Year US Dollars adjusted for inflation) 1992 2000000 1993 3000000 1994 15000000 1995 17000000 1996 1000000 1997 12000000 1998 4000000 1999 1000000 2000 27000000 2002 1000000 2003 13000000 2004 8000000 2005 18000000 2006 4000000 2007 18000000 2008 28000000 2009 42000000 2010 13000000 2011 1000000 2012 2000000 2013 18000000 2014 2000000 2015 18000000 2016 29000000 2017 33000000 2018 17000000 2019 18000000 2020 25000000 2021 18000000 2022 17000000