Year	US Dollars adjusted for inflation)
1991	862.485
1992	866.264
1993	913.57
1994	945.934
1995	1025.996
1996	1092.656
1997	1119.839
1998	1144.31
1999	1202.882
2000	1204.739
2001	1230.499
2002	1296.712
2003	1329.336
2004	1360.658
2005	1385.38
2006	1488.375
2007	1563.53
2008	1645.824
2009	1699.815
2010	1724.692
2011	1813.103
2012	1805.155
2013	1772.301
2014	1798.363
2015	1820.702
2016	1837.977
2017	1890.379
2018	1937.822
2019	1997.644
2020	2060.823
2021	2129.058
2022	2180.378