Year	Percent
1995-01-01	6
1996-01-01	6
1997-01-01	9
1998-01-01	13
1999-01-01	16
2000-01-01	16
2001-01-01	19
2002-01-01	19
2003-01-01	19
2004-01-01	19
2005-01-01	21
2006-01-01	44
2007-01-01	52
2008-01-01	54
2009-01-01	54
2010-01-01	54
2011-01-01	54
2012-01-01	54
2013-01-01	54