Year	US Dollars adjusted for inflation)
1991	734.797
1992	738.408
1993	688.64
1994	659.261
1995	604.591
1996	555.09
1997	545.725
1998	570.495
1999	559.725
2000	547.379
2001	541.092
2002	545.095
2003	517.887
2004	521.861
2005	506.474
2006	514.524
2007	519.913
2008	527.282
2009	527.346
2010	529.833
2011	538.731
2012	546.93
2013	558.39
2014	570.41
2015	530.394
2016	510.221
2017	493.449
2018	478.387
2019	484.953
2020	493.847
2021	503.646
2022	515.924