Year Dollars 1992-01-01 431684 1997-01-01 644618 2002-01-01 296502 2003-01-01 764807 2007-01-01 1498109 2008-01-01 699559 2009-01-01 23879725 2011-01-01 7102799 2012-01-01 27236336 2013-01-01 3235394 2014-01-01 22242195 2015-01-01 1943710 2016-01-01 4167821