Year	US Dollars adjusted for inflation)
1991	6855.389
1992	6803.423
1993	6624.199
1994	7042.488
1995	6900.236
1996	6897.966
1997	7098.231
1998	7259.126
1999	7115.505
2000	7383.634
2001	6884.562
2002	6290.719
2003	6358.606
2004	6404.481
2005	6549.979
2006	6888.775
2007	7030.786
2008	7290.007
2009	7316.562
2010	7210.502
2011	7106.817
2012	7020.959
2013	6943.421
2014	6902.86
2015	6652.395
2016	6735.076
2017	6874.272
2018	7012.747
2019	7106.458
2020	7206.298
2021	7305.886
2022	7426.604