Year	US Dollars adjusted for inflation)
1991	2690.511
1992	2569.912
1993	2483.786
1994	2457.93
1995	2476.946
1996	2497.136
1997	2429.747
1998	2436.057
1999	2415.815
2000	2387.797
2001	2449.972
2002	2428.09
2003	2467.374
2004	2563.768
2005	2689.275
2006	2778.052
2007	2881.568
2008	2794.667
2009	2803.792
2010	2943.829
2011	3018.673
2012	3049.27
2013	3122.162
2014	3180.933
2015	3255.46
2016	3336.733
2017	3403.561
2018	3510.734
2019	3644.081
2020	3770.577
2021	3896.193
2022	4029.106