Year	Percent
1995-01-01	55
1996-01-01	58
1997-01-01	67
1998-01-01	67
1999-01-01	67
2000-01-01	69
2001-01-01	64
2002-01-01	67
2003-01-01	73
2004-01-01	73
2005-01-01	71
2006-01-01	73
2007-01-01	69
2008-01-01	64
2009-01-01	64
2010-01-01	60
2011-01-01	60
2012-01-01	60
2013-01-01	60