Year	US Dollars adjusted for inflation)
1960	2980.5765
1961	3237.90789
1962	3425.98883
1963	3580.69341
1964	3808.94361
1965	4348.99402
1966	4711.41238
1967	5120.90101
1968	5723.74583
1969	6483.03429
1970	7014.93821
1971	7816.18698
1972	8707.10144
1973	9198.8522
1974	9524.88796
1975	9026.08363
1976	10265.70022
1977	9544.85786
1978	7938.61912
1979	6859.86105
1980	4789.58418
1981	4366.70269
1982	5333.98173
1983	5556.96
1984	4864.83493
1985	4773.45427
1986	4119.69823
1987	3989.24536
1988	3640.43115
1989	3739.72885
1990	4147.36065
1991	4567.57197
1992	4625.68803
1993	4615.92013
1994	4490.28305
1995	4528.29554
1996	4684.64588
1997	4622.59719
1998	4635.30393
1999	4591.46152
2000	4781.85082
2001	4749.80631
2002	5028.43736
2003	5401.7502
2004	5572.90572
2005	5684.9575
2006	5901.64179
2007	6311.7895
2008	6256.87797
2009	6247.69166
2010	6531.92743
2011	6622.67294
2012	6052.51683
2013	5964.17905
2014	6161.10352
2015	6007.00489
2016	6733.9125
2017	6946.85658