Year	US Dollars adjusted for inflation)
1986	563.52715
1987	565.7151
1988	582.62797
1989	583.29619
1990	581.27671
1991	565.28598
1992	550.56527
1993	545.68679
1994	538.69473
1995	540.11376
1996	546.07767
1997	560.22152
1998	569.34876
1999	580.77513
2000	584.85191
2001	595.26018
2002	614.6162
2003	610.75984
2004	613.17195
2005	619.1855
2006	613.70585
2007	641.62654
2008	653.5134
2009	631.92318
2010	647.8032
2011	669.21707
2012	693.3391
2013	704.68312
2014	714.16328
2015	723.87031
2016	779.91108
2017	822.92564