Year	US Dollars adjusted for inflation)
1990	3102.46278
1991	3063.72991
1992	2763.64748
1993	2547.87401
1994	2252.41245
1995	2024.69474
1996	2088.35155
1997	2336.31168
1998	2544.63465
1999	2642.24233
2000	2808.694
2001	2956.54062
2002	3125.53891
2003	3369.17211
2004	3780.63623
2005	4164.36201
2006	4608.93209
2007	5028.32002
2008	5560.3819
2009	5583.93852
2010	6029.3968
2011	6375.34504
2012	6491.67338
2013	6557.10657
2014	6664.09725
2015	6398.68974
2016	6229.20674
2017	6375.81729