Year US Dollars adjusted for inflation) 1960 1942538097.61501 1961 2149750529.0866 1962 2374441850.10686 1963 2624329421.19867 1964 2899925138.96336 1965 3202259632.40815 1966 3492766343.41697 1967 3828006034.15819 1968 4150391651.56298 1969 4523165825.37743 1970 4267622809.06613 1971 4337036067.07757 1972 4185355346.26048 1973 4502084992.61466 1974 3747795359.80247 1975 3193004478.75685 1976 3358567667.13532 1977 3666042159.83818 1978 4185869346.1863 1979 5280026115.10758 1980 5622978696.80712 1981 5104179904.68398 1982 5446103697.7852 1983 5642002872.57775 1984 6441539485.04816 1985 6752613028.89395 1986 6873957500.38138 1987 7079112091.74079 1988 7242618886.04269 1989 7729853744.61442 1990 7606466024.82856 1991 7288379997.0845 1992 7009556990.78308 1993 7031132893.55112 1994 7252537375.65963 1995 7570107957.44229 1996 7889833789.55325 1997 8052541057.62784 1998 8432337724.51058 1999 9034753608.33579 2000 9409627491.5515 2001 9656694580.55466 2002 9917865835.46098 2003 9792432526.23075 2004 9878884030.66906 2005 10214307272.5531 2006 10471385975.1648 2007 10622859247.2052 2008 10375987506.7603 2009 9942763009.20556 2010 10095760000 2011 10157636655.8148 2012 10471171091.7508 2013 10428194408.9434 2014 10412761872.8443 2015 10521571019.7704 2016 10343803831.7942 2017 10492464084.5963