Year	US Dollars adjusted for inflation)
1991	1006.985
1992	989.017
1993	978.781
1994	946.96
1995	932.843
1996	924.063
1997	928.732
1998	934.906
1999	947.496
2000	960.775
2001	982.922
2002	827.74
2003	876.366
2004	883.057
2005	884.41
2006	895.876
2007	918.81
2008	950.752
2009	880.713
2010	853.398
2011	826.606
2012	813.388
2013	810.858
2014	817.788
2015	826.657
2016	835.452
2017	848.934
2018	866.568
2019	887.918
2020	902.932
2021	917.195
2022	933.218