Year	Percent
2005-01-01	6.4
2006-01-01	5.9
2007-01-01	5.4
2008-01-01	5.9
2009-01-01	8.4
2010-01-01	8.6
2011-01-01	8.0
2012-01-01	7.9
2013-01-01	7.9
2014-01-01	7.3
2015-01-01	6.7
2016-01-01	6.2