Year	US Dollars adjusted for inflation)
1991	1554.657
1992	1338.196
1993	1113.14
1994	1031.66
1995	1006.31
1996	969.513
1997	892.897
1998	858.793
1999	802.787
2000	727.971
2001	694.186
2002	695.003
2003	712.403
2004	737.471
2005	758.511
2006	774.837
2007	798.029
2008	821.019
2009	817.024
2010	847.05
2011	876.735
2012	909.575
2013	955.409
2014	1012.557
2015	1046.769
2016	1035.059
2017	1033.294
2018	1035.801
2019	1046.253
2020	1065.474
2021	1090.003
2022	1119.08