Year	US Dollars adjusted for inflation)
1991	1260.072
1992	1289.571
1993	1309.813
1994	1318.367
1995	1341.382
1996	1358.495
1997	1376.273
1998	1403.432
1999	1424.256
2000	1455.468
2001	1491.301
2002	1510.795
2003	1549.839
2004	1590.616
2005	1655.219
2006	1722.464
2007	1819.846
2008	1905.38
2009	1984.494
2010	2027.022
2011	2125.221
2012	2229.669
2013	2334.839
2014	2432.648
2015	2547.136
2016	2682.635
2017	2845.188
2018	3013.969
2019	3188.857
2020	3368.19
2021	3553.373
2022	3743.139