Year	US Dollars adjusted for inflation)
1991	11254.671
1992	11079.572
1993	11491.695
1994	11069.488
1995	11904.125
1996	12751.177
1997	12712.654
1998	12955.044
1999	13241.437
2000	14321.141
2001	15323.997
2002	15787.471
2003	16330.211
2004	16930.225
2005	17481.666
2006	17567.969
2007	18860.316
2008	19068.469
2009	17960.484
2010	18028.58
2011	19308.332
2012	19841.666
2013	19161.691
2014	19216.844
2015	19414.873
2016	20654.924
2017	21233.66
2018	21543.447
2019	21880.979
2020	22227.918
2021	22607.619
2022	23027.857