Year	US Dollars adjusted for inflation)
1991	3406.106
1992	3014.688
1993	2977.917
1994	3181.815
1995	3128.789
1996	3403.982
1997	3463.165
1998	3518.855
1999	3456.299
2000	3169.462
2001	3057.76
2002	2652.642
2003	2103.792
2004	1898.553
2005	1766.411
2006	1678.283
2007	1589.962
2008	1285.399
2009	1375.411
2010	1559.236
2011	1774.837
2012	1967.568
2013	2018.032
2014	2021.109
2015	1997.944
2016	1959.816
2017	1945.924
2018	1911.916
2019	1869.473
2020	1811.065
2021	1759.499
2022	1736.256