Year	US Dollars adjusted for inflation)
1991	8218.89
1992	8481.206
1993	8666.117
1994	9034.197
1995	9416.477
1996	9937.82
1997	10624.775
1998	11302.512
1999	11740.602
2000	11901.387
2001	12777.745
2002	12361.442
2003	12949.494
2004	13519.162
2005	11520.443
2006	12698.553
2007	13462.729
2008	14527.353
2009	13318.652
2010	13587.329
2011	14192.755
2012	14075.587
2013	14151.641
2014	14501.898
2015	14680.897
2016	15116.35
2017	15358.013
2018	15657.721
2019	16030.368
2020	16441.52
2021	16889.598
2022	17236.857