Year	Percent
1996-01-01	81.72020000000000
1997-01-01	79.52930000000000
1998-01-01	85.23310000000000
1999-01-01	86.62190000000000
2000-01-01	88.65030000000000
2001-01-01	81.06700000000000
2002-01-01	89.56210000000000
2003-01-01	78.21600000000001
2004-01-01	87.91700000000000
2005-01-01	85.36560000000000
2006-01-01	88.42940000000000
2007-01-01	85.26390000000000
2008-01-01	85.01220000000000
2009-01-01	84.46660000000000
2010-01-01	90.84630000000000
2011-01-01	91.84590000000000
2012-01-01	83.80430000000000
2013-01-01	87.46980000000000
2014-01-01	87.46980000000000
2015-01-01	70.37230000000000
2016-01-01	71.36930000000000