Quarter	Percent
2002-04-01	9.50
2003-01-01	11.00
2003-04-01	12.70
2003-10-01	8.90
2004-01-01	9.80
2004-04-01	16.20
2005-01-01	13.80
2005-04-01	9.40
2005-10-01	10.20
2006-01-01	8.20
2006-04-01	13.50
2006-10-01	8.40
2007-04-01	12.30
2007-10-01	7.20
2008-04-01	12.20
2008-10-01	13.60
2009-01-01	16.20
2009-04-01	27.50
2009-07-01	13.50
2009-10-01	20.60
2010-01-01	22.30
2010-04-01	25.20
2010-07-01	10.80
2010-10-01	14.60
2011-01-01	21.30
2011-04-01	22.30
2011-07-01	10.30
2011-10-01	19.20
2012-01-01	19.30
2012-04-01	16.70
2012-07-01	8.90
2012-10-01	14.30
2013-01-01	14.60
2013-04-01	20.50
2013-07-01	8.30
2013-10-01	10.20
2014-01-01	16.10
2014-04-01	14.80
2014-07-01	8.50
2014-10-01	12.70
2015-01-01	10.40
2015-04-01	13.60
2015-07-01	7.10
2015-10-01	12.60
2016-01-01	7.50
2016-04-01	8.70
2016-07-01	5.03
2016-10-01	5.06
2017-01-01	9.00
2017-04-01	11.10
2017-07-01	6.30
2017-10-01	7.60
2018-01-01	5.90
2018-04-01	10.30