Year	Percent
2005-01-01	7.0
2006-01-01	6.5
2007-01-01	6.0
2008-01-01	6.1
2009-01-01	7.8
2010-01-01	8.2
2011-01-01	8.1
2012-01-01	8.2
2013-01-01	8.1
2014-01-01	7.7
2015-01-01	7.1
2016-01-01	6.6