Year	US Dollars adjusted for inflation)
1991	14151.944
1992	14619.938
1993	13874.548
1994	13642.936
1995	13841.101
1996	13959.362
1997	14196.476
1998	14048.445
1999	13949.041
2000	14005.569
2001	13862.561
2002	14324.244
2003	14688.298
2004	16315.792
2005	16385.352
2006	17190.311
2007	17962.781
2008	18046.842
2009	17674.459
2010	18361.816
2011	18363.088
2012	17745.197
2013	18601.398
2014	18988.15
2015	19721.625
2016	20318.986
2017	19714.455
2018	19790.607
2019	19949.998
2020	20215.027
2021	20503.5
2022	20813.355