Year	US Dollars adjusted for inflation)
1991	55388.562
1992	55477.445
1993	57495.508
1994	57789.949
1995	57909.949
1996	58514.402
1997	59650.16
1998	60541.504
1999	62625.25
2000	62890.957
2001	62935.117
2002	63973.738
2003	65620.492
2004	65938.461
2005	66049.641
2006	66367.719
2007	66915.789
2008	65698.43
2009	66259.383
2010	66884.258
2011	67213.367
2012	68394.258
2013	68439.859
2014	68752.789
2015	69651.359
2016	70345.438
2017	71311.797
2018	71874.156
2019	72780.828
2020	73517.914
2021	74255.109
2022	74950.195