Year	US Dollars adjusted for inflation)
1960	1429.99798
1961	1510.25819
1962	1547.83496
1963	1446.47787
1964	1461.71235
1965	1474.62735
1966	1454.05902
1967	1444.12831
1968	1511.09974
1969	1579.01468
1970	1630.60765
1971	1704.77839
1972	1795.67901
1973	1884.33893
1974	1971.46356
1975	2060.64291
1976	2018.7081
1977	1785.01904
1978	1844.32811
1979	1967.48494
1980	2248.05702
1981	2567.76337
1982	3081.76606
1983	3168.04877
1984	3292.42655
1985	3162.20222
1986	2864.09216
1987	2791.56319
1988	2764.4173
1989	2760.26451
1990	2713.10129
1991	2703.519
1992	2699.5731
1993	2600.98948
1994	2391.31033
1995	2418.42675
1996	2452.13807
1997	2368.34013
1998	2387.5613
1999	2260.72982
2000	2364.61292
2001	2387.84864
2002	2430.28515
2003	2383.35912
2004	2395.81962
2005	2503.31205
2006	2573.50988
2007	2447.51163
2008	2496.50231
2009	2595.7485
2010	2737.34233
2011	2751.91068
2012	2782.11188
2013	2806.34743
2014	2922.97318
2015	2925.52775
2016	2771.39734
2017	2576.39612