Year Dollars 1992-01-01 181057565 1997-01-01 484317926 2002-01-01 246660006 2003-01-01 135164491 2004-01-01 177893507 2005-01-01 162327724 2006-01-01 277384718 2007-01-01 265741584 2008-01-01 231141368 2009-01-01 182515011 2010-01-01 252617167 2011-01-01 299154117 2012-01-01 286407742 2013-01-01 548877552 2014-01-01 321687464 2015-01-01 358129312 2016-01-01 369238811