Year	US Dollars adjusted for inflation)
1960	17664.2048
1961	17861.9356
1962	18780.56413
1963	19389.15562
1964	20301.65991
1965	21260.63153
1966	22242.41871
1967	22482.64971
1968	23294.30239
1969	24188.42626
1970	24629.21556
1971	25262.44135
1972	26216.59128
1973	27571.29253
1974	28080.94072
1975	28057.04789
1976	29128.01409
1977	29783.26792
1978	30651.63255
1979	31502.0443
1980	31769.78349
1981	32477.29554
1982	31060.645
1983	31549.8017
1984	33099.37445
1985	34345.61396
1986	34737.27532
1987	35689.03422
1988	36791.75964
1989	36981.27877
1990	36489.26635
1991	35231.02121
1992	35108.51904
1993	35648.47799
1994	36893.98189
1995	37569.46824
1996	37765.73245
1997	38967.9531
1998	40131.70183
1999	41856.04559
2000	43638.28315
2001	43964.95459
2002	44883.8284
2003	45239.81139
2004	46170.9202
2005	47181.56239
2006	48035.03579
2007	48552.69643
2008	48510.56777
2009	46543.7922
2010	47447.47602
2011	48456.96457
2012	48724.2458
2013	49359.42247
2014	50221.84198
2015	50303.83685
2016	50407.34133
2017	51315.88897