Year	US Dollars adjusted for inflation)
1991	2081.898
1992	2097.539
1993	2146.913
1994	2165.809
1995	2204.198
1996	2258.318
1997	2306.346
1998	2367.261
1999	2457.695
2000	2487.199
2001	2479.564
2002	2480.664
2003	2496.781
2004	2522.219
2005	2555.885
2006	2603.604
2007	2643.762
2008	2810.654
2009	2866.999
2010	3013.121
2011	3309.745
2012	3484.665
2013	3574.547
2014	3620.604
2015	3667.594
2016	3706.246
2017	3919.278
2018	4103.923
2019	4257.326
2020	4385.759
2021	4515
2022	4647.711