Year	Percent
1995-01-01	50
1996-01-01	50
1997-01-01	50
1998-01-01	50
1999-01-01	60
2000-01-01	60
2001-01-01	64
2002-01-01	64
2003-01-01	64
2004-01-01	64
2005-01-01	64
2006-01-01	77
2007-01-01	85
2008-01-01	83
2009-01-01	83
2010-01-01	83
2011-01-01	83
2012-01-01	83
2013-01-01	83