Year Dollars 1992-01-01 3201166 1997-01-01 6817209 2002-01-01 8724838 2003-01-01 7909271 2004-01-01 9148935 2005-01-01 6999006 2006-01-01 6225211 2007-01-01 8188409 2008-01-01 8594217 2009-01-01 8846508 2010-01-01 9989323 2011-01-01 10458596 2012-01-01 11629595 2013-01-01 11899024 2014-01-01 13122703 2015-01-01 15349891 2016-01-01 14785804