Year Dollars 1992-01-01 1315953 1997-01-01 5722040 2002-01-01 7317897 2003-01-01 7767078 2004-01-01 16554657 2005-01-01 15332629 2006-01-01 17437592 2007-01-01 19198244 2008-01-01 22747336 2009-01-01 20062646 2010-01-01 20733160 2011-01-01 25111655 2012-01-01 26543444 2013-01-01 32057397 2014-01-01 39247452 2015-01-01 37409580 2016-01-01 50751489