Year Dollars 1992-01-01 46431782 1997-01-01 86546667 2002-01-01 754785526 2003-01-01 1190010629 2004-01-01 1299664964 2005-01-01 1338476033 2006-01-01 975965951 2007-01-01 1090800631 2008-01-01 872438302 2009-01-01 866884281 2010-01-01 426336291 2011-01-01 331267394 2012-01-01 333167814 2013-01-01 346789228 2014-01-01 403455141 2015-01-01 382415849 2016-01-01 392851593