Year	Percent
1995-01-01	27
1996-01-01	27
1997-01-01	29
1998-01-01	42
1999-01-01	45
2000-01-01	45
2001-01-01	45
2002-01-01	45
2003-01-01	45
2004-01-01	45
2005-01-01	45
2006-01-01	40
2007-01-01	40
2008-01-01	40
2009-01-01	40
2010-01-01	30
2011-01-01	30
2012-01-01	30
2013-01-01	30