Year US Dollars adjusted for inflation) 1960 66000000 1963 3000000 1964 3000000 1965 29000000 1966 9000000 1967 21000000 1968 5000000 1969 1000000 1970 5000000 1971 85000000 1972 41000000 1973 15000000 1974 22000000 1975 40000000 1976 225000000 1977 571000000 1978 192000000 1979 110000000 1980 296000000 1981 152000000 1982 257000000 1983 388000000 1984 349000000 1985 23000000 1986 25000000 1987 40000000 1988 26000000 1989 20000000 1990 3000000 1991 136000000 1992 4000000 1993 18000000 1994 13000000 1995 44000000 1996 29000000 1997 99000000 1998 31000000 1999 16000000 2001 10000000 2002 1000000 2004 15000000 2005 47000000 2006 47000000 2007 2000000 2008 102000000 2009 77000000 2010 89000000 2011 68000000 2012 88000000 2013 11000000 2014 53000000 2015 27000000 2016 26000000 2017 20000000 2018 5000000 2019 3000000 2020 21000000 2021 14000000 2022 1000000