Year	Percent
1995-01-01	18
1996-01-01	25
1997-01-01	46
1998-01-01	46
1999-01-01	46
2000-01-01	54
2001-01-01	58
2002-01-01	58
2003-01-01	58
2004-01-01	58
2005-01-01	64
2006-01-01	82
2007-01-01	90
2008-01-01	90
2009-01-01	91
2010-01-01	90
2011-01-01	91
2012-01-01	91
2013-01-01	91