Year	US Dollars adjusted for inflation)
1960	1038.93255
1961	903.12577
1962	1067.05938
1963	1094.00646
1964	1039.40291
1965	1021.60854
1966	1060.78109
1967	1020.81586
1968	1034.91831
1969	1099.73364
1970	1066.82856
1971	1100.48242
1972	1073.06448
1973	1129.93568
1974	1134.36376
1975	1048.60913
1976	965.25848
1977	944.98628
1978	869.12856
1979	848.8108
1980	844.54953
1981	842.59842
1982	818.22934
1983	809.69551
1984	833.53298
1985	816.0797
1986	832.2303
1987	831.62437
1988	811.98931
1989	777.24287
1990	702.08295
1991	619.68274
1992	533.35988
1993	443.84366
1994	411.28179
1995	400.99743
1996	385.99283
1997	355.50414
1998	341.8498
1999	319.70793
2000	290.16769
2001	276.33733
2002	276.25489
2003	282.84261
2004	292.54195
2005	300.75145
2006	306.71818
2007	315.45883
2008	324.24209
2009	322.62049
2010	334.23174
2011	345.48122
2012	357.81641
2013	375.44427
2014	397.58202
2015	411.27914
2016	407.56371
2017	409.11737