Year	US Dollars adjusted for inflation)
1991	37706.418
1992	40086.777
1993	42315.516
1994	44270.984
1995	45013.863
1996	46093.043
1997	47247.766
1998	44540.824
1999	45547.461
2000	47562.16
2001	47190.43
2002	48258.312
2003	49877.453
2004	53174.656
2005	56109.191
2006	58932.98
2007	61486.508
2008	62280.062
2009	61284.621
2010	65332.867
2011	66712.227
2012	66460.867
2013	67302.023
2014	68693.07
2015	69845.062
2016	71015.031
2017	73211.305
2018	74933.32
2019	76586.891
2020	78315.742
2021	80311.586
2022	82456.016