Year Dollars 1992-01-01 8497434 1997-01-01 3827676 2002-01-01 3116542 2003-01-01 4244444 2004-01-01 6693835 2005-01-01 6918860 2006-01-01 12334939 2007-01-01 16630911 2008-01-01 23389571 2009-01-01 13314618 2010-01-01 13591827 2011-01-01 15718998 2012-01-01 15746089 2013-01-01 17200749 2014-01-01 17877500 2015-01-01 34121485 2016-01-01 27002143