Year	2010 U.S. Dollars
1990-01-01	5890.27604343000
1991-01-01	5209.68159952491
1992-01-01	4936.99125133040
1993-01-01	4512.62020400203
1994-01-01	4001.66928058981
1995-01-01	3738.46947329972
1996-01-01	3814.49932695407
1997-01-01	3941.12484786578
1998-01-01	3933.55776763006
1999-01-01	4078.42679261378
2000-01-01	4491.59182333064
2001-01-01	5106.63416701035
2002-01-01	5606.85299741729
2003-01-01	6107.70925930304
2004-01-01	6647.69212950055
2005-01-01	7227.98294898919
2006-01-01	7917.19534235689
2007-01-01	8523.76620458622
2008-01-01	8698.42365362226
2009-01-01	8573.70829393744
2010-01-01	9070.48825285747
2011-01-01	9603.24465530261
2012-01-01	9923.42220831249
2013-01-01	10368.49929947910
2014-01-01	10646.03446478610
2015-01-01	10617.47465496680
2016-01-01	10582.70087176500
2017-01-01	10857.37727719410