Year	Percent
1995-01-01	78
1996-01-01	80
1997-01-01	80
1998-01-01	81
1999-01-01	78
2000-01-01	79
2001-01-01	82
2002-01-01	86
2003-01-01	86
2004-01-01	86
2005-01-01	86
2006-01-01	86
2007-01-01	86
2008-01-01	86
2009-01-01	86
2010-01-01	85
2011-01-01	84
2012-01-01	82
2013-01-01	85