Year	Percent
1995-01-01	43
1996-01-01	43
1997-01-01	50
1998-01-01	44
1999-01-01	44
2000-01-01	44
2001-01-01	44
2002-01-01	44
2003-01-01	44
2004-01-01	44
2005-01-01	56
2006-01-01	56
2007-01-01	56
2008-01-01	67
2009-01-01	67
2010-01-01	67
2011-01-01	75
2012-01-01	75
2013-01-01	75