Year	Percent
1995-01-01	8
1996-01-01	8
1997-01-01	8
1998-01-01	11
1999-01-01	29
2000-01-01	43
2001-01-01	43
2002-01-01	43
2003-01-01	43
2004-01-01	57
2005-01-01	71
2006-01-01	75
2007-01-01	75
2008-01-01	75
2009-01-01	75
2010-01-01	75
2011-01-01	75
2012-01-01	75
2013-01-01	75