Year	Current U.S. Dollars
1994-01-01	318.020001219556
1995-01-01	485.617276668141
1996-01-01	736.975329355273
1997-01-01	978.516728019385
1998-01-01	1097.644554612030
1999-01-01	1246.497114100190
2000-01-01	1461.750520470290
2001-01-01	1524.412021523340
2002-01-01	1761.537647188610
2003-01-01	2214.732245918720
2004-01-01	2650.642660797930
2005-01-01	2968.411806119720
2006-01-01	3404.321697715670
2007-01-01	4180.292176258090
2008-01-01	5078.314577209140
2009-01-01	4701.334426413470
2010-01-01	4614.829041140500
2011-01-01	5054.325344237570
2012-01-01	4722.013403067270
2013-01-01	5042.582213046120
2014-01-01	5204.243718411690
2015-01-01	4584.242547817550
2016-01-01	4808.636042871120
2017-01-01	5180.636300934730