Year	US Dollars adjusted for inflation)
1991	1524.02
1992	1597.995
1993	1306.647
1994	1398.528
1995	1370.647
1996	1360.069
1997	1393.305
1998	1442.362
1999	1382.165
2000	1321.971
2001	1428.796
2002	1493.742
2003	1652.882
2004	2130.991
2005	2408.07
2006	2339.471
2007	2337.308
2008	2328.746
2009	2345.889
2010	2577.394
2011	2486.387
2012	2619.174
2013	2670.768
2014	2756.966
2015	2706.937
2016	2431.138
2017	2361.733
2018	2392.835
2019	2456.47
2020	2506.214
2021	2530.629
2022	2556.838