Year	US Dollars adjusted for inflation)
1991	45094.98
1992	46499.84
1993	50586.332
1994	48557.355
1995	48557.926
1996	49354.719
1997	49518.887
1998	50268.473
1999	50426.156
2000	50612.238
2001	48659.875
2002	46973.906
2003	45987.133
2004	45068.027
2005	43833.797
2006	42174.977
2007	41148.223
2008	39606.938
2009	37312.988
2010	36418
2011	36512.215
2012	37207.918
2013	38818.793
2014	39929.566
2015	40051.164
2016	40499.434
2017	40796.613
2018	40879.668
2019	41023.629
2020	41203.48
2021	42291.711
2022	43466.125