Year	Percent
1995-01-01	5
1996-01-01	5
1997-01-01	0
1998-01-01	6
1999-01-01	18
2000-01-01	18
2001-01-01	18
2002-01-01	17
2003-01-01	17
2004-01-01	17
2005-01-01	15
2006-01-01	15
2007-01-01	14
2008-01-01	19
2009-01-01	19
2010-01-01	24
2011-01-01	25
2012-01-01	25
2013-01-01	25