Year	US Dollars adjusted for inflation)
1960	887.79411
1961	864.85124
1962	900.16108
1963	850.99319
1964	818.46305
1965	849.7017
1966	796.27943
1967	784.58786
1968	776.89414
1969	764.70218
1970	786.13833
1971	779.92609
1972	718.18925
1973	700.78356
1974	756.83243
1975	848.10406
1976	957.68202
1977	984.25121
1978	895.4876
1979	822.359
1980	807.0409
1981	837.91003
1982	857.94482
1983	846.65393
1984	778.65304
1985	707.75236
1986	724.88876
1987	805.66061
1988	782.14492
1989	830.22139
1990	764.73151
1991	801.06052
1992	831.79158
1993	847.27673
1994	833.41757
1995	860.00401
1996	886.47576
1997	953.55486
1998	967.40513
1999	969.95695
2000	1003.00205
2001	1038.58143
2002	1074.6393
2003	1125.7644
2004	1137.56308
2005	1189.96099
2006	1275.26203
2007	1385.41003
2008	1455.31837
2009	1464.2546
2010	1476.47809
2011	1592.9644
2012	1797.10607
2013	1832.31378
2014	1837.13836
2015	1881.89526
2016	1923.99532
2017	1959.15352