Year	Percent
1995-01-01	5.6
1996-01-01	5.7
1997-01-01	5.5
1998-01-01	5.4
1999-01-01	5.2
2000-01-01	4.8
2001-01-01	5.0
2002-01-01	5.5
2003-01-01	5.6
2004-01-01	5.4
2005-01-01	5.2
2006-01-01	4.8
2007-01-01	4.5
2008-01-01	4.9
2009-01-01	6.8
2010-01-01	7.0
2011-01-01	6.5
2012-01-01	6.2
2013-01-01	6.0
2014-01-01	5.4
2015-01-01	4.9
2016-01-01	4.7