Year US Dollars adjusted for inflation) 1960 1000000 1961 5000000 1962 6000000 1963 6000000 1964 7000000 1965 21000000 1966 21000000 1967 7000000 1968 7000000 1969 6000000 1970 70000000 1971 140000000 1972 4000000 1973 4000000 1974 84000000 1975 267000000 1976 46000000 1977 25000000 1978 38000000 1979 18000000 1980 10000000 1981 132000000 1982 260000000 1983 370000000 1984 244000000 1985 93000000 1986 198000000 1987 158000000 1988 143000000 1989 177000000 1990 117000000 1991 105000000 1992 71000000 1993 104000000 1994 254000000 1995 89000000 1996 113000000 1997 634000000 1998 174000000 1999 46000000 2000 47000000 2001 8000000 2002 18000000 2003 99000000 2004 54000000 2005 113000000 2006 898000000 2007 628000000 2008 626000000 2009 984000000 2010 273000000 2011 997000000 2012 266000000 2013 450000000 2014 962000000 2015 977000000 2016 480000000 2017 820000000 2018 705000000 2019 308000000 2020 971000000 2021 594000000 2022 950000000