Year	Percent
1995-01-01	83
1996-01-01	83
1997-01-01	83
1998-01-01	83
1999-01-01	86
2000-01-01	86
2001-01-01	86
2002-01-01	86
2003-01-01	75
2004-01-01	75
2005-01-01	78
2006-01-01	78
2007-01-01	78
2008-01-01	78
2009-01-01	89
2010-01-01	89
2011-01-01	89
2012-01-01	89
2013-01-01	89