Year US Dollars adjusted for inflation) 1960 1000000 1963 1000000 1964 1000000 1965 1000000 1966 2000000 1967 7000000 1968 5000000 1969 36000000 1970 26000000 1971 60000000 1972 11000000 1973 71000000 1974 67000000 1975 181000000 1976 150000000 1977 250000000 1978 81000000 1979 43000000 1980 12000000 1981 72000000 1982 182000000 1983 356000000 1984 120000000 1985 88000000 1986 49000000 1987 40000000 1988 19000000 1989 119000000 1990 60000000 1993 55000000 1994 145000000 1995 278000000 1996 286000000 1997 158000000 1998 22000000 2000 118000000 2001 32000000 2002 39000000 2003 37000000 2004 49000000 2005 178000000 2006 296000000 2007 12000000 2008 72000000 2009 94000000 2010 31000000 2011 21000000 2012 122000000 2013 492000000 2014 719000000 2015 151000000 2016 447000000 2017 782000000 2018 282000000 2019 86000000 2020 85000000 2021 4000000 2022 5000000