Year	Percent
1995-01-01	67
1996-01-01	75
1997-01-01	75
1998-01-01	75
1999-01-01	75
2000-01-01	75
2001-01-01	67
2002-01-01	67
2003-01-01	67
2004-01-01	78
2005-01-01	78
2006-01-01	78
2007-01-01	78
2008-01-01	78
2009-01-01	78
2010-01-01	78
2011-01-01	78
2012-01-01	78
2013-01-01	78