Quarter	Percent
2000-04-01	69.3
2001-04-01	69.1
2002-04-01	69.3
2003-04-01	69.5
2004-04-01	69.4
2005-01-01	69.5
2005-04-01	69.8
2005-07-01	70.0
2005-10-01	69.9
2006-01-01	69.7
2006-04-01	70.0
2006-07-01	70.2
2006-10-01	70.1
2007-01-01	69.7
2007-04-01	70.1
2007-07-01	70.6
2007-10-01	70.2
2008-01-01	70.0
2008-04-01	70.3
2008-07-01	70.6
2008-10-01	70.3
2009-01-01	69.9
2009-04-01	70.0
2009-07-01	70.0
2009-10-01	70.0
2010-01-01	69.7
2010-04-01	69.8
2010-07-01	69.8
2010-10-01	69.7
2011-01-01	69.4
2011-04-01	69.7
2011-07-01	69.8
2011-10-01	69.8
2012-01-01	69.5
2012-04-01	69.9
2012-07-01	70.1
2012-10-01	69.9
2013-01-01	69.5
2013-04-01	69.7
2013-07-01	69.8
2013-10-01	69.6
2014-01-01	69.3
2014-04-01	69.4
2014-07-01	69.6
2014-10-01	69.6
2015-01-01	69.3
2015-04-01	69.4
2015-07-01	69.6
2015-10-01	69.6
2016-01-01	69.4
2016-04-01	69.7
2016-07-01	69.9
2016-10-01	69.8
2017-01-01	69.4
2017-04-01	69.7
2017-07-01	70.1
2017-10-01	69.9
2018-01-01	69.6
2018-04-01	69.9