Year	US Dollars adjusted for inflation)
1966	3788.46271
1967	3808.21022
1968	3977.17642
1969	4144.89889
1970	4580.64121
1971	4622.6539
1972	5368.25457
1973	4991.5537
1974	4705.47888
1975	4624.67754
1976	4257.66731
1977	4096.33765
1978	4045.28428
1979	3951.68312
1980	3673.59071
1981	3711.29386
1982	3724.12639
1983	3731.22709
1984	3617.5444
1985	3466.48121
1986	3497.22372
1987	3743.93266
1988	3869.54421
1989	4122.68407
1990	4266.58118
1991	4437.41214
1992	4484.41548
1993	4860.54416
1994	4880.19979
1995	4946.86936
1996	4893.88855
1997	4791.62933
1998	4635.78865
1999	4642.55106
2000	4644.5969
2001	4671.63842
2002	4732.35568
2003	4874.99504
2004	4910.08249
2005	4925.27739
2006	5039.41363
2007	5083.60399
2008	5015.85384
2009	4774.45119
2010	4682.52125
2011	4742.91841
2012	4694.24726
2013	4699.76846
2014	4714.8611
2015	4740.63823
2016	4790.03911
2017	4798.2085