Year	2010 U.S. Dollars
1985-01-01	1374.255828369670
1986-01-01	1376.990866049390
1987-01-01	1316.465365603360
1988-01-01	1452.333986180370
1989-01-01	1318.723967114520
1990-01-01	1277.586896070860
1991-01-01	1161.169019261510
1992-01-01	809.109579377170
1993-01-01	665.395604332221
1994-01-01	515.763367876142
1995-01-01	445.156247090078
1996-01-01	365.437726504682
1997-01-01	366.342959955360
1998-01-01	380.159579549102
1999-01-01	388.217219657996
2000-01-01	413.586440748804
2001-01-01	447.782178202458
2002-01-01	486.865459975268
2003-01-01	529.805212637564
2004-01-01	572.539039721910
2005-01-01	598.302229768552
2006-01-01	626.797221507883
2007-01-01	661.344188040371
2008-01-01	698.230224101993
2009-01-01	708.945345117649
2010-01-01	738.347522660006
2011-01-01	775.299296304604
2012-01-01	814.775068819447
2013-01-01	855.513541651874
2014-01-01	892.640045801739
2015-01-01	925.621638386918
2016-01-01	968.385602564592
2017-01-01	1015.472188803600