Year	Percent
1995-01-01	67
1996-01-01	70
1997-01-01	64
1998-01-01	64
1999-01-01	64
2000-01-01	64
2001-01-01	75
2002-01-01	75
2003-01-01	69
2004-01-01	69
2005-01-01	69
2006-01-01	71
2007-01-01	71
2008-01-01	73
2009-01-01	71
2010-01-01	71
2011-01-01	71
2012-01-01	71
2013-01-01	71