Year Dollars 1992-01-01 305390166 1997-01-01 615543507 2002-01-01 623857615 2003-01-01 629051789 2004-01-01 536858964 2005-01-01 548392952 2006-01-01 630267776 2007-01-01 1326083208 2008-01-01 1533870173 2009-01-01 1177263840 2010-01-01 1417743544 2011-01-01 1671074674 2012-01-01 1535995103 2013-01-01 1120325965 2014-01-01 2002643639 2015-01-01 676373725 2016-01-01 603088254