Year	US Dollars adjusted for inflation)
1960	1299.94925
1961	1276.28521
1962	1301.35336
1963	1383.48257
1964	1421.37894
1965	1459.25359
1966	1367.48827
1967	1127.44303
1968	1089.14462
1969	1322.7572
1970	1616.18743
1971	1803.95614
1972	1821.18208
1973	1873.16322
1974	2029.44666
1975	1871.75787
1976	1983.03689
1977	2040.26382
1978	1865.00944
1979	1932.56837
1980	1957.09878
1981	1654.63342
1982	1595.1456
1983	1476.66534
1984	1410.67882
1985	1489.42397
1986	1324.11519
1987	1151.12561
1988	1205.80462
1989	1250.68277
1990	1374.43676
1991	1331.612
1992	1304.09028
1993	1298.44095
1994	1277.99293
1995	1242.73805
1996	1272.72925
1997	1276.24082
1998	1278.65132
1999	1253.04789
2000	1287.05926
2001	1310.50597
2002	1326.24297
2003	1426.90331
2004	1860.06238
2005	1875.02964
2006	1976.70847
2007	2056.83859
2008	2128.66663
2009	2216.49939
2010	2327.32067
2011	2376.63877
2012	2412.86078
2013	2475.94806
2014	2563.09212
2015	2562.52222
2016	2455.91856
2017	2412.41