Year US Dollars adjusted for inflation) 1994 2000000 1995 4000000 1997 4000000 1998 5000000 2001 21000000 2002 11000000 2004 16000000 2006 72000000 2008 24000000 2009 15000000 2010 3000000 2011 1000000 2012 57000000 2013 9000000 2014 2000000 2016 3000000 2017 35000000