Year Dollars 1992-01-01 7137444 1997-01-01 3998364 2002-01-01 6590079 2003-01-01 7015294 2004-01-01 10354206 2005-01-01 8134428 2006-01-01 8556070 2007-01-01 9434048 2008-01-01 15991049 2009-01-01 20172810 2010-01-01 9686882 2011-01-01 10698785 2012-01-01 17213857 2013-01-01 11194467 2014-01-01 14654115 2015-01-01 14689862 2016-01-01 16345383