Year Dollars 1992-01-01 96065786 1997-01-01 153087993 2002-01-01 243762954 2003-01-01 268325409 2004-01-01 300646344 2005-01-01 306512107 2006-01-01 353159809 2007-01-01 454398664 2008-01-01 369545044 2009-01-01 349731134 2010-01-01 471181672 2011-01-01 584001457 2012-01-01 641443549 2013-01-01 606934871 2014-01-01 680466734 2015-01-01 580219384 2016-01-01 606287690