Year Dollars 1992-01-01 3732172 1997-01-01 3057826 2002-01-01 3633904 2003-01-01 3342265 2004-01-01 3681859 2005-01-01 8631472 2006-01-01 3511459 2007-01-01 4573038 2008-01-01 10815971 2009-01-01 3520738 2010-01-01 8879303 2011-01-01 9354358 2012-01-01 11950413 2013-01-01 12795666 2014-01-01 10273093 2015-01-01 9115076 2016-01-01 11467744