Year Dollars 1992-01-01 2829608 1997-01-01 5969747 2002-01-01 6063646 2003-01-01 5450475 2004-01-01 5635829 2005-01-01 6948758 2006-01-01 13782035 2007-01-01 12428822 2008-01-01 11605803 2009-01-01 8599807 2010-01-01 13820597 2011-01-01 10103539 2012-01-01 13247292 2013-01-01 11224226 2014-01-01 12738947 2015-01-01 17981386 2016-01-01 13848047