Year	2010 U.S. Dollars
1989-01-01	9867.37090949587
1990-01-01	9534.49562145996
1991-01-01	9033.07192326919
1992-01-01	7717.09454344013
1993-01-01	7056.15511958363
1994-01-01	6176.86609952928
1995-01-01	5919.34063407522
1996-01-01	5714.55123720316
1997-01-01	5804.14240311293
1998-01-01	5505.62779004877
1999-01-01	5876.14516013283
2000-01-01	6491.00135927102
2001-01-01	6850.51712899489
2002-01-01	7208.57072219707
2003-01-01	7769.67022522781
2004-01-01	8360.81191962973
2005-01-01	8927.90565842376
2006-01-01	9687.49351320027
2007-01-01	10532.32627061790
2008-01-01	11089.92995465530
2009-01-01	10219.52130640540
2010-01-01	10674.98770736500
2011-01-01	11230.38915294930
2012-01-01	11621.38568141480
2013-01-01	11803.70895637610
2014-01-01	11680.59354487700
2015-01-01	11325.78768757280
2016-01-01	11279.62534104610
2017-01-01	11441.00345699580