Year US Dollars adjusted for inflation) 1962 14000000 1965 1000000 1966 6000000 1969 19000000 1973 2000000 1975 31000000 1976 30000000 1977 25000000 1978 29000000 1979 9000000 1980 13000000 1981 27000000 1982 30000000 1983 33000000 1984 25000000 1985 35000000 1986 75000000 1987 13000000 1988 44000000 1989 17000000 2008 0 2011 0 2012 0 2013 20000000 2014 13000000 2015 8000000 2017 10000000 2018 1000000 2019 23000000 2020 0 2021 4000000