Year	US Dollars adjusted for inflation)
1960	612.25519
1961	622.18383
1962	666.65821
1963	708.6353
1964	689.26691
1965	716.00677
1966	693.11119
1967	674.43239
1968	658.06781
1969	604.66329
1970	605.90976
1971	622.73876
1972	574.43395
1973	463.48817
1974	490.29275
1975	463.34692
1976	453.36388
1977	474.68501
1978	523.25373
1979	544.64093
1980	517.33179
1981	505.69648
1982	499.29373
1983	462.06172
1984	373.42688
1985	390.88884
1986	404.01805
1987	392.87943
1988	407.93785
1989	399.62464
1990	382.48594
1991	379.73707
1992	343.51296
1993	336.94478
1994	338.59244
1995	335.48075
1996	334.84558
1997	331.89651
1998	353.41724
1999	338.84771
2000	322.14989
2001	332.75554
2002	330.54816
2003	335.66823
2004	323.96997
2005	326.33171
2006	332.71088
2007	330.63321
2008	349.00468
2009	333.69029
2010	348.15151
2011	342.74833
2012	368.94269
2013	373.73685
2014	386.7258
2015	388.31619
2016	392.14894
2017	395.93729