Year	US Dollars adjusted for inflation)
1960	696.27693
1961	692.45299
1962	715.3433
1963	690.11908
1964	659.74431
1965	651.09541
1966	627.46175
1967	620.74477
1968	606.51012
1969	635.70678
1970	634.16906
1971	606.18267
1972	598.84571
1973	535.66548
1974	549.32808
1975	585.86944
1976	591.14508
1977	592.73963
1978	578.8449
1979	445.98348
1980	410.53086
1981	405.9833
1982	418.16294
1983	472.31658
1984	469.83692
1985	556.7753
1986	518.62083
1987	490.77932
1988	548.87544
1989	557.3476
1990	517.13464
1991	543.63884
1992	568.73434
1993	464.2855
1994	494.99987
1995	484.75809
1996	479.04213
1997	489.09526
1998	505.16209
1999	484.08256
2000	462.5286
2001	497.3468
2002	519.27665
2003	573.33437
2004	737.98753
2005	835.19554
2006	812.0086
2007	811.01628
2008	808.889
2009	815.96805
2010	896.56973
2011	867.99906
2012	914.11865
2013	934.70255
2014	967.10278
2015	962.65592
2016	874.76707
2017	823.43489