Year	US Dollars adjusted for inflation)
1991	2469.056
1992	2254.066
1993	1648.917
1994	1201.929
1995	1562.527
1996	1519.455
1997	1396.368
1998	1290.596
1999	1192.025
2000	1094.649
2001	979.72
2002	1441.063
2003	1517.787
2004	1478.344
2005	1530.476
2006	1594.233
2007	1750.71
2008	1808.646
2009	2083.618
2010	2231.092
2011	2267.575
2012	2454.965
2013	2382.119
2014	2290.472
2015	2201.215
2016	2151.124
2017	2150.964
2018	2172.427
2019	2205.804
2020	2240.608
2021	2298.408
2022	2358.707