Year	Percent
1995-01-01	17
1996-01-01	17
1997-01-01	17
1998-01-01	23
1999-01-01	29
2000-01-01	29
2001-01-01	36
2002-01-01	38
2003-01-01	38
2004-01-01	43
2005-01-01	50
2006-01-01	64
2007-01-01	64
2008-01-01	69
2009-01-01	75
2010-01-01	80
2011-01-01	80
2012-01-01	80
2013-01-01	80