Year	Percent
1995-01-01	55
1996-01-01	57
1997-01-01	57
1998-01-01	57
1999-01-01	57
2000-01-01	57
2001-01-01	60
2002-01-01	62
2003-01-01	62
2004-01-01	58
2005-01-01	60
2006-01-01	60
2007-01-01	60
2008-01-01	60
2009-01-01	60
2010-01-01	56
2011-01-01	59
2012-01-01	59
2013-01-01	63