Year Dollars 1992-01-01 3242224 1997-01-01 2962209 2002-01-01 6942303 2003-01-01 7217011 2004-01-01 7954466 2005-01-01 7582088 2006-01-01 10874083 2007-01-01 5314057 2008-01-01 6240291 2009-01-01 6668900 2010-01-01 9975135 2011-01-01 9194475 2012-01-01 15684335 2013-01-01 16871404 2014-01-01 17349228 2015-01-01 20069596 2016-01-01 13783887