Quarter	Percent
1999-04-01	4.90
2003-04-01	12.20
2005-04-01	7.90
2006-04-01	11.50
2007-04-01	7.60
2008-01-01	7.00
2008-04-01	9.10
2008-10-01	8.30
2009-01-01	8.30
2009-04-01	16.10
2009-07-01	10.80
2009-10-01	11.90
2010-01-01	10.40
2010-04-01	17.70
2010-07-01	11.60
2010-10-01	15.90
2011-01-01	11.40
2011-04-01	14.50
2011-07-01	8.20
2011-10-01	7.60
2012-01-01	15.10
2012-04-01	19.50
2012-07-01	7.00
2012-10-01	7.40
2013-01-01	7.50
2013-04-01	11.50
2013-07-01	6.50
2013-10-01	5.50
2014-01-01	7.10
2014-04-01	9.70
2014-07-01	5.56
2014-10-01	3.52
2015-01-01	9.20
2015-04-01	11.20
2015-07-01	3.12
2015-10-01	2.61
2016-01-01	7.30
2016-04-01	9.10
2016-07-01	2.52
2016-10-01	6.00
2017-01-01	7.00
2017-04-01	9.40
2017-07-01	6.80
2017-10-01	4.90
2018-01-01	3.50
2018-04-01	8.00