Year Dollars 1992-01-01 2217437 1997-01-01 14756132 2002-01-01 26533121 2003-01-01 12167716 2004-01-01 16172387 2005-01-01 18249610 2006-01-01 19970771 2007-01-01 24032076 2008-01-01 35645410 2009-01-01 19259248 2010-01-01 24996141 2011-01-01 28866527 2012-01-01 29570154 2013-01-01 26976620 2014-01-01 22839609 2015-01-01 25552209 2016-01-01 14661480