Year	US Dollars adjusted for inflation)
1960	12195.32806
1961	13030.45988
1962	13328.08192
1963	13668.94393
1964	14305.21315
1965	15013.66297
1966	15312.41189
1967	15560.01801
1968	15847.10131
1969	17377.44069
1970	18373.79065
1971	18783.12629
1972	20116.00577
1973	21399.00038
1974	21976.2295
1975	22273.79308
1976	22283.2264
1977	22274.20034
1978	22858.81489
1979	24424.29963
1980	25660.58789
1981	25882.20721
1982	26532.20918
1983	27197.71462
1984	27922.28393
1985	28789.48671
1986	29478.42779
1987	30441.13158
1988	31934.10751
1989	33437.88441
1990	33514.92303
1991	31360.95439
1992	30148.43501
1993	29782.54353
1994	30822.60836
1995	31997.00417
1996	33059.09669
1997	35021.58663
1998	36824.84797
1999	38372.22204
2000	40450.37337
2001	41399.94358
2002	41993.68902
2003	42729.02447
2004	44277.8427
2005	45353.26
2006	47011.6576
2007	49239.19396
2008	49363.6972
2009	45065.75349
2010	46202.41516
2011	47171.02206
2012	46277.55628
2013	45715.64682
2014	45239.3688
2015	45151.51216
2016	45983.31333
2017	47057.61905