Year	US Dollars adjusted for inflation)
1960	791.08535
1961	888.01585
1962	868.93504
1963	827.27338
1964	1025.95706
1965	1157.16553
1966	1126.33856
1967	1132.81205
1968	1212.26355
1969	1191.97261
1970	1296.36165
1971	1282.25462
1972	1236.29234
1973	1145.80653
1974	1248.41135
1975	1150.53495
1976	1213.35833
1977	1156.83529
1978	1118.43301
1979	1138.83473
1980	1143.86
1981	1149.71163
1982	1090.89903
1983	1099.59489
1984	1034.2349
1985	1035.63975
1986	1064.72662
1987	1055.37224
1988	1044.48609
1989	1065.01874
1990	1018.27052
1991	1009.10877
1992	1001.02076
1993	1031.7071
1994	972.88075
1995	1038.26412
1996	1066.51937
1997	992.59553
1998	989.10332
1999	1033.13926
2000	998.10697
2001	988.47025
2002	966.47293
2003	995.19465
2004	1022.75037
2005	1083.19527
2006	1251.63016
2007	1251.15438
2008	1229.45439
2009	1182.37837
2010	1203.38366
2011	1223.3446
2012	1256.20197
2013	1293.55549
2014	1326.15865
2015	1306.64958
2016	1296.0074
2017	1305.20504