Year	US Dollars adjusted for inflation)
1991	2769.6
1992	2398.921
1993	2280.593
1994	2069.08
1995	2131.83
1996	2164.343
1997	2183.721
1998	2190.251
1999	2206.78
2000	2213.825
2001	2166.101
2002	2132.606
2003	2112.115
2004	2016.69
2005	2019.022
2006	2035.643
2007	2072.875
2008	2027.528
2009	2017.698
2010	1858.648
2011	1883.675
2012	1881.091
2013	1906.63
2014	1912.017
2015	1890.365
2016	1871.594
2017	1868.592
2018	1874.591
2019	1884.247
2020	1909.927
2021	1944.458
2022	1981.672