Year	Percent
1983-01-01	250.91700000000000
1984-01-01	276.69400000000000
1985-01-01	378.87300000000005
1986-01-01	497.56600000000000
1987-01-01	489.66700000000000
1988-01-01	391.44500000000000
1989-01-01	370.01000000000000
1990-01-01	382.41300000000000
1991-01-01	300.67200000000000
1992-01-01	287.46000000000000
1993-01-01	286.92300000000000
1994-01-01	263.30800000000000
1995-01-01	243.84400000000002
1996-01-01	222.91000000000000
1997-01-01	230.90700000000000
1998-01-01	190.52000000000000
1999-01-01	162.67300000000000
2000-01-01	134.77800000000000
2001-01-01	141.30000000000000
2002-01-01	130.08700000000002
2003-01-01	131.79399999999998
2004-01-01	128.32600000000000
2005-01-01	123.43600000000000
2006-01-01	131.53200000000000
2007-01-01	139.40100000000000
2008-01-01	126.81200000000001
2009-01-01	134.24700000000000
2010-01-01	136.41299999999998
2011-01-01	127.20299999999999
2012-01-01	134.87900000000000
2013-01-01	147.74600000000000
2014-01-01	139.55700000000002
2015-01-01	133.32200000000000
2016-01-01	143.19600000000000