Year	US Dollars adjusted for inflation)
1991	22155.084
1992	21104.023
1993	20148.371
1994	19871.012
1995	19917.629
1996	20472.77
1997	21273.93
1998	22347.166
1999	23474.133
2000	24434.793
2001	24691.949
2002	26053.641
2003	28876.432
2004	29506.43
2005	30322.352
2006	33419.039
2007	34569.77
2008	35182.105
2009	34058.027
2010	35089
2011	34396.387
2012	34898.836
2013	35250.98
2014	34750.824
2015	34777.996
2016	32940.875
2017	33896.625
2018	35225.457
2019	36466.336
2020	37284.219
2021	37927.938
2022	38578.961