Year US Dollars adjusted for inflation) 1960 1951429897.99617 1961 2086084132.59966 1962 2154930301.87333 1963 2256433797.25633 1964 2351485560.0305 1965 2496524595.82458 1966 2546242966.40407 1967 2779233547.71544 1968 2905051502.62167 1969 3041622372.30926 1970 3210536611.88237 1971 3388341007.50663 1972 3613031979.20827 1973 3876884944.96367 1974 4201827042.79298 1975 4489754917.87459 1976 4827651607.04993 1977 5382545822.29155 1978 6029997723.43965 1979 6745284915.7843 1980 7535302529.434 1981 8226324347.06571 1982 8111351780.5015 1983 7864554340.5142 1984 8086067334.49498 1985 8451811131.1122 1986 8871429664.43721 1987 9544088464.20912 1988 10108656807.1365 1989 10809712769.3228 1990 11255427805.2664 1991 11648653076.2121 1992 11846264089.9199 1993 12431038262.6612 1994 13092110918.128 1995 13985360485.569 1996 14205460613.319 1997 14808128865.4059 1998 14818203594.5183 1999 14615776377.2109 2000 14277545968.157 2001 14158462966.9553 2002 14155432776.2627 2003 14767053626.3267 2004 15366214891.1453 2005 15694050960.1953 2006 16448482863.7657 2007 17340257505.5353 2008 18442944771.8053 2009 17711553669.7976 2010 20030528042.9171 2011 20900335112.0465 2012 20641386542.412 2013 23538668873.18641 2014 24650243376.482 2015 25380441836.5634 2016 26400622642.9371 2017 26604449092.10169