Year Current U.S. Dollars 1995-01-01 2196.618466519010 1996-01-01 2749.966439083420 1997-01-01 3178.831484332870 1998-01-01 2416.069077431180 1999-01-01 2441.430389044210 2000-01-01 870.136525159338 2001-01-01 1634.875060689450 2002-01-01 2149.909404185110 2003-01-01 2832.490652308460 2004-01-01 3331.228765606020 2005-01-01 3528.131007757920 2006-01-01 4129.758741028290 2007-01-01 5458.121718421690 2008-01-01 6701.773912780130 2009-01-01 5821.305397056840 2010-01-01 5411.877403919110 2011-01-01 6423.291783345830 2012-01-01 5659.380204036910 2013-01-01 6353.826382793320 2014-01-01 6200.173221024740 2015-01-01 5237.255334231360 2016-01-01 5426.198278872470 2017-01-01 5900.038107512600