Year Dollars 1992-01-01 637330 1997-01-01 2630625 2002-01-01 5430446 2003-01-01 8606408 2004-01-01 11867519 2005-01-01 4861190 2006-01-01 20846226 2007-01-01 23163346 2008-01-01 6880834 2009-01-01 14591636 2010-01-01 22700097 2011-01-01 13796240 2012-01-01 41276438 2013-01-01 6931242 2014-01-01 24798846 2015-01-01 16827611 2016-01-01 11620658