Year	US Dollars adjusted for inflation)
1991	3940.101
1992	2725.84
1993	2242.976
1994	1745.201
1995	1502.774
1996	1262.449
1997	1266.104
1998	1303.354
1999	1324.916
2000	1390.978
2001	1483.944
2002	1593.448
2003	1706.064
2004	1816.596
2005	1868.408
2006	1930.776
2007	2012.919
2008	2103.905
2009	2126.358
2010	2201.633
2011	2292.726
2012	2392.948
2013	2500.777
2014	2602.473
2015	2694.347
2016	2826.714
2017	2913.835
2018	3012.809
2019	3125.914
2020	3250.696
2021	3389.805
2022	3539.965