Year	US Dollars adjusted for inflation)
1991	990.018
1992	894.291
1993	876.286
1994	879.172
1995	868.417
1996	861.884
1997	847.795
1998	897.469
1999	853.776
2000	806.222
2001	831.876
2002	832.347
2003	850.994
2004	826.059
2005	838.095
2006	856.478
2007	849.445
2008	894.95
2009	852.556
2010	886.66
2011	870.897
2012	939.552
2013	952.594
2014	982.179
2015	979.265
2016	991.082
2017	1004.515
2018	1026.314
2019	1050.929
2020	1085.557
2021	1115.224
2022	1151.716