Year	Percent
2005-01-01	6.9
2006-01-01	6.4
2007-01-01	5.8
2008-01-01	6.0
2009-01-01	7.7
2010-01-01	8.0
2011-01-01	7.9
2012-01-01	8.0
2013-01-01	7.9
2014-01-01	7.5
2015-01-01	6.9
2016-01-01	6.4