Year	Percent
2005-01-01	7.0
2006-01-01	6.4
2007-01-01	5.9
2008-01-01	6.1
2009-01-01	7.7
2010-01-01	8.1
2011-01-01	8.0
2012-01-01	8.1
2013-01-01	7.9
2014-01-01	7.5
2015-01-01	6.9
2016-01-01	6.4