Year Dollars 1992-01-01 2903733 1997-01-01 2793549 2002-01-01 2751515 2003-01-01 2477827 2004-01-01 6135310 2005-01-01 6667934 2006-01-01 21751618 2007-01-01 30615718 2008-01-01 32256325 2010-01-01 5704090 2011-01-01 5933584 2012-01-01 10145995 2013-01-01 4914060 2014-01-01 4428533 2015-01-01 11638579 2016-01-01 4389460