Year	US Dollars adjusted for inflation)
1976	2343.41252
1977	2456.54853
1978	2517.53795
1979	2561.10373
1980	2264.914
1981	2362.86655
1982	2462.46847
1983	2449.29007
1984	2537.6904
1985	2692.08034
1986	2931.8434
1987	3168.7207
1988	3360.70459
1989	3483.97829
1990	3707.85678
1991	3830.74132
1992	4026.8923
1993	4181.67106
1994	4294.08812
1995	4439.86281
1996	4640.25303
1997	4843.14425
1998	5083.42334
1999	5150.24991
2000	5560.23465
2001	5658.44969
2002	5738.05597
2003	5905.00121
2004	6205.2532
2005	6245.19696
2006	6746.88662
2007	7100.86182
2008	7456.36925
2009	7683.12492
2010	8000.37643
2011	8313.27125
2012	8580.08565
2013	8848.88703
2014	9163.63335
2015	9468.9407
2016	9822.00813
2017	10186.05382