Year Dollars 1992-01-01 5792724 1997-01-01 21324755 2002-01-01 2016286 2003-01-01 5227782 2004-01-01 5410162 2005-01-01 3514328 2006-01-01 2327797 2007-01-01 8313474 2008-01-01 12923445 2009-01-01 9005682 2010-01-01 23877483 2011-01-01 21284506 2012-01-01 15201044 2013-01-01 17054095 2014-01-01 20424696 2015-01-01 13260348 2016-01-01 13332360