Year	Percent
1995-01-01	29
1996-01-01	37
1997-01-01	43
1998-01-01	51
1999-01-01	59
2000-01-01	60
2001-01-01	67
2002-01-01	70
2003-01-01	71
2004-01-01	71
2005-01-01	77
2006-01-01	76
2007-01-01	75
2008-01-01	76
2009-01-01	77
2010-01-01	74
2011-01-01	75
2012-01-01	77
2013-01-01	76