Year	Percent
1995-01-01	19
1996-01-01	21
1997-01-01	32
1998-01-01	35
1999-01-01	42
2000-01-01	53
2001-01-01	53
2002-01-01	59
2003-01-01	67
2004-01-01	67
2005-01-01	70
2006-01-01	81
2007-01-01	81
2008-01-01	81
2009-01-01	79
2010-01-01	79
2011-01-01	79
2012-01-01	82
2013-01-01	82