Year Dollars 1997-01-01 258565 2002-01-01 351980 2003-01-01 1603783 2004-01-01 1793495 2005-01-01 1528268 2006-01-01 5473632 2007-01-01 4121973 2008-01-01 6232406 2009-01-01 5508548 2010-01-01 4581374 2011-01-01 6310620 2012-01-01 5601222 2013-01-01 7367146 2014-01-01 7437924 2015-01-01 3637668 2016-01-01 6188102