Year Dollars 1992-01-01 539800 1997-01-01 137256 2002-01-01 591320 2003-01-01 467511 2004-01-01 1166639 2005-01-01 3137776 2006-01-01 1526746 2007-01-01 976008 2008-01-01 3587178 2009-01-01 2055878 2010-01-01 10729195 2011-01-01 1698547 2012-01-01 2262253 2013-01-01 3782707 2014-01-01 2148533 2015-01-01 1591236 2016-01-01 5602129