Year	2010 U.S. Dollars
1980-01-01	511.050680495589
1981-01-01	513.481079603499
1982-01-01	508.353316652462
1983-01-01	505.445313355003
1984-01-01	503.850750543909
1985-01-01	499.440049827829
1986-01-01	503.518376533909
1987-01-01	510.281680122011
1988-01-01	509.305755706096
1989-01-01	506.799033061999
1990-01-01	493.745986252125
1991-01-01	488.336344527203
1992-01-01	477.172578163199
1993-01-01	462.348694048155
1994-01-01	454.626657211012
1995-01-01	468.121782590655
1996-01-01	483.262943868270
1997-01-01	494.028429962629
1998-01-01	500.933057588552
1999-01-01	508.808057380417
2000-01-01	517.549813778737
2001-01-01	531.384442003458
2002-01-01	544.657963081790
2003-01-01	560.871556550809
2004-01-01	583.944524702034
2005-01-01	619.450733158112
2006-01-01	655.627288734361
2007-01-01	700.930734280650
2008-01-01	735.727604880991
2009-01-01	753.307198491525
2010-01-01	779.383568243235
2011-01-01	792.951878108122
2012-01-01	817.685434514164
2013-01-01	845.404048569326
2014-01-01	870.270762643216
2015-01-01	881.940007808111
2016-01-01	892.547072034896
2017-01-01	917.885185867662