Year	2010 U.S. Dollars
1986-01-01	563.527154378943
1987-01-01	565.715100389698
1988-01-01	582.627971128771
1989-01-01	583.296187919341
1990-01-01	581.276708491982
1991-01-01	565.285980578508
1992-01-01	550.565271566465
1993-01-01	545.686788961487
1994-01-01	538.694728295918
1995-01-01	540.113760055263
1996-01-01	546.077673233036
1997-01-01	560.221524198449
1998-01-01	569.348763768068
1999-01-01	580.775125075672
2000-01-01	584.851908391284
2001-01-01	595.260176908532
2002-01-01	614.616203001182
2003-01-01	610.759836288053
2004-01-01	613.171948944698
2005-01-01	619.185501756157
2006-01-01	613.705849402638
2007-01-01	641.626541369136
2008-01-01	653.513396178724
2009-01-01	631.923179035018
2010-01-01	647.803202894337
2011-01-01	669.217073445196
2012-01-01	693.339104782463
2013-01-01	704.683119278220
2014-01-01	714.163275381497
2015-01-01	723.870308781183
2016-01-01	779.911076147514
2017-01-01	822.925635177795