Year Dollars 1992-01-01 1076764 2002-01-01 3539187 2003-01-01 10524643 2004-01-01 6195157 2005-01-01 6065481 2006-01-01 9849776 2007-01-01 11397144 2008-01-01 19786574 2009-01-01 10763377 2010-01-01 12318791 2011-01-01 15657473 2012-01-01 17589002 2013-01-01 21710506 2014-01-01 28003679 2015-01-01 27080818 2016-01-01 19349975