Year	Percent
1995-01-01	47
1996-01-01	53
1997-01-01	56
1998-01-01	60
1999-01-01	67
2000-01-01	67
2001-01-01	67
2002-01-01	71
2003-01-01	71
2004-01-01	71
2005-01-01	71
2006-01-01	79
2007-01-01	79
2008-01-01	76
2009-01-01	83
2010-01-01	83
2011-01-01	79
2012-01-01	83
2013-01-01	83