Year	Percent
1995-01-01	39
1996-01-01	42
1997-01-01	40
1998-01-01	40
1999-01-01	41
2000-01-01	50
2001-01-01	61
2002-01-01	78
2003-01-01	83
2004-01-01	83
2005-01-01	83
2006-01-01	82
2007-01-01	75
2008-01-01	75
2009-01-01	73
2010-01-01	73
2011-01-01	67
2012-01-01	67
2013-01-01	67