Year	US Dollars adjusted for inflation)
1991	3949.136
1992	2338.095
1993	2266.533
1994	2484.677
1995	2718.851
1996	3001.815
1997	3180.372
1998	3373.451
1999	3561.796
2000	3808.819
2001	4195.08
2002	4786.231
2003	5491.75
2004	6102.003
2005	6982.201
2006	7963.263
2007	9115.086
2008	9810.747
2009	8411.014
2010	8282.229
2011	8464.15
2012	8969.282
2013	9055.987
2014	9548.983
2015	10023.819
2016	9983.312
2017	10550.481
2018	11011.115
2019	11489.928
2020	11972.442
2021	12515.254
2022	13092.438