Year Dollars 1992-01-01 401094 2002-01-01 120599 2006-01-01 213304 2007-01-01 301642 2008-01-01 284860 2009-01-01 479852 2010-01-01 260972 2011-01-01 121224 2013-01-01 557659 2014-01-01 422146 2016-01-01 254592