Year	US Dollars adjusted for inflation)
1991	3183.045
1992	3427.333
1993	3612.552
1994	4167.151
1995	4611.646
1996	4984.995
1997	5389.202
1998	5904.109
1999	6395.894
2000	7109.67
2001	7046.164
2002	7195.593
2003	7288.002
2004	7805.898
2005	8130.899
2006	8553.056
2007	9601.664
2008	9976.9
2009	9580.49
2010	9486.783
2011	9646.528
2012	9509.268
2013	9354.389
2014	9189.411
2015	9074.83
2016	9223.113
2017	9399.923
2018	9625.819
2019	9878.078
2020	10141.841
2021	10402.459
2022	10675.191