Year	Current U.S. Dollars
1970-01-01	279.324700939733
1971-01-01	293.678663693080
1972-01-01	358.483396677794
1973-01-01	591.572601406260
1974-01-01	1574.791731743530
1975-01-01	998.419710195089
1976-01-01	734.401941863524
1977-01-01	682.064063310723
1978-01-01	784.052345128949
1979-01-01	728.475121134018
1980-01-01	652.447033879644
1981-01-01	687.971663578508
1982-01-01	665.989266783779
1983-01-01	612.579941682390
1984-01-01	657.152244033346
1985-01-01	501.931915757358
1986-01-01	489.721320817580
1987-01-01	499.676458452160
1988-01-01	621.900882744431
1989-01-01	580.295253332133
1990-01-01	549.764385429195
1991-01-01	644.710845072179
1992-01-01	638.472566794407
1993-01-01	619.654573396411
1994-01-01	715.167114844734
1995-01-01	724.791305403500
1996-01-01	842.959139113718
1997-01-01	842.281248008607
1998-01-01	801.162980508090
1999-01-01	832.054794307501
2000-01-01	796.793763441361
2001-01-01	734.949246079786
2002-01-01	826.585504011134
2003-01-01	1015.038605096480
2004-01-01	1130.602806106350
2005-01-01	1214.556666704920
2006-01-01	1151.555617760670
2007-01-01	1357.632211342620
2008-01-01	1413.302339512670
2009-01-01	1297.285140570020
2010-01-01	1493.160510039480
2011-01-01	1692.613277033290
2012-01-01	1763.815497431520
2013-01-01	1724.361736594550
2014-01-01	1619.342181825030
2015-01-01	1504.715546529440
2016-01-01	1587.058145051110
2017-01-01	1685.166938539140