Year	Percent
1995-01-01	36
1996-01-01	31
1997-01-01	31
1998-01-01	25
1999-01-01	25
2000-01-01	25
2001-01-01	22
2002-01-01	15
2003-01-01	15
2004-01-01	14
2005-01-01	14
2006-01-01	14
2007-01-01	12
2008-01-01	12
2009-01-01	12
2010-01-01	10
2011-01-01	10
2012-01-01	10
2013-01-01	10