Year US Dollars adjusted for inflation) 1960 221000000 1961 238000000 1962 264000000 1963 323000000 1964 326000000 1965 190000000 1966 109000000 1967 84000000 1968 70000000 1969 70000000 1970 38000000 1971 582000000 1972 773000000 1973 658000000 1974 586000000 1975 388000000 1976 499000000 1977 384000000 1978 369000000 1979 253000000 1980 380000000 1981 531000000 1982 248000000 1983 463000000 1984 382000000 1985 654000000 1986 420000000 1987 1993000000 1988 1788000000 1989 1783000000 1990 363000000 1991 491000000 1992 484000000 1993 912000000 1994 935000000 1995 741000000 1996 555000000 1997 567000000 1998 249000000 1999 222000000 2000 302000000 2001 463000000 2002 471000000 2003 567000000 2004 537000000 2005 501000000 2006 634000000 2007 831000000 2008 968000000 2009 977000000 2010 1085000000 2011 1002000000 2012 1210000000 2013 787000000 2014 591000000 2015 520000000 2016 458000000 2017 527000000 2018 380000000 2019 890000000 2020 801000000 2021 868000000 2022 837000000