Year Dollars 1992-01-01 63398117 1997-01-01 30203093 2002-01-01 23305697 2003-01-01 17319218 2004-01-01 18881039 2005-01-01 16392959 2006-01-01 12629343 2007-01-01 24904454 2009-01-01 9958112 2010-01-01 18495785 2011-01-01 16890608 2012-01-01 15601674 2013-01-01 15849926 2014-01-01 14896134 2015-01-01 17922570 2016-01-01 29050531