Year	US Dollars adjusted for inflation)
1960	5605.19172
1961	5815.23356
1962	5675.06004
1963	5290.76622
1964	5738.59769
1965	6251.32182
1966	6120.71218
1967	6226.99776
1968	6434.95378
1969	6954.76412
1970	7056.84806
1971	7335.75914
1972	7329.92116
1973	7407.36675
1974	7685.85721
1975	7559.14375
1976	7291.84043
1977	7681.01757
1978	7227.56412
1979	7849.36334
1980	8052.68965
1981	7478.13043
1982	6996.96292
1983	7154.41125
1984	7198.71994
1985	6550.15032
1986	6958.75247
1987	7053.98564
1988	6772.22302
1989	6173.68498
1990	5939.75692
1991	6598.72263
1992	7285.42943
1993	7612.68115
1994	7952.71155
1995	7630.02227
1996	7955.12765
1997	8500.94036
1998	8728.94765
1999	8339.89439
2000	8182.6865
2001	7735.49336
2002	6816.73486
2003	7337.79204
2004	7913.74312
2005	8522.52273
2006	9112.11316
2007	9830.68092
2008	10125.12627
2009	9428.50254
2010	10276.2605
2011	10780.01566
2012	10557.88539
2013	10699.19772
2014	10323.20694
2015	10498.59253
2016	10206.24955
2017	10398.09246