Year	Current U.S. Dollars
1980-01-01	401.215093166900
1981-01-01	359.791368136219
1982-01-01	327.545075646727
1983-01-01	331.808995114209
1984-01-01	311.144433038399
1985-01-01	322.203141173112
1986-01-01	444.246948530796
1987-01-01	521.522893802813
1988-01-01	534.784386157272
1989-01-01	497.290471921935
1990-01-01	607.469401290559
1991-01-01	582.306519200759
1992-01-01	609.903219566427
1993-01-01	586.653388456626
1994-01-01	401.840936409312
1995-01-01	487.797972971112
1996-01-01	471.721275014670
1997-01-01	422.548793806893
1998-01-01	417.928473023034
1999-01-01	420.877934215208
2000-01-01	375.852856584753
2001-01-01	395.931936301542
2002-01-01	433.269145081919
2003-01-01	544.506652602757
2004-01-01	616.419723606328
2005-01-01	621.903370202384
2006-01-01	648.300871676333
2007-01-01	720.759301258731
2008-01-01	795.970501862599
2009-01-01	778.545419864544
2010-01-01	769.174288260466
2011-01-01	829.758688479073
2012-01-01	788.632652955229
2013-01-01	834.341094890303
2014-01-01	852.954307862846
2015-01-01	727.646386827046
2016-01-01	775.080084631843
2017-01-01	797.286368474789