Quarter	Percent
1999-04-01	6.1
2000-01-01	13.5
2000-04-01	8.6
2000-07-01	9.9
2000-10-01	14.1
2001-01-01	9.8
2001-04-01	9.2
2001-07-01	9.8
2001-10-01	10.5
2002-01-01	8.9
2002-04-01	10.2
2002-07-01	9.1
2002-10-01	9.9
2003-01-01	8.0
2003-04-01	7.4
2003-07-01	8.9
2003-10-01	6.8
2004-07-01	6.5
2004-10-01	7.0
2005-01-01	8.3
2008-10-01	7.1
2009-01-01	6.8
2009-04-01	7.7
2009-07-01	11.4
2009-10-01	11.4
2010-01-01	15.4
2010-04-01	17.2
2010-07-01	18
2010-10-01	14.7
2011-01-01	15
2011-04-01	11.1
2011-07-01	7.8
2011-10-01	12.2
2012-01-01	9.1
2012-04-01	7.0
2012-07-01	6.4
2012-10-01	6.1
2013-01-01	6.3
2013-04-01	6.2
2013-07-01	5.8
2013-10-01	5.9
2014-01-01	6.7
2014-04-01	5.9
2014-07-01	5.1
2014-10-01	4.1
2015-01-01	6.9
2015-04-01	7.0
2015-07-01	5.2
2015-10-01	5.0
2016-01-01	8.2
2016-04-01	8.1
2016-07-01	7.5
2016-10-01	8.4
2017-01-01	6.2
2017-04-01	5.0
2017-07-01	6.1
2017-10-01	5.6
2018-01-01	6.8
2018-04-01	6.7