Year US Dollars adjusted for inflation) 1960 1000000 1961 1000000 1964 1000000 1965 1000000 1969 2000000 1970 1000000 1971 12000000 1974 3000000 1978 2000000 1979 57000000 1980 7000000 1982 6000000 1983 25000000 1984 3000000 1986 3000000 1991 14000000 1997 3000000 2003 5000000 2008 8000000 2009 1000000 2013 12000000 2014 3000000 2015 10000000 2016 0 2017 3000000 2018 1000000 2019 5000000 2020 18000000 2021 16000000 2022 26000000