Year US Dollars adjusted for inflation) 1960 853000000 1961 849000000 1962 688000000 1963 1001000000 1964 1564000000 1965 1154000000 1966 980000000 1967 745000000 1968 860000000 1969 932000000 1970 796000000 1971 922000000 1972 848000000 1973 1044000000 1974 1064000000 1975 963000000 1976 785000000 1977 924000000 1978 1112000000 1979 1127000000 1980 1090000000 1981 807000000 1982 725000000 1983 529000000 1984 462000000 1985 922000000 1986 1382000000 1987 1029000000 1988 899000000 1989 499000000 1990 227000000 1991 76000000 1992 100000000 1993 4000000 1994 74000000 1995 250000000 1996 102000000 1997 1000000 1998 3000000 1999 25000000 2000 148000000 2001 33000000 2002 256000000 2003 347000000 2004 223000000 2005 103000000 2006 439000000 2007 966000000 2008 633000000 2009 191000000 2010 169000000 2011 137000000 2012 223000000 2013 142000000 2014 258000000 2015 140000000 2016 47000000 2017 128000000 2018 57000000 2019 264000000 2020 143000000 2021 74000000 2022 639000000