Year	US Dollars adjusted for inflation)
1961	3380.63534
1962	3703.48082
1963	4142.29188
1964	4392.21146
1965	4904.75224
1966	4948.77763
1967	4902.65138
1968	4962.70107
1969	5438.13812
1970	5796.16866
1971	6086.20191
1972	6604.23218
1973	7208.91977
1974	7153.32949
1975	7053.51046
1976	8091.35714
1977	8910.54323
1978	9473.42707
1979	10006.13359
1980	10727.28234
1981	11448.69782
1982	11604.83525
1983	12113.00653
1984	13190.82432
1985	13148.67802
1986	14421.62642
1987	16190.08563
1988	17421.0952
1989	17634.15771
1990	18250.90083
1991	19132.2528
1992	20155.19092
1993	21040.4988
1994	21813.70375
1995	21893.6705
1996	21835.03458
1997	22758.30153
1998	21241.43755
1999	21566.91811
2000	23015.88824
2001	22975.03477
2002	23252.44675
2003	24010.46658
2004	25896.62106
2005	27688.69844
2006	29446.23689
2007	31081.54801
2008	31553.61323
2009	30711.48476
2010	32549.99823
2011	33888.49592
2012	34086.32123
2013	35002.51749
2014	35717.67916
2015	36260.59546
2016	36816.14986
2017	37927.13462