48833771 2006-01-01 58074376 2007-01-01 61447966 2008-01-01 59996866 2009-01-01 41262225 2010-01-01 52039598 2011-01-01 58326419 2012-01-01 54622075 2013-01-01 68383928 2014-01-01 65765074 2015-01-01 67642953 2016-01-01 62980245