Year	US Dollars adjusted for inflation)
1960	5831.71964
1961	6133.84304
1962	6507.17318
1963	6917.08642
1964	7261.86733
1965	7808.22557
1966	8294.66529
1967	8741.99378
1968	9138.25539
1969	9912.74642
1970	10611.38977
1971	11106.28328
1972	11670.34515
1973	12145.55266
1974	12242.54226
1975	11940.19688
1976	12477.86121
1977	13028.4696
1978	13750.26932
1979	14656.3853
1980	15097.65274
1981	15098.8223
1982	14705.50574
1983	14215.00755
1984	14908.94867
1985	15221.40689
1986	15826.46642
1987	16582.42296
1988	17396.87084
1989	17986.61628
1990	17320.80424
1991	17595.03203
1992	18279.71042
1993	18968.29546
1994	19579.58281
1995	20282.03243
1996	20519.79924
1997	21322.11083
1998	22372.41389
1999	23460.45538
2000	24161.16088
2001	25631.62101
2002	25833.1943
2003	25830.82179
2004	28084.92943
2005	27566.58862
2006	27293.3469
2007	27134.54803
2008	26790.82937
2009	26411.41473
2010	26435.74019
2011	26647.3776
2012	26979.66224
2013	27206.8739
2014	27325.65191
2015	27501.60768
2016	27308.99388