Year	2010 U.S. Dollars
1988-01-01	5885.18811860861
1989-01-01	3376.71179283224
1990-01-01	4230.91224414035
1991-01-01	5742.11086597224
1992-01-01	5852.92774145123
1993-01-01	6091.98162678945
1994-01-01	6416.32652455242
1995-01-01	6703.23022563793
1996-01-01	6961.33174391701
1997-01-01	6754.39114268882
1998-01-01	6949.23388621219
1999-01-01	6824.18315800386
2000-01-01	6747.63317967161
2001-01-01	6749.15226467587
2002-01-01	6656.74170105283
2003-01-01	6539.65727036371
2004-01-01	6636.30314976965
2005-01-01	6606.29200014322
2006-01-01	6592.54407984392
2007-01-01	7157.55078134418
2008-01-01	7859.94420316084
2009-01-01	8501.10851566555
2010-01-01	8858.28397743868
2011-01-01	8450.10746664779
2012-01-01	8107.44417343230
2013-01-01	7753.87964552098
2014-01-01	7447.36434395053
2015-01-01	7189.63371109902
2016-01-01	7143.95909540687
2017-01-01	7197.63042059815