Year	US Dollars adjusted for inflation)
1991	8779.648
1992	9200.212
1993	9107.978
1994	9103.43
1995	9038.857
1996	9399.173
1997	9656.053
1998	9947.597
1999	10385.076
2000	10666.098
2001	10842.552
2002	10867.77
2003	11130.359
2004	11640.239
2005	11710.33
2006	11974.848
2007	12448.679
2008	12716.835
2009	13179.321
2010	13310.017
2011	13645.245
2012	13715.692
2013	13726.947
2014	13884.773
2015	13963.911
2016	14098.762
2017	14244.583
2018	14423.884
2019	14649.581
2020	14917.169
2021	15307.8
2022	15798.329