Year	Percent
1996-01-01	90.38130000000000
1997-01-01	91.89490000000000
1998-01-01	91.66580000000000
1999-01-01	92.69350000000000
2000-01-01	93.29230000000000
2001-01-01	92.23140000000000
2002-01-01	91.28030000000000
2003-01-01	90.46110000000000
2004-01-01	87.05630000000000
2005-01-01	86.10130000000000
2006-01-01	83.42299999999999
2007-01-01	84.08270000000000
2008-01-01	81.70700000000000
2009-01-01	75.49580000000000
2010-01-01	78.21550000000000
2011-01-01	78.69440000000000
2012-01-01	81.26899999999999
2013-01-01	79.87310000000000
2014-01-01	78.30390000000000
2015-01-01	76.69550000000000
2016-01-01	72.27670000000000