Year	2010 U.S. Dollars
1966-01-01	422.353636326845
1967-01-01	414.076767432048
1968-01-01	443.950142152578
1969-01-01	444.026945894958
1970-01-01	459.246611669142
1971-01-01	446.070135577124
1972-01-01	433.631310901853
1973-01-01	458.925758041985
1974-01-01	470.861100709048
1975-01-01	513.415687745695
1976-01-01	535.397274704189
1977-01-01	538.348947450942
1978-01-01	556.211926771259
1979-01-01	532.574190509502
1980-01-01	547.975758706108
1981-01-01	547.129799961141
1982-01-01	523.849892535355
1983-01-01	559.267811371133
1984-01-01	556.024934551090
1985-01-01	528.161393833329
1986-01-01	525.031765468620
1987-01-01	512.808160000037
1988-01-01	511.028513737770
1989-01-01	517.765310411161
1990-01-01	515.330478440116
1991-01-01	513.051275939594
1992-01-01	514.022905550303
1993-01-01	514.466447854607
1994-01-01	501.111615158668
1995-01-01	491.594016852015
1996-01-01	488.556239236962
1997-01-01	498.203641848062
1998-01-01	501.083534361185
1999-01-01	517.776709266947
2000-01-01	530.102407227188
2001-01-01	543.786219160641
2002-01-01	509.722542231702
2003-01-01	527.505574199683
2004-01-01	546.776033406420
2005-01-01	524.513949077243
2006-01-01	513.755511404261
2007-01-01	515.773110969305
2008-01-01	528.372791498616
2009-01-01	544.959790809939
2010-01-01	562.483781687741
2011-01-01	521.612703725505
2012-01-01	533.778044301130
2013-01-01	542.133088782248
2014-01-01	530.318853371274
2015-01-01	536.414127007992
2016-01-01	531.919405879094
2017-01-01	534.269483616798