Year	US Dollars adjusted for inflation)
1970	1186.00263
1971	1311.12729
1972	1342.36546
1973	1420.32569
1974	1457.12744
1975	1609.99335
1976	1528.02232
1977	1496.02209
1978	1469.29359
1979	1468.91392
1980	1602.42667
1981	1784.10486
1982	1754.30791
1983	1723.93662
1984	1771.87406
1985	1773.57916
1986	1912.02955
1987	2098.52708
1988	2142.10513
1989	2325.06834
1990	2720.02953
1991	2692.12171
1992	2716.37079
1993	2746.21316
1994	2759.14267
1995	2835.03905
1996	2881.07517
1997	2904.69558
1998	2916.38908
1999	2946.11067
2000	2953.2323
2001	2952.50837
2002	3059.01387
2003	3158.8261
2004	3250.39922
2005	3411.67334
2006	3568.85728
2007	3668.48073
2008	3633.31559
2009	3622.112
2010	3690.23923
2011	3704.14066
2012	3807.74132
2013	3977.97643
2014	3980.77445
2015	3923.88968
2016	3906.26188
2017	3914.01686