Year	Percent
1995-01-01	45
1996-01-01	46
1997-01-01	40
1998-01-01	40
1999-01-01	40
2000-01-01	40
2001-01-01	43
2002-01-01	40
2003-01-01	47
2004-01-01	53
2005-01-01	58
2006-01-01	52
2007-01-01	48
2008-01-01	48
2009-01-01	50
2010-01-01	55
2011-01-01	62
2012-01-01	63
2013-01-01	63