Year	Percent
1995-01-01	22
1996-01-01	28
1997-01-01	31
1998-01-01	38
1999-01-01	48
2000-01-01	46
2001-01-01	50
2002-01-01	55
2003-01-01	62
2004-01-01	62
2005-01-01	69
2006-01-01	69
2007-01-01	69
2008-01-01	69
2009-01-01	69
2010-01-01	69
2011-01-01	65
2012-01-01	65
2013-01-01	65