Year Dollars 1997-01-01 6895869 2002-01-01 10744861 2003-01-01 4749004 2004-01-01 2811670 2006-01-01 10802976 2007-01-01 12664822 2008-01-01 17457515 2009-01-01 67622671 2010-01-01 7754051 2011-01-01 11230769 2012-01-01 22917650 2015-01-01 17507906 2016-01-01 7806228