Year	2010 U.S. Dollars
1989-01-01	6438.91063993094
1990-01-01	6306.03020514003
1991-01-01	5945.47113147296
1992-01-01	5303.32339965082
1993-01-01	4996.33718952300
1994-01-01	4466.59877735980
1995-01-01	4406.88278352449
1996-01-01	4404.49154536742
1997-01-01	4518.25682520148
1998-01-01	4436.83137521220
1999-01-01	4530.17237677744
2000-01-01	4891.32024744840
2001-01-01	5022.30978389269
2002-01-01	5301.55030188518
2003-01-01	5661.52853367457
2004-01-01	6124.70767905827
2005-01-01	6554.78687612716
2006-01-01	7078.04516749840
2007-01-01	7609.25492360091
2008-01-01	7920.19770680130
2009-01-01	7412.79574147425
2010-01-01	7756.54777848545
2011-01-01	8220.01069073190
2012-01-01	8472.65290876146
2013-01-01	8760.66992186927
2014-01-01	8901.82155712894
2015-01-01	8897.77523166453
2016-01-01	8977.83981005957
2017-01-01	9284.08929183490