Year Dollars 1997-01-01 8102688 2002-01-01 1912812 2003-01-01 5854516 2004-01-01 6188557 2005-01-01 8844801 2006-01-01 72616121 2007-01-01 32598898 2008-01-01 11970478 2009-01-01 21458118 2010-01-01 12248047 2011-01-01 11982162 2012-01-01 8582083 2013-01-01 21148555 2014-01-01 12722079 2015-01-01 15303595 2016-01-01 12935452