Year Dollars 1992-01-01 36267265 1997-01-01 28389799 2002-01-01 37333796 2003-01-01 33669867 2004-01-01 33539889 2005-01-01 32802011 2006-01-01 27395455 2007-01-01 39822475 2008-01-01 26364658 2009-01-01 15608726 2010-01-01 11328165 2011-01-01 13606760 2012-01-01 21733609 2013-01-01 29541065 2014-01-01 35920608 2015-01-01 26785289 2016-01-01 32125784