Year	US Dollars adjusted for inflation)
1991	69616.125
1992	72145.125
1993	71438.812
1994	71957.062
1995	74088.109
1996	73588.008
1997	73705.406
1998	77508.719
1999	77124.508
2000	78400.688
2001	86387.438
2002	87754.461
2003	88459.875
2004	88756.781
2005	89459.531
2006	87730.641
2007	85893.891
2008	86503.305
2009	89009.789
2010	89159.469
2011	88065.297
2012	85105.219
2013	85377.562
2014	85378.289
2015	83991.547
2016	81700.273
2017	78273.172
2018	74652.336
2019	76708.039
2020	78587.094
2021	79734.562
2022	80516.891