Quarter	Percent
2000-04-01	82.2
2001-04-01	82.1
2002-04-01	82.6
2003-04-01	83.3
2004-04-01	83.7
2005-01-01	83.9
2005-04-01	84.0
2005-07-01	83.7
2005-10-01	84.1
2006-01-01	84.4
2006-04-01	84.5
2006-07-01	84.3
2006-10-01	84.6
2007-01-01	84.5
2007-04-01	84.6
2007-07-01	84.7
2007-10-01	85.0
2008-01-01	84.9
2008-04-01	85.1
2008-07-01	85
2008-10-01	85.2
2009-01-01	85.1
2009-04-01	85.1
2009-07-01	84.8
2009-10-01	85.3
2010-01-01	85.2
2010-04-01	85.3
2010-07-01	85
2010-10-01	85.4
2011-01-01	85.1
2011-04-01	85.3
2011-07-01	85
2011-10-01	85.5
2012-01-01	85.5
2012-04-01	85.7
2012-07-01	85.4
2012-10-01	85.8
2013-01-01	85.6
2013-04-01	85.7
2013-07-01	85.3
2013-10-01	85.6
2014-01-01	85.4
2014-04-01	85.4
2014-07-01	85.2
2014-10-01	85.6
2015-01-01	85.3
2015-04-01	85.5
2015-07-01	85.1
2015-10-01	85.5
2016-01-01	85.3
2016-04-01	85.5
2016-07-01	85.4
2016-10-01	85.6
2017-01-01	85.4
2017-04-01	85.5
2017-07-01	85.4
2017-10-01	85.6
2018-01-01	85.5
2018-04-01	85.8