Year Dollars 1992-01-01 507427368 1997-01-01 652503382 2002-01-01 570725305 2003-01-01 565880117 2004-01-01 554273643 2005-01-01 612429838 2006-01-01 808767698 2007-01-01 1002869741 2008-01-01 964626347 2009-01-01 1095848508 2010-01-01 958155319 2011-01-01 1125842999 2012-01-01 928967240 2013-01-01 809974169 2014-01-01 514660977 2015-01-01 485682133