Year	US Dollars adjusted for inflation)
1960	520.40418
1961	529.29734
1962	503.59908
1963	519.13066
1964	544.42776
1965	563.14644
1966	572.45322
1967	567.38363
1968	577.30549
1969	581.61037
1970	581.23512
1971	560.18011
1972	583.05624
1973	591.05053
1974	596.65771
1975	553.93665
1976	545.14358
1977	557.93223
1978	550.4265
1979	571.07251
1980	593.61956
1981	635.11749
1982	631.52714
1983	587.28763
1984	616.0375
1985	643.58748
1986	638.74904
1987	611.02814
1988	613.23118
1989	577.53988
1990	609.34562
1991	614.00529
1992	610.5509
1993	623.95366
1994	615.12045
1995	631.17122
1996	638.07633
1997	654.54281
1998	660.63178
1999	675.67748
2000	694.24375
2001	709.46936
2002	720.16828
2003	722.6672
2004	732.33542
2005	723.19996
2006	730.27526
2007	752.21521
2008	767.03182
2009	763.15472
2010	757.69591
2011	758.57752
2012	773.18272
2013	805.96716
2014	833.64088
2015	827.83546
2016	837.19904
2017	859.95269