Year Dollars 1992-01-01 8834474 1997-01-01 1548718 2002-01-01 1386666 2003-01-01 1994827 2004-01-01 2527665 2005-01-01 4427146 2006-01-01 4472975 2007-01-01 4848769 2008-01-01 9521507 2009-01-01 9766324 2010-01-01 12099880 2011-01-01 7982140 2012-01-01 9823650 2013-01-01 8699185 2014-01-01 8820759 2015-01-01 18160414 2016-01-01 8762407