Year	US Dollars adjusted for inflation)
1991	9677.956
1992	10959.396
1993	11803.53
1994	11739.326
1995	11614.922
1996	11444.465
1997	11100.36
1998	11121.387
1999	11297.929
2000	11918.573
2001	11718.871
2002	11932.865
2003	12551.78
2004	12639.955
2005	12505.694
2006	12246.329
2007	11699.931
2008	11492.059
2009	11278.458
2010	11351.216
2011	11252.474
2012	11367.552
2013	10954.39
2014	11165.343
2015	11007.392
2016	10320.967
2017	10478.83
2018	10448.268
2019	10421.21
2020	10381.109
2021	10349.749
2022	10330.161