Year US Dollars adjusted for inflation) 1960 1000000 1961 1000000 1965 0 1971 4000000 1973 3000000 1974 13000000 1975 10000000 1976 8000000 1977 3000000 1980 10000000 1983 36000000 1984 9000000 1985 1000000 1986 29000000 1987 28000000 1988 9000000 1989 56000000 1994 3000000 1995 1000000 1998 7000000 1999 7000000 2001 16000000 2006 17000000 2007 29000000 2008 82000000 2009 36000000 2010 42000000 2011 1000000 2012 4000000 2013 59000000 2014 58000000 2015 1000000 2016 2000000 2017 6000000 2018 7000000 2019 1000000 2020 4000000 2021 43000000 2022 4000000