Year	Percent
1995-01-01	41
1996-01-01	43
1997-01-01	43
1998-01-01	50
1999-01-01	54
2000-01-01	52
2001-01-01	54
2002-01-01	58
2003-01-01	58
2004-01-01	58
2005-01-01	58
2006-01-01	57
2007-01-01	57
2008-01-01	57
2009-01-01	55
2010-01-01	50
2011-01-01	55
2012-01-01	55
2013-01-01	55