Year	US Dollars adjusted for inflation)
1960	257.21674
1961	257.5164
1962	291.70995
1963	316.75881
1964	336.46442
1965	337.14725
1966	329.23833
1967	357.90842
1968	349.40892
1969	347.62037
1970	347.95595
1971	358.32556
1972	350.32754
1973	433.60778
1974	470.67637
1975	397.5973
1976	430.64174
1977	511.09734
1978	588.88198
1979	590.11384
1980	559.26106
1981	549.07574
1982	559.53426
1983	557.25849
1984	575.14585
1985	578.14048
1986	594.06051
1987	588.35376
1988	628.74096
1989	654.30574
1990	681.78519
1991	715.63886
1992	750.45192
1993	761.60525
1994	792.28675
1995	804.83909
1996	837.56356
1997	857.46275
1998	860.73731
1999	855.84806
2000	880.37168
2001	903.38478
2002	902.09984
2003	935.47122
2004	943.61318
2005	968.39991
2006	1001.08707
2007	1040.66757
2008	1101.00442
2009	1113.98481
2010	1169.26784
2011	1235.66278
2012	1293.63341
2013	1300.40615
2014	1323.23773
2015	1338.53537
2016	1352.47671
2017	1409.21695