Year US Dollars adjusted for inflation) 1960 92000000 1961 132000000 1962 188000000 1963 573000000 1964 648000000 1965 512000000 1966 106000000 1967 39000000 1968 220000000 1969 240000000 1970 514000000 1971 499000000 1972 492000000 1973 580000000 1974 113000000 1975 130000000 1976 184000000 1977 187000000 1978 412000000 1979 792000000 1980 577000000 1981 521000000 1982 438000000 1983 583000000 1984 575000000 1985 287000000 1986 91000000 1987 91000000 1988 407000000 1989 203000000 1990 314000000 1991 125000000 1992 48000000 1993 73000000 1994 47000000 1995 16000000 1996 3000000 1997 50000000 1998 55000000 1999 58000000 2000 35000000 2001 29000000 2002 48000000 2003 21000000 2004 15000000 2005 3000000 2006 15000000 2007 171000000 2008 191000000 2009 86000000 2010 35000000 2011 23000000 2012 29000000 2013 45000000 2014 100000000 2015 55000000 2016 4000000 2017 7000000 2018 1000000 2019 9000000 2020 90000000 2021 255000000 2022 158000000