Year	Percent
2005-01-01	5.8
2006-01-01	5.3
2007-01-01	4.9
2008-01-01	5.2
2009-01-01	7.3
2010-01-01	7.5
2011-01-01	7.1
2012-01-01	7.2
2013-01-01	7.2
2014-01-01	6.8
2015-01-01	6.2
2016-01-01	5.8