Year Dollars 1992-01-01 1021699 1997-01-01 7214239 2002-01-01 4222916 2003-01-01 4172160 2004-01-01 4992648 2005-01-01 12243467 2006-01-01 24302918 2007-01-01 12149267 2008-01-01 21454930 2009-01-01 15657320 2010-01-01 10624296 2011-01-01 12345027 2012-01-01 13343166 2013-01-01 13510014 2014-01-01 20746626 2015-01-01 19513200 2016-01-01 13266160