Year	US Dollars adjusted for inflation)
1960	956.45604
1961	947.82524
1962	955.91038
1963	970.05506
1964	982.05225
1965	979.14228
1966	1000.55475
1967	870.27322
1968	903.18054
1969	924.18438
1970	928.96
1971	936.87028
1972	937.08888
1973	961.35558
1974	1036.10148
1975	1121.25235
1976	1030.33584
1977	1139.00371
1978	1350.003
1979	1390.01137
1980	1322.60836
1981	1502.40773
1982	1566.73192
1983	1623.54003
1984	1691.65181
1985	1772.07232
1986	1833.98994
1987	1739.59313
1988	1554.722
1989	1480.75685
1990	1349.63265
1991	1261.03936
1992	1187.65853
1993	1063.4615
1994	1056.98901
1995	1065.11953
1996	1083.28482
1997	1111.55138
1998	1132.95203
1999	1152.35455
2000	1163.43141
2001	1183.43807
2002	1201.91208
2003	1224.16103
2004	1272.8512
2005	1264.1544
2006	1272.88267
2007	1299.29093
2008	1308.2355
2009	1300.84144
2010	1309.12221
2011	1326.64601
2012	1349.95171
2013	1385.23544
2014	1428.21567
2015	1469.63774
2016	1495.44336
2017	1503.5346