Year Dollars 1992-01-01 629723045 1997-01-01 552958702 2002-01-01 774602233 2003-01-01 753091053 2004-01-01 815384127 2005-01-01 1160237686 2006-01-01 1150309778 2007-01-01 1253138181 2008-01-01 1502237075 2009-01-01 1656973476 2010-01-01 1831073459 2011-01-01 1930023507 2012-01-01 1417799160 2013-01-01 1434423280 2014-01-01 1240793910 2015-01-01 1100139266 2016-01-01 1111762188