Year	US Dollars adjusted for inflation)
1960	897.52352
1961	923.79535
1962	906.90173
1963	932.44493
1964	892.52051
1965	906.55035
1966	891.40988
1967	935.86205
1968	924.52065
1969	1006.62167
1970	1194.17139
1971	1257.98687
1972	1317.31164
1973	1306.50634
1974	1347.44433
1975	1279.40998
1976	1246.04643
1977	1126.00339
1978	1062.62602
1979	1062.99421
1980	1175.13524
1981	1274.68338
1982	1259.19598
1983	1230.39367
1984	1161.40584
1985	1196.6352
1986	1178.55863
1987	1151.44671
1988	1198.30453
1989	1222.64726
1990	1272.05103
1991	1309.005
1992	1164.2536
1993	1152.45044
1994	1234.96618
1995	1214.69346
1996	1317.50986
1997	1330.67629
1998	1347.9718
1999	1317.96884
2000	1261.16309
2001	1264.43062
2002	1139.59007
2003	935.93016
2004	871.66711
2005	811.56295
2006	772.47259
2007	732.76998
2008	593.12725
2009	652.28873
2010	719.97952
2011	813.83401
2012	913.53063
2013	942.03866
2014	939.78027
2015	933.50327
2016	917.56372
2017	927.39866