Year Dollars 1992-01-01 3359288 1997-01-01 5750089 2002-01-01 10296699 2003-01-01 11274866 2004-01-01 9872761 2005-01-01 11027071 2006-01-01 7605297 2007-01-01 12619431 2008-01-01 11025693 2009-01-01 5939216 2010-01-01 14776933 2011-01-01 9798756 2012-01-01 7422741 2013-01-01 9523599 2014-01-01 8778644 2015-01-01 9720056 2016-01-01 17712198