Year	Percent
1995-01-01	41
1996-01-01	41
1997-01-01	42
1998-01-01	40
1999-01-01	45
2000-01-01	45
2001-01-01	42
2002-01-01	42
2003-01-01	42
2004-01-01	38
2005-01-01	39
2006-01-01	39
2007-01-01	45
2008-01-01	45
2009-01-01	43
2010-01-01	43
2011-01-01	41
2012-01-01	41
2013-01-01	41