Year	US Dollars adjusted for inflation)
1991	7862.615
1992	7487.333
1993	7464.562
1994	7976.269
1995	8137.567
1996	8012.116
1997	8088.364
1998	7875.917
1999	7690.835
2000	7914.597
2001	7479.307
2002	7567.14
2003	7512.261
2004	7610.132
2005	7800.711
2006	8054.671
2007	8445.369
2008	9016.386
2009	8879.761
2010	9315.531
2011	9783.06
2012	10181.247
2013	10681.4
2014	10826.595
2015	11157.188
2016	11439.162
2017	11538.307
2018	11747.285
2019	12000.146
2020	12269.065
2021	12561.517
2022	12863.567