Quarter	Percent
1999-04-01	2.4
2000-04-01	2.2
2002-04-01	2.8
2003-01-01	3.1
2003-04-01	2.2
2003-07-01	2.4
2003-10-01	2.3
2004-07-01	2.6
2005-01-01	2.0
2006-04-01	2.2
2006-07-01	2.4
2007-07-01	1.9
2008-07-01	2.1
2009-01-01	4.8
2009-04-01	5.9
2009-07-01	4.9
2009-10-01	4.2
2010-01-01	4.9
2010-04-01	6.3
2010-07-01	6.5
2010-10-01	4.9
2011-01-01	4.4
2011-04-01	6.1
2011-07-01	6.5
2011-10-01	5.8
2012-01-01	5.2
2012-04-01	4.7
2012-07-01	4.7
2012-10-01	2.9
2013-01-01	5.6
2013-04-01	5.7
2013-07-01	4.2
2013-10-01	4.3
2014-01-01	5.0
2014-04-01	5.7
2014-07-01	4.7
2014-10-01	4.4
2015-01-01	3.3
2015-04-01	4.8
2015-07-01	4.5
2015-10-01	2.3
2016-01-01	1.6
2016-04-01	3.4
2016-07-01	3.4
2016-10-01	2.6
2017-01-01	1.9
2017-04-01	2.2
2017-07-01	1.9
2017-10-01	1.9
2018-01-01	2.7
2018-04-01	2.1