Year	Percent
1996-01-01	95.92270000000000
1997-01-01	95.61470000000000
1998-01-01	94.95270000000000
1999-01-01	89.07550000000000
2000-01-01	89.57850000000000
2001-01-01	88.40630000000000
2002-01-01	87.73770000000000
2003-01-01	88.23490000000000
2004-01-01	87.58570000000000
2005-01-01	87.47590000000000
2006-01-01	84.46870000000000
2007-01-01	83.08090000000000
2008-01-01	83.64740000000000
2009-01-01	85.19290000000000
2010-01-01	85.56510000000000
2011-01-01	84.91390000000000
2012-01-01	82.34100000000001
2013-01-01	82.30650000000000
2014-01-01	82.55520000000000
2015-01-01	82.22070000000000
2016-01-01	82.57940000000000