Year	US Dollars adjusted for inflation)
1991	789.747
1992	866.148
1993	827.077
1994	420.543
1995	566.924
1996	618.586
1997	663.196
1998	672.995
1999	658.402
2000	678.454
2001	707.44
2002	777.034
2003	776.114
2004	816.713
2005	873.955
2006	931.157
2007	977.544
2008	1059.787
2009	1097.559
2010	1147.905
2011	1207.397
2012	1281.714
2013	1289.521
2014	1334.194
2015	1413.29
2016	1456.011
2017	1509.987
2018	1575.78
2019	1648.54
2020	1727.838
2021	1812.674
2022	1900.719