Year	US Dollars adjusted for inflation)
1991	1065.625
1992	1096.786
1993	1132.659
1994	1196.159
1995	1249.542
1996	1308.704
1997	1368.812
1998	1391.892
1999	1460.96
2000	1512.083
2001	1560.747
2002	1615.595
2003	1674.509
2004	1738.39
2005	1814.526
2006	1914.468
2007	1999.684
2008	2093.567
2009	2187.561
2010	2311.116
2011	2440.145
2012	2578.143
2013	2727.177
2014	2875.374
2015	3024.275
2016	3170.674
2017	3328.676
2018	3492.878
2019	3663.934
2020	3842.327
2021	4024.019
2022	4208.831