Year	US Dollars adjusted for inflation)
1960	18142.87588
1961	19083.55897
1962	19786.85153
1963	20723.93784
1964	21972.8347
1965	22598.66626
1966	22852.67116
1967	23441.23789
1968	24157.94022
1969	25190.51956
1970	26464.33574
1971	26531.14094
1972	27058.29384
1973	28083.51421
1974	28897.70718
1975	29517.92516
1976	29721.96431
1977	29143.83431
1978	29568.09094
1979	30636.57753
1980	31094.20624
1981	31198.19672
1982	31569.69716
1983	32155.16194
1984	33484.73457
1985	34151.67484
1986	34989.33778
1987	36042.3586
1988	36795.19717
1989	37520.86883
1990	37513.0798
1991	36831.27389
1992	36191.65081
1993	35238.79397
1994	36419.45857
1995	37686.82527
1996	38198.01955
1997	39283.44555
1998	40921.15246
1999	42741.62286
2000	44693.7366
2001	45270.78107
2002	46059.36679
2003	46983.07726
2004	48820.60609
2005	49996.17522
2006	52046.48151
2007	53421.02024
2008	52711.19827
2009	49554.34343
2010	52076.25591
2011	53061.56857
2012	52519.68044
2013	52722.9123
2014	53561.89212
2015	55395.05871
2016	56473.02278
2017	56935.18827