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	6
2002-01-01	7
2003-01-01	13
2004-01-01	19
2005-01-01	19
2006-01-01	19
2007-01-01	19
2008-01-01	19
2009-01-01	19
2010-01-01	19
2011-01-01	13
2012-01-01	13
2013-01-01	13