Year	US Dollars adjusted for inflation)
1970	19624.74976
1971	20202.43374
1972	20970.62643
1973	21903.40351
1974	22089.74897
1975	21980.08789
1976	23167.05926
1977	23996.77291
1978	24740.23653
1979	25755.65781
1980	26064.38931
1981	26162.45463
1982	26083.95215
1983	26563.64494
1984	27408.09981
1985	28108.89301
1986	28738.68261
1987	29096.91018
1988	30057.94148
1989	30988.58946
1990	32337.10102
1991	33742.21922
1992	34130.8524
1993	33583.00604
1994	34289.12475
1995	34782.56863
1996	34965.69089
1997	35560.20929
1998	36258.67443
1999	36955.28961
2000	37998.42531
2001	38577.72563
2002	38512.92004
2003	38218.34965
2004	38673.88811
2005	38969.3217
2006	40456.85738
2007	41831.86709
2008	42365.0975
2009	40086.10476
2010	41785.55691
2011	44125.33141
2012	44259.25991
2013	44354.73689
2014	45022.56535
2015	45412.55681
2016	45923.00757
2017	46747.19247