Year US Dollars adjusted for inflation) 1960 872754761.57883 1961 939429715.62765 1962 945708532.63232 1963 932552984.40119 1964 957369182.34146 1965 1087729294.05964 1966 1231842943.3209 1967 1321540202.46429 1968 1296125938.12838 1969 1372368730.47158 1970 1378946466.0453 1971 1602591776.10113 1972 1702454862.85085 1973 1741622587.64614 1974 1866600790.90519 1975 1980217492.28166 1976 2079183440.56383 1977 2181438334.38105 1978 2394020984.03969 1979 2499265827.07471 1980 2509431501.17819 1981 2376679583.05701 1982 2436178658.7173 1983 2526773054.99921 1984 2662215774.51162 1985 2783905186.40297 1986 2777925287.96737 1987 2823073218.20398 1988 2912770477.34736 1989 2951938202.14266 1990 3119971217.88235 1991 3392351938.18952 1992 3143591512.28887 1993 3448263380.33223 1994 3095154943.52291 1995 3612937768.21468 1996 3877284917.91252 1997 4024327811.66064 1998 4181085586.81284 1999 4308285837.60063 2000 4376187775.85659 2001 4158474016.15302 2002 4229168074.99445 2003 4470469156.55829 2004 4712790834.08534 2005 4866839045.27869 2006 5095580480.01871 2007 5584756206.23341 2008 6011416879.86508 2009 6512054306.78509 2010 6959697194.02096 2011 7297524731.2371 2012 7435141416.66523 2013 7821768770.20955 2014 8267609590.40654 2015 8499102658.85552 2016 8710223821.78252 2017 9058635432.71192