Year US Dollars adjusted for inflation) 1966 9000000 1967 2000000 1969 3000000 1973 0 1980 1000000 1981 5000000 1982 3000000 1983 11000000 1984 2000000 1989 6000000 1990 6000000 2001 1000000 2002 3000000 2009 1000000 2010 2000000 2012 5000000 2015 1000000 2016 3000000 2019 2000000