Year Dollars 1992-01-01 2654100 1997-01-01 6355503 2002-01-01 6459513 2003-01-01 12540426 2004-01-01 17596430 2005-01-01 11570341 2006-01-01 15789174 2007-01-01 26208840 2008-01-01 15692911 2009-01-01 16100278 2010-01-01 47969139 2011-01-01 21499886 2012-01-01 12607155 2013-01-01 9886971 2014-01-01 11771302 2015-01-01 12683650 2016-01-01 13705426