Year	Percent
1998-01-01	0.09097300000000000
1999-01-01	0.07869700000000000
2000-01-01	0.07895400000000000
2001-01-01	0.09022600000000000
2002-01-01	0.07245599999999999
2003-01-01	0.07416500000000000
2004-01-01	0.14184300000000000
2005-01-01	0.16344200000000000
2006-01-01	0.15192700000000000
2007-01-01	0.14975000000000000
2008-01-01	0.16205200000000000
2009-01-01	0.16248500000000000
2010-01-01	0.14851900000000000
2011-01-01	0.14149700000000000
2012-01-01	0.13967000000000002
2013-01-01	0.13066400000000000
2014-01-01	0.12778800000000000
2015-01-01	0.12500700000000000
2016-01-01	0.12449900000000000
2017-01-01	0.12795399999999998