Year	Percent
1998-01-01	11.7700000000000000
1999-01-01	11.7700000000000000
2000-01-01	8.8300000000000000
2001-01-01	6.6891700000000000
2002-01-01	13.6300000000000000
2003-01-01	13.1500000000000000
2004-01-01	11.5008000000000000
2005-01-01	11.5819000000000000
2006-01-01	9.0443100000000010
2007-01-01	6.7047399999999990
2008-01-01	6.7820000000000000
2009-01-01	6.4592000000000000
2010-01-01	7.4596300000000010
2011-01-01	6.3959699999999990
2012-01-01	5.3257699999999994
2013-01-01	6.3263000000000000
2014-01-01	6.2465900000000000
2015-01-01	7.2126199999999990
2016-01-01	15.0236000000000000