Year	Percent
2006-01-01	5.9
2007-01-01	5.5
2008-01-01	6.0
2009-01-01	8.6
2010-01-01	8.7
2011-01-01	8.1
2012-01-01	8.1
2013-01-01	8.1
2014-01-01	7.5
2015-01-01	6.9
2016-01-01	6.4