Year US Dollars adjusted for inflation) 1992 0 1993 8000000 1994 12000000 1995 14000000 1996 0 1997 0 1998 0 1999 4000000 2000 3000000 2001 13000000 2002 3000000 2003 25000000 2004 12000000 2005 4000000 2006 9000000 2007 51000000 2008 46000000 2009 11000000 2010 15000000 2011 27000000 2012 9000000 2013 5000000 2014 5000000 2015 3000000 2016 28000000 2017 30000000 2018 21000000 2019 31000000 2020 10000000 2021 15000000 2022 20000000