Year	Percent
1995-01-01	85.9503747300000
1996-01-01	85.1690906675000
1997-01-01	84.7456340025000
1998-01-01	84.4824100825000
1999-01-01	84.0101790275000
2000-01-01	84.0211318025000
2001-01-01	83.4829533700000
2002-01-01	83.1267170750000
2003-01-01	83.2266956150000
2004-01-01	83.1773533150000
2005-01-01	82.6937639400000
2006-01-01	82.9715340525000
2007-01-01	83.7245049625000
2008-01-01	83.9359194575000
2009-01-01	83.3226628775000
2010-01-01	83.7361252950000
2011-01-01	83.7625920661656
2012-01-01	86.8666666666666
2013-01-01	86.5083333333334
2014-01-01	86.8166666666666
2015-01-01	87.2833333333333
2016-01-01	86.9250000000000
2017-01-01	86.9666666666666