Year US Dollars adjusted for inflation) 1965 2000000 1966 0 1970 8000000 1971 8000000 1972 3000000 1973 1000000 1974 2000000 1975 15000000 1976 6000000 1981 1000000 1984 3000000 1985 3000000 1989 1000000 1992 1000000 1995 1000000 2001 11000000 2002 9000000 2003 9000000 2004 34000000 2005 6000000 2008 1000000 2011 3000000 2014 5000000 2015 14000000 2016 8000000 2017 1000000 2018 7000000 2019 36000000 2021 0