Year	Percent
1998-01-01	11.300000000000000
1999-01-01	10.600000000000000
2000-01-01	10.600000000000000
2001-01-01	10.600000000000000
2002-01-01	10.600000000000000
2003-01-01	11.900000000000000
2004-01-01	11.800000000000000
2005-01-01	12.900000000000000
2006-01-01	13.500000000000000
2007-01-01	13.100000000000000
2008-01-01	11.900000000000000
2009-01-01	12.500000000000000
2010-01-01	11.277999999999999
2011-01-01	11.158400000000000
2012-01-01	11.495900000000000
2013-01-01	12.120700000000000
2014-01-01	12.548100000000000
2015-01-01	12.280700000000000
2016-01-01	11.233700000000000