Year	US Dollars adjusted for inflation)
1960	390.82973
1961	405.79864
1962	422.17203
1963	435.68989
1964	453.07897
1965	466.26218
1966	481.78585
1967	495.38528
1968	531.21392
1969	592.67139
1970	672.22736
1971	818.68457
1972	1000.80926
1973	1173.45171
1974	1232.45501
1975	1288.41151
1976	1372.39063
1977	1478.52106
1978	1625.44945
1979	1753.75607
1980	1891.40967
1981	1988.88484
1982	2153.10404
1983	2353.79727
1984	2471.15711
1985	2563.03352
1986	2687.31788
1987	2917.43605
1988	3384.48086
1989	3718.48569
1990	3860.0086
1991	4034.26086
1992	4040.42667
1993	4010.78715
1994	4053.43604
1995	4237.5673
1996	4386.85154
1997	4641.80548
1998	4585.73993
1999	4939.59806
2000	4954.77429
2001	4891.91484
2002	5115.89989
2003	5280.21517
2004	5349.00202
2005	5512.81123
2006	5883.89906
2007	6270.47408
2008	6552.77664
2009	5948.85325
2010	6346.1562
2011	6610.33192
2012	6779.3939
2013	7409.42116
2014	7574.2821
2015	7308.76062
2016	7485.04391
2017	7523.21632