Year	Percent
1996-01-01	60.000000000000000
1997-01-01	60.000000000000000
1998-01-01	40.625000000000000
1999-01-01	50.980400000000000
2000-01-01	56.610200000000000
2001-01-01	56.521700000000000
2002-01-01	58.468100000000000
2003-01-01	57.327700000000000
2004-01-01	62.896800000000000
2005-01-01	57.668900000000000
2006-01-01	56.829100000000000
2007-01-01	58.892700000000000
2008-01-01	64.804300000000000
2009-01-01	66.707600000000000
2010-01-01	65.370300000000000
2011-01-01	59.861300000000000
2012-01-01	57.663000000000004
2013-01-01	54.803900000000000
2014-01-01	51.626300000000000