Year	US Dollars adjusted for inflation)
1991	60813.055
1992	61787.312
1993	62259.008
1994	64584.949
1995	66370.078
1996	68190.648
1997	71105.57
1998	72445.594
1999	74450.219
2000	77188.234
2001	78717.719
2002	79565.266
2003	79672.109
2004	81614.344
2005	84319.484
2006	87218.266
2007	90724.953
2008	91846.992
2009	86361.328
2010	87291.93
2011	81274.625
2012	69849.594
2013	66247.25
2014	66045.836
2015	66655.367
2016	67697.555
2017	69353.711
2018	71096.445
2019	72761.609
2020	74385.867
2021	76012.609
2022	77651.906