Year	Percent
1995-01-01	13
1996-01-01	13
1997-01-01	13
1998-01-01	22
1999-01-01	20
2000-01-01	38
2001-01-01	38
2002-01-01	44
2003-01-01	50
2004-01-01	50
2005-01-01	53
2006-01-01	53
2007-01-01	60
2008-01-01	60
2009-01-01	60
2010-01-01	60
2011-01-01	60
2012-01-01	60
2013-01-01	60