Year	Current U.S. Dollars
1970-01-01	110.607766832651
1971-01-01	108.143763545151
1972-01-01	118.279179173238
1973-01-01	118.176121658824
1974-01-01	128.455648905147
1975-01-01	139.999923125405
1976-01-01	143.321595455084
1977-01-01	146.133616359605
1978-01-01	155.570877164250
1979-01-01	149.581778221597
1980-01-01	138.169792150260
1981-01-01	189.970091966023
1982-01-01	198.787073003547
1983-01-01	191.517443624338
1984-01-01	157.923554070668
1985-01-01	159.927530605305
1986-01-01	141.299202443454
1987-01-01	184.223431763817
1988-01-01	170.291983070195
1989-01-01	215.618314696027
1990-01-01	241.002484994058
1991-01-01	247.938229165083
1992-01-01	212.940763783483
1993-01-01	217.607539491192
1994-01-01	211.595301386233
1995-01-01	223.341842193008
1996-01-01	233.309560694103
1997-01-01	227.638257172378
1998-01-01	172.060141341431
1999-01-01	183.853020084099
2000-01-01	297.751933595220
2001-01-01	309.486749001111
2002-01-01	321.481320392982
2003-01-01	360.571858534299
2004-01-01	393.313824367448
2005-01-01	424.956204432526
2006-01-01	418.951269310121
2007-01-01	481.335009991043
2008-01-01	583.894418973508
2009-01-01	544.861280100724
2010-01-01	546.721668646992
2011-01-01	688.771819686925
2012-01-01	604.268355195888
2013-01-01	621.940673580097
2014-01-01	610.468490262120
2015-01-01	591.806149672952
2016-01-01	648.898936629656
2017-01-01	723.658621625927