Year	2010 U.S. Dollars
2002-01-01	364.570572951991
2003-01-01	376.758714204473
2004-01-01	364.095436021804
2005-01-01	389.416357791097
2006-01-01	397.985904741902
2007-01-01	440.368155343632
2008-01-01	444.950137932355
2009-01-01	524.823533211573
2010-01-01	553.300289383064
2011-01-01	569.233387721432
2012-01-01	630.427412567377
2013-01-01	633.658411271767
2014-01-01	630.320014012209
2015-01-01	620.056524980920
2016-01-01	617.889972323552
2017-01-01	618.332789965442