Quarter	Percent
1998-04-01	7.68
1998-07-01	7.67
1998-10-01	9.60
1999-01-01	9.07
1999-04-01	9.31
1999-07-01	9.03
1999-10-01	11.10
2000-01-01	10.93
2000-04-01	11.88
2000-07-01	11.04
2000-10-01	13.46
2001-01-01	9.84
2001-04-01	13.30
2001-07-01	12.48
2001-10-01	13.06
2002-01-01	10.12
2002-04-01	10.02
2002-07-01	7.22
2002-10-01	6.52
2003-01-01	4.79
2003-04-01	5.29
2003-07-01	4.75
2003-10-01	5.14
2004-01-01	5.16
2004-04-01	5.65
2004-07-01	6.85
2004-10-01	7.63
2005-01-01	8.70
2005-04-01	8.65
2005-07-01	9.90
2005-10-01	9.31
2006-01-01	10.40
2006-04-01	11.80
2006-07-01	13.35
2006-10-01	16.15
2007-01-01	13.55
2007-04-01	13.60
2007-07-01	13.01
2007-10-01	14.04
2008-01-01	15.26
2008-04-01	15.75
2008-07-01	15.75
2008-10-01	18.25
2009-01-01	14.25
2009-04-01	9.33
2009-07-01	8.45
2009-10-01	9.00
2010-01-01	8.00
2010-04-01	7.05
2010-07-01	5.75
2010-10-01	4.60
2011-01-01	3.75
2011-04-01	3.75
2011-07-01	3.75
2011-10-01	4.30
2012-01-01	4.00
2012-04-01	5.35
2012-07-01	5.00
2012-10-01	5.35
2013-01-01	5.55
2013-04-01	5.25
2013-07-01	5.25
2013-10-01	5.25
2014-01-01	5.25
2014-04-01	5.25
2014-07-01	5.20
2014-10-01	4.50
2015-01-01	4.50
2015-04-01	4.95
2015-07-01	5.40
2015-10-01	5.65
2016-01-01	5.65
2016-04-01	5.70
2016-07-01	5.15
2016-10-01	4.85
2017-01-01	4.85
2017-04-01	4.35
2017-07-01	4.35
2017-10-01	4.10
2018-01-01	4.13
2018-04-01	4.05
2018-07-01	4.03