Year	US Dollars adjusted for inflation)
1991	29359.182
1992	28079.844
1993	29442.68
1994	31089.049
1995	34305.414
1996	35320.758
1997	36359.152
1998	37039.789
1999	39552.23
2000	41305.223
2001	41666.25
2002	42816.059
2003	45258.004
2004	44764.645
2005	46384.281
2006	48376.395
2007	50443.336
2008	51863.098
2009	48414.293
2010	49713.004
2011	51473.855
2012	50663.898
2013	50975.801
2014	52019.625
2015	53094.977
2016	54495.574
2017	56868.656
2018	59521.508
2019	62033.387
2020	64691.145
2021	67330.969
2022	70129.578