Year	Percent
1996-01-01	51.101200000000000
1997-01-01	51.150000000000000
1998-01-01	49.797200000000000
1999-01-01	49.537300000000000
2000-01-01	49.274800000000000
2001-01-01	48.653200000000000
2002-01-01	51.787600000000000
2003-01-01	57.669200000000000
2004-01-01	58.035600000000000
2005-01-01	58.401600000000000
2006-01-01	65.577100000000000
2007-01-01	61.811900000000000
2008-01-01	62.538000000000004
2009-01-01	77.199400000000000
2010-01-01	76.261500000000000
2011-01-01	75.945200000000000
2012-01-01	76.619900000000000
2013-01-01	77.450400000000000
2014-01-01	79.501000000000000
2015-01-01	83.441800000000000
2016-01-01	84.985500000000000