Year	US Dollars adjusted for inflation)
1970	42137.51899
1971	41883.14121
1972	43051.22318
1973	44201.72808
1974	44648.38222
1975	43158.00761
1976	43079.8158
1977	42958.89386
1978	42339.33407
1979	41041.86678
1980	40495.69802
1981	38896.62594
1982	37756.4209
1983	36776.51496
1984	35820.93175
1985	35095.99254
1986	34744.39245
1987	35204.98946
1988	35546.64955
1989	35831.62082
1990	35780.51967
1991	35291.71141
1992	34278.6471
1993	32766.05967
1994	32633.82513
1995	32917.64882
1996	34175.26007
1997	37293.28241
1998	38595.72321
1999	40035.48245
2000	40801.54213
2001	41420.84618
2002	42396.3024
2003	45519.49238
2004	47032.86689
2005	48831.92936
2006	49708.40049
2007	48710.66462
2008	43900.9517
2009	41979.8659
2010	39736.35406
2011	38205.77109
2012	38190.58659
2013	39104.30185
2014	40785.04923
2015	41765.92035
2016	42958.55839
2017	43942.93819