Year	US Dollars adjusted for inflation)
1980	673.82264
1981	718.37873
1982	724.55242
1983	777.62363
1984	791.31696
1985	844.22653
1986	854.59684
1987	878.49895
1988	917.68542
1989	954.02084
1990	941.80142
1991	933.05324
1992	1008.71436
1993	1067.06634
1994	1237.73976
1995	1377.41961
1996	1496.60967
1997	1624.70297
1998	1787.99912
1999	1946.8514
2000	2179.98481
2001	2185.25382
2002	2257.31667
2003	2310.49442
2004	2505.17251
2005	2639.38264
2006	2813.1854
2007	3202.37926
2008	3378.6462
2009	3300.55099
2010	3312.82598
2011	3405.78186
2012	3403.03108
2013	3389.94
2014	3369.64271
2015	3362.20997
2016	3447.56008
2017	3536.95687