Year	Percent
1991-01-01	104.26799999999999
1992-01-01	98.35160000000000
1993-01-01	83.11200000000001
1994-01-01	73.77110000000000
1995-01-01	76.26740000000000
1996-01-01	77.75900000000000
1997-01-01	72.60610000000000
1998-01-01	72.31440000000000
1999-01-01	78.38780000000000
2000-01-01	80.83940000000000
2001-01-01	75.90500000000000
2002-01-01	72.80620000000000
2003-01-01	76.47860000000000
2004-01-01	85.35750000000000
2005-01-01	103.61900000000000
2006-01-01	117.62100000000001
2007-01-01	135.59600000000000
2008-01-01	153.11600000000000
2009-01-01	162.40400000000000
2010-01-01	164.51600000000000
2011-01-01	160.41800000000000
2012-01-01	154.03000000000000
2013-01-01	138.68200000000002
2014-01-01	113.37500000000000
2015-01-01	96.13799999999999
2016-01-01	86.60740000000000