Year Dollars 1992-01-01 107983739 1997-01-01 139014286 2002-01-01 144742771 2003-01-01 126970860 2004-01-01 129200557 2005-01-01 117607095 2006-01-01 100252498 2007-01-01 167083188 2008-01-01 208631868 2009-01-01 240425273 2010-01-01 392499570 2011-01-01 481719731 2012-01-01 750266675 2013-01-01 837214589 2014-01-01 824385229 2015-01-01 1118654976 2016-01-01 1164207677