Year	US Dollars adjusted for inflation)
1991	7141.909
1992	6670.227
1993	6427.264
1994	7306.08
1995	6972.957
1996	7288.093
1997	6861.731
1998	7414.777
1999	6864.719
2000	6808.905
2001	7085.264
2002	7137.36
2003	7388.604
2004	7487.622
2005	7641.958
2006	8018.103
2007	8165.75
2008	8541.62
2009	8699.288
2010	8872.436
2011	9165.27
2012	9413.434
2013	9696.175
2014	9835.644
2015	10142.332
2016	10062.754
2017	10439.356
2018	10651.268
2019	10962.666
2020	11309.861
2021	11682.579
2022	12058.158