Year Dollars 1992-01-01 80140095 1997-01-01 151922857 2002-01-01 168533729 2003-01-01 183630857 2004-01-01 285800209 2005-01-01 310542020 2006-01-01 308295742 2007-01-01 372837550 2008-01-01 324661186 2009-01-01 499695371 2010-01-01 368115292 2011-01-01 462960607 2012-01-01 565192573 2013-01-01 547836523 2014-01-01 537108511 2015-01-01 504389838 2016-01-01 504808211