Year Current U.S. Dollars 1995-01-01 2168.79609901209 1996-01-01 2328.15380783134 1997-01-01 2830.73753338088 1998-01-01 3166.89564814117 1999-01-01 3113.54642795619 2000-01-01 3297.35470084107 2001-01-01 3530.14733731891 2002-01-01 4146.98792783931 2003-01-01 5505.53566883110 2004-01-01 6706.96699843928 2005-01-01 7863.16200865166 2006-01-01 9240.64254797441 2007-01-01 12297.91534803960 2008-01-01 14961.56817591870 2009-01-01 11837.39102710860 2010-01-01 11984.86856988230 2011-01-01 14357.73522894710 2012-01-01 14341.18162799320 2013-01-01 15693.78672825990 2014-01-01 16545.12266739960 2015-01-01 14289.12056923550 2016-01-01 14912.68654279320 2017-01-01 16680.67809523390