Year	US Dollars adjusted for inflation)
1991	10824.081
1992	10615.689
1993	10411.789
1994	10387.894
1995	10616.809
1996	11491.155
1997	12030.896
1998	12284.784
1999	12347.793
2000	11093.743
2001	11278.587
2002	10615.675
2003	10592.791
2004	11260.855
2005	11488.449
2006	10609.055
2007	10387.762
2008	11083.039
2009	11673.979
2010	12206.109
2011	12265.979
2012	12719.814
2013	12608.634
2014	12437.313
2015	11953.084
2016	12184.682
2017	12232.192
2018	12114.734
2019	12081.493
2020	12079.507
2021	12086.167
2022	12117.801