Year	US Dollars adjusted for inflation)
1960	3175.04524
1961	3134.77887
1962	3230.70183
1963	3440.25941
1964	3542.54761
1965	3556.86992
1966	3862.84218
1967	3950.92109
1968	4119.96213
1969	4187.5061
1970	4221.15828
1971	4350.8108
1972	4563.18033
1973	4600.75085
1974	4744.44819
1975	4967.40408
1976	5362.4973
1977	5421.24946
1978	5380.77604
1979	5228.53725
1980	4986.68681
1981	5111.20014
1982	5174.05955
1983	5310.34194
1984	5544.20358
1985	5659.40092
1986	5936.07721
1987	6375.47509
1988	6404.02378
1989	6308.83887
1990	6774.62597
1991	6709.09836
1992	6932.12472
1993	7343.33115
1994	6889.81699
1995	7315.41315
1996	7731.42516
1997	8186.50639
1998	8244.76341
1999	7842.84764
2000	8237.60871
2001	7631.65013
2002	8003.73838
2003	8332.0275
2004	9009.88607
2005	9692.12957
2006	10251.37718
2007	10638.06334
2008	10599.63117
2009	9973.6633
2010	10672.40016
2011	11683.60448
2012	12052.72008
2013	12866.09535
2014	13312.4552
2015	13898.74884
2016	14117.43687
2017	14933.26521