Year	Percent
1995-01-01	67
1996-01-01	67
1997-01-01	68
1998-01-01	67
1999-01-01	70
2000-01-01	69
2001-01-01	70
2002-01-01	73
2003-01-01	74
2004-01-01	76
2005-01-01	76
2006-01-01	73
2007-01-01	71
2008-01-01	70
2009-01-01	72
2010-01-01	73
2011-01-01	73
2012-01-01	73
2013-01-01	73