Year	US Dollars adjusted for inflation)
1991	3092.859
1992	2915.597
1993	2610.205
1994	2591.034
1995	2626.681
1996	2686.126
1997	2751.946
1998	2806.153
1999	2836.825
2000	2869.669
2001	2916.211
2002	2926.761
2003	2936.835
2004	2936.985
2005	2892.462
2006	2879.305
2007	2865.055
2008	2870.299
2009	2848.45
2010	2873.153
2011	2908.925
2012	2957.095
2013	3033.942
2014	3123.24
2015	3208.362
2016	3258.527
2017	3286.583
2018	3330.628
2019	3393.858
2020	3470.501
2021	3544.367
2022	3618.998