Year	US Dollars adjusted for inflation)
1991	8852.11507
1992	8584.22922
1993	8544.51298
1994	8808.38192
1995	8952.03937
1996	8968.69897
1997	9286.95876
1998	9702.89057
1999	10040.51221
2000	10490.35032
2001	10918.24881
2002	11445.19358
2003	11919.76889
2004	12544.09037
2005	13120.62026
2006	13647.15237
2007	13727.73483
2008	13869.44117
2009	12974.14418
2010	13092.23376
2011	13347.58402
2012	13196.15334
2013	13509.92425
2014	14119.07042
2015	14629.23503
2016	14997.20052
2017	15647.84603