Year	2010 U.S. Dollars
1990-01-01	5356.37243140753
1991-01-01	4705.12103036582
1992-01-01	4331.57020167018
1993-01-01	4403.78261459371
1994-01-01	4583.59557191729
1995-01-01	4920.72787703021
1996-01-01	5125.89835275819
1997-01-01	4893.09441700005
1998-01-01	4800.89005913164
1999-01-01	4789.12516893729
2000-01-01	4910.18087245182
2001-01-01	5257.61512467698
2002-01-01	5632.35085978001
2003-01-01	5986.52074578737
2004-01-01	6523.97656775663
2005-01-01	6838.24946883513
2006-01-01	7433.01195059568
2007-01-01	8061.40553238455
2008-01-01	8873.91518096511
2009-01-01	8419.28357376302
2010-01-01	8231.31277057833
2011-01-01	8439.80074768731
2012-01-01	8582.42302492229
2013-01-01	8918.57501928123
2014-01-01	9227.43745499623
2015-01-01	9639.38725500793
2016-01-01	10162.10734250470
2017-01-01	10932.32714550230