Year	Percent
1995-01-01	65
1996-01-01	66
1997-01-01	71
1998-01-01	72
1999-01-01	76
2000-01-01	76
2001-01-01	81
2002-01-01	79
2003-01-01	84
2004-01-01	86
2005-01-01	86
2006-01-01	88
2007-01-01	87
2008-01-01	87
2009-01-01	82
2010-01-01	82
2011-01-01	81
2012-01-01	81
2013-01-01	80