Year	US Dollars adjusted for inflation)
1970	2249.08258
1971	2399.50956
1972	2472.0338
1973	2514.928
1974	2501.70362
1975	2703.06448
1976	2818.1867
1977	3034.88848
1978	3209.5153
1979	3222.57349
1980	3048.24929
1981	3630.29894
1982	3937.56108
1983	4133.52081
1984	4438.8836
1985	4480.27001
1986	4447.00818
1987	4297.29531
1988	4409.31218
1989	4394.01891
1990	4225.94398
1991	3745.23053
1992	3289.982
1993	2784.7255
1994	2790.09867
1995	2844.12054
1996	3051.68284
1997	3121.53877
1998	3112.3453
1999	3291.30449
2000	3473.24349
2001	3572.39606
2002	3613.13636
2003	3741.20641
2004	3949.3478
2005	4385.00248
2006	4908.87933
2007	5261.89673
2008	5475.58107
2009	5550.70597
2010	5676.1414
2011	5824.10363
2012	5985.20153
2013	6133.47373
2014	6182.7737
2015	6444.98011