Year	Percent
2000-01-01	10.2
2001-01-01	9.9
2002-01-01	11
2003-01-01	11.1
2004-01-01	11.4
2005-01-01	13.7
2006-01-01	14.7
2007-01-01	14.8
2008-01-01	14.7
2009-01-01	15.1
2010-01-01	16.3
2011-01-01	15.9
2012-01-01	14.9
2013-01-01	13.7
2014-01-01	13.9
2015-01-01	13.2