Year	Percent
1990-01-01	156.02200000000002
1991-01-01	142.79500000000000
1992-01-01	127.70700000000001
1993-01-01	128.60700000000000
1994-01-01	139.12300000000000
1995-01-01	150.62300000000000
1996-01-01	152.92200000000000
1997-01-01	164.34799999999998
1998-01-01	185.64200000000000
1999-01-01	173.51600000000000
2000-01-01	161.75400000000000
2001-01-01	167.63600000000000
2002-01-01	166.40700000000000
2003-01-01	165.33500000000000
2004-01-01	160.46100000000000
2005-01-01	157.48800000000000
2006-01-01	152.80300000000000
2007-01-01	144.26800000000000
2008-01-01	150.59100000000000
2009-01-01	174.90599999999998
2010-01-01	203.49000000000000
2011-01-01	226.00799999999998
2012-01-01	231.98100000000000
2013-01-01	241.62400000000002
2014-01-01	257.22400000000000
2015-01-01	249.13299999999998
2016-01-01	242.18900000000002