Year	Percent
1995-01-01	52
1996-01-01	55
1997-01-01	52
1998-01-01	59
1999-01-01	62
2000-01-01	60
2001-01-01	63
2002-01-01	65
2003-01-01	62
2004-01-01	62
2005-01-01	62
2006-01-01	62
2007-01-01	62
2008-01-01	62
2009-01-01	58
2010-01-01	58
2011-01-01	64
2012-01-01	64
2013-01-01	64