Year Dollars 1992-01-01 485284 1997-01-01 3499463 2002-01-01 1730338 2003-01-01 2926915 2004-01-01 4787609 2005-01-01 5501445 2006-01-01 6909996 2007-01-01 6523171 2008-01-01 6439739 2009-01-01 5861545 2010-01-01 6451410 2011-01-01 12335753 2012-01-01 6315538 2013-01-01 7596132 2014-01-01 4804070 2015-01-01 5281651 2016-01-01 6296917