Year Dollars 1992-01-01 40902333 1997-01-01 53254065 2002-01-01 256583065 2003-01-01 299920500 2004-01-01 375214725 2005-01-01 428867626 2006-01-01 380143668 2007-01-01 472589526 2008-01-01 616969237 2009-01-01 311153817 2010-01-01 367678320 2011-01-01 284891409 2012-01-01 268409345 2013-01-01 295200499 2014-01-01 218837871 2015-01-01 145025839 2016-01-01 173413305