Year Dollars 1992-01-01 3637239 1997-01-01 6582319 2002-01-01 8726857 2003-01-01 8419858 2004-01-01 12866436 2005-01-01 13934585 2006-01-01 17256034 2007-01-01 93709130 2008-01-01 27569029 2009-01-01 25968038 2010-01-01 27571170 2011-01-01 17537776 2012-01-01 13697522 2013-01-01 9518702 2014-01-01 7258690 2015-01-01 12083802 2016-01-01 12812140