Year	US Dollars adjusted for inflation)
1960	304.71069
1961	315.39375
1962	321.59842
1963	340.93167
1964	357.54282
1965	384.75433
1966	396.53513
1967	407.03329
1968	424.96506
1969	436.47668
1970	473.07741
1971	462.58108
1972	453.79056
1973	472.58623
1974	475.65377
1975	481.45746
1976	491.38136
1977	495.42293
1978	518.85173
1979	521.44874
1980	556.31062
1981	580.81674
1982	598.40312
1983	617.85002
1984	627.81996
1985	653.57982
1986	667.49758
1987	688.22187
1988	717.94598
1989	731.12073
1990	741.80145
1991	757.86886
1992	794.62099
1993	787.79411
1994	796.63057
1995	815.33594
1996	833.7471
1997	821.66182
1998	822.44304
1999	832.69779
2000	848.63178
2001	846.64237
2002	855.49855
2003	878.44152
2004	923.9233
2005	974.5373
2006	1013.76537
2007	1041.28938
2008	1037.57514
2009	1045.20793
2010	1040.14227
2011	1046.49355
2012	1060.50137
2013	1083.96701
2014	1111.19596
2015	1140.20627
2016	1179.41401
2017	1222.52391