Year	US Dollars adjusted for inflation)
1960	370.59417
1961	382.00477
1962	391.48918
1963	378.55995
1964	407.63312
1965	401.53342
1966	398.70816
1967	378.44833
1968	401.18045
1969	394.3096
1970	406.03071
1971	375.82658
1972	317.7006
1973	323.03959
1974	347.98063
1975	327.10095
1976	337.60269
1977	337.71329
1978	351.70771
1979	358.34779
1980	351.3761
1981	366.66631
1982	364.53822
1983	368.69403
1984	376.20766
1985	378.48746
1986	383.81248
1987	387.75587
1988	386.7756
1989	387.67287
1990	399.48394
1991	403.7538
1992	416.18052
1993	426.30944
1994	433.41234
1995	445.91892
1996	456.23771
1997	466.77254
1998	480.86883
1999	493.25522
2000	509.29343
2001	525.07211
2002	535.24672
2003	550.86281
2004	570.33674
2005	598.61743
2006	630.04818
2007	666.40145
2008	698.56489
2009	725.76626
2010	757.67176
2011	797.41168
2012	839.51369
2013	879.58197
2014	922.16113
2015	971.64199
2016	1029.57798
2017	1093.04927