Year	US Dollars adjusted for inflation)
1960	5474.62153
1961	5539.01895
1962	5384.39296
1963	5329.62514
1964	5397.71013
1965	5395.15089
1966	5502.52337
1967	5248.84142
1968	5300.41824
1969	5570.5764
1970	5670.61071
1971	5639.34366
1972	5558.67813
1973	5572.70756
1974	5730.02016
1975	6066.26498
1976	6280.02226
1977	6336.46762
1978	6633.19981
1979	6995.61218
1980	7354.22754
1981	7419.9144
1982	6652.26758
1983	5930.28403
1984	5824.94647
1985	5872.57095
1986	6349.60397
1987	6814.58134
1988	6872.38926
1989	6903.525
1990	6877.28717
1991	7070.5059
1992	7576.14609
1993	7720.4666
1994	8221.94944
1995	8044.64175
1996	8432.62114
1997	9089.1229
1998	9438.88305
1999	9207.79229
2000	8997.66012
2001	8636.54527
2002	7967.16256
2003	8036.47922
2004	8442.54956
2005	9068.23921
2006	9424.51699
2007	10014.87202
2008	10698.05201
2009	11112.45603
2010	11938.212
2011	12512.91348
2012	12913.10408
2013	13467.43784
2014	13856.69518
2015	13859.40739
2016	14042.63899
2017	14362.56121