Year	Percent
1995-01-01	50
1996-01-01	40
1997-01-01	40
1998-01-01	40
1999-01-01	50
2000-01-01	50
2001-01-01	50
2002-01-01	50
2003-01-01	44
2004-01-01	44
2005-01-01	50
2006-01-01	50
2007-01-01	55
2008-01-01	55
2009-01-01	45
2010-01-01	46
2011-01-01	46
2012-01-01	46
2013-01-01	46