Year	Percent
1995-01-01	33
1996-01-01	33
1997-01-01	29
1998-01-01	36
1999-01-01	36
2000-01-01	36
2001-01-01	36
2002-01-01	31
2003-01-01	36
2004-01-01	40
2005-01-01	36
2006-01-01	40
2007-01-01	40
2008-01-01	40
2009-01-01	40
2010-01-01	36
2011-01-01	36
2012-01-01	36
2013-01-01	36