Year	Percent
1995-01-01	0
1996-01-01	0
1997-01-01	0
1998-01-01	0
1999-01-01	0
2000-01-01	0
2001-01-01	11
2002-01-01	11
2003-01-01	11
2004-01-01	11
2005-01-01	11
2006-01-01	10
2007-01-01	10
2008-01-01	11
2009-01-01	10
2010-01-01	13
2011-01-01	13
2012-01-01	13
2013-01-01	13