Year	Percent
2000-01-01	12.9
2001-01-01	13
2002-01-01	11.8
2003-01-01	11.4
2004-01-01	11.1
2005-01-01	11.9
2006-01-01	12.9
2007-01-01	11.6
2008-01-01	11.8
2009-01-01	16
2010-01-01	17.7
2011-01-01	17.2
2012-01-01	16.8
2013-01-01	15.2
2014-01-01	12.3