Year Dollars 1992-01-01 307808 1997-01-01 774834 2002-01-01 1218351 2003-01-01 1988140 2004-01-01 2711557 2005-01-01 4342268 2006-01-01 6078771 2007-01-01 10680799 2008-01-01 6833108 2009-01-01 4124385 2010-01-01 4270903 2011-01-01 3204570 2012-01-01 4120070 2013-01-01 2594730 2014-01-01 3695376 2015-01-01 5557400 2016-01-01 4626924