Year US Dollars adjusted for inflation) 1966 172396307.27589 1967 172396307.27589 1968 188905224.98734 1969 193506054.96713 1970 205414120.70043 1971 205278799.97178 1972 205774968.64405 1973 224809830.7602 1974 238025936.74163 1975 267525512.41365 1976 287191916.7268 1977 297070101.13554 1978 315834374.59045 1979 311639515.59597 1980 331179561.31345 1981 342180995.3235 1982 339564738.84034 1983 376520342.79188 1984 389831305.71351 1985 386664843.7798 1986 402483576.05882 1987 412361861.66003 1988 430822588.50663 1989 456222690.08507 1990 472459105.27773 1991 487138595.14571 1992 503597492.97993 1993 518766358.42578 1994 519567054.83335 1995 524148847.43001 1996 535803536.02109 1997 562057904.42009 1998 581729922.71541 1999 618960633.79189 2000 653003469.72837 2001 690877672.5125 2002 668424146.033 2003 714344883.54777 2004 764706197.36932 2005 757505143.31315 2006 766020256.36949 2007 793834647.46263 2008 839358222.13654 2009 893494274.62034 2010 951806368.69913 2011 910925126.11618 2012 961934758.08617 2013 1008001063.16696 2014 1017073073.5758 2015 1060807213.42974 2016 1084318240.80394 2017 1122269380.66197