Year Dollars 1992-01-01 652492 1997-01-01 368796 2002-01-01 5518899 2003-01-01 4157663 2004-01-01 7535614 2005-01-01 9843648 2006-01-01 9794042 2008-01-01 9028416 2009-01-01 7266119 2010-01-01 12257656 2011-01-01 15425805 2012-01-01 14042964 2013-01-01 18098731 2014-01-01 16691579 2015-01-01 16236040 2016-01-01 20785263