Year US Dollars adjusted for inflation) 1960 2054000000 1961 2039000000 1962 2478000000 1963 3297000000 1964 3723000000 1965 3323000000 1966 3211000000 1967 1351000000 1968 1218000000 1969 1243000000 1970 1407000000 1971 2404000000 1972 853000000 1973 1742000000 1974 2132000000 1975 1835000000 1976 1387000000 1977 1042000000 1978 691000000 1979 65000000 1980 150000000 1981 261000000 1982 453000000 1983 434000000 1984 412000000 1985 130000000 1986 310000000 1987 320000000 1988 429000000 1989 707000000 1990 716000000 1991 694000000 1992 685000000 1993 535000000 1994 423000000 1995 228000000 1996 246000000 1997 60000000 1998 543000000 1999 129000000 2000 113000000 2001 133000000 2002 71000000 2003 63000000 2004 237000000 2005 199000000 2006 406000000 2007 71000000 2008 278000000 2009 331000000 2010 282000000 2011 84000000 2012 131000000 2013 113000000 2014 95000000 2015 96000000 2016 55000000 2017 43000000 2018 14000000 2019 38000000 2020 53000000 2021 192000000 2022 182000000