Year	2010 U.S. Dollars
1990-01-01	3118.54658676172
1991-01-01	3049.01599483444
1992-01-01	2324.45297663240
1993-01-01	1760.55465085842
1994-01-01	1394.74420894615
1995-01-01	1216.07791710291
1996-01-01	1219.50934895182
1997-01-01	1277.85412406008
1998-01-01	1392.36119355104
1999-01-01	1482.32977280697
2000-01-01	1633.39443541310
2001-01-01	1781.24639507096
2002-01-01	1955.41315045621
2003-01-01	2158.00717069154
2004-01-01	2357.39602637373
2005-01-01	2949.44281843844
2006-01-01	3923.65815354896
2007-01-01	4851.17690871859
2008-01-01	5262.10135550006
2009-01-01	5639.00168940500
2010-01-01	5842.80578358576
2011-01-01	5770.96970270605
2012-01-01	5820.07984747120
2013-01-01	6078.32064851423
2014-01-01	6122.98048925179
2015-01-01	6117.03086236702
2016-01-01	5861.51196206606
2017-01-01	5805.13453500275