Year	Percent
1995-01-01	3
1996-01-01	3
1997-01-01	3
1998-01-01	4
1999-01-01	5
2000-01-01	5
2001-01-01	5
2002-01-01	5
2003-01-01	5
2004-01-01	5
2005-01-01	5
2006-01-01	6
2007-01-01	10
2008-01-01	10
2009-01-01	10
2010-01-01	10
2011-01-01	11
2012-01-01	11
2013-01-01	12