Year US Dollars adjusted for inflation) 1960 4592975693.64824 1961 4655503637.61439 1962 4539542515.26964 1963 4688094181.90156 1964 5260700256.40491 1965 6136473014.94653 1966 5794652456.69258 1967 6253571345.18771 1968 6331636551.24971 1969 6303972629.29686 1970 6606381313.71036 1971 6600697212.89946 1972 7208546517.68777 1973 7139196785.55794 1974 7598115674.05307 1975 7425689437.36841 1976 7887639740.67666 1977 7527629234.32907 1978 7569314523.35786 1979 7340423672.63555 1980 7563251214.27529 1981 8029749327.71883 1982 7803889933.50149 1983 7650411665.38116 1984 7624642408.95541 1985 7747804048.27916 1986 7803889933.50149 1987 8012695628.60895 1988 8515952929.89514 1989 8428791999.33293 1990 8388243438.74424 1991 8385212482.54153 1992 8240070980.38398 1993 8800171186.75867 1994 8041117529.34064 1995 8274122490.67145 1996 8788652644.30593 1997 9123852515.06118 1998 9088657605.63674 1999 9511297429.69711 2000 9881983406.64151 2001 10407395447.2494 2002 10876354172.3124 2003 11631714139.7928 2004 12449702236.768 2005 13350512768.1307 2006 14405696504.1379 2007 15608923120.2185 2008 16822344541.4938 2009 18373423318.2548 2010 20265556273.582 2011 21393258426.9663 2012 23018636259.4067 2013 24183235704.905 2014 25318838464.90589 2015 26058118446.5615 2016 27037168289.1747 2017 28139396718.851