Year	US Dollars adjusted for inflation)
1991	24124.213
1992	22447.93
1993	20069.891
1994	19654.922
1995	18595.67
1996	18851.242
1997	19398.227
1998	19304.83
1999	19419.773
2000	18833.91
2001	18972.273
2002	19394.004
2003	19961.914
2004	21224.693
2005	21838.918
2006	22116.354
2007	22732.623
2008	23167.34
2009	23372.986
2010	23711.422
2011	24455.828
2012	24500.682
2013	24446.781
2014	24695
2015	23750.723
2016	21128.576
2017	20857.154
2018	21123.6
2019	21720.154
2020	22474.766
2021	23297.242
2022	24116.344