Year	US Dollars adjusted for inflation)
1991	5079.215
1992	4463.033
1993	4168.653
1994	4190.631
1995	4224.303
1996	4267.412
1997	4387.88
1998	4354.659
1999	4331.767
2000	4262.104
2001	4280.042
2002	4421.923
2003	4671.223
2004	4888.954
2005	5105.509
2006	5419.28
2007	6114.117
2008	6417.861
2009	6234.15
2010	6578.952
2011	7332.644
2012	8131.028
2013	8919.771
2014	9493.498
2015	9594.959
2016	10018.847
2017	10227.762
2018	10363.956
2019	10808.041
2020	11310.351
2021	11921.669
2022	12534.812