Year	2010 U.S. Dollars
1980-01-01	4357.69082846002
1981-01-01	4308.16571915663
1982-01-01	4201.23579766653
1983-01-01	4030.33365812577
1984-01-01	3912.04240561599
1985-01-01	3802.98221261479
1986-01-01	3833.09993815019
1987-01-01	3802.39644364857
1988-01-01	3666.32576121211
1989-01-01	3577.41762633941
1990-01-01	3509.35624248740
1991-01-01	3663.71454086257
1992-01-01	3802.63235655297
1993-01-01	3631.58073836806
1994-01-01	3586.94271056905
1995-01-01	3617.29003502938
1996-01-01	3620.88906120815
1997-01-01	3661.05152080502
1998-01-01	3673.84459937342
1999-01-01	3700.59111124980
2000-01-01	3746.71311947165
2001-01-01	3723.52529674691
2002-01-01	3845.05714966500
2003-01-01	3958.87386263969
2004-01-01	4394.41064649818
2005-01-01	4454.63476045359
2006-01-01	4715.10596554280
2007-01-01	4968.66403369319
2008-01-01	5036.25469879361
2009-01-01	4978.68000183449
2010-01-01	5191.58308141444
2011-01-01	5351.36974539229
2012-01-01	5502.25887327398
2013-01-01	5679.27865466084
2014-01-01	5901.24288434502
2015-01-01	6120.74540170818
2016-01-01	6028.99599945761
2017-01-01	5854.86161607748