Year Dollars 1992-01-01 4234100 1997-01-01 6145147 2002-01-01 4641869 2003-01-01 5418303 2004-01-01 3840052 2005-01-01 4231060 2006-01-01 7636968 2007-01-01 7317149 2008-01-01 9110426 2009-01-01 5848444 2010-01-01 11581906 2011-01-01 7978576 2012-01-01 13065444 2013-01-01 19468707 2014-01-01 16068427 2015-01-01 7646499 2016-01-01 4329316