Quarter	Percent
1998-01-01	95.0
1998-04-01	95.0
1998-07-01	95.2
1998-10-01	95.1
1999-01-01	95
1999-04-01	95.1
1999-07-01	95.2
1999-10-01	95
2000-01-01	94.9
2000-04-01	95
2000-07-01	94.9
2000-10-01	94.9
2001-01-01	95
2001-04-01	94.9
2001-07-01	94.9
2001-10-01	94.9
2002-01-01	94.7
2002-04-01	94.8
2002-07-01	94.9
2002-10-01	94.9
2003-01-01	94.4
2003-04-01	94.5
2003-07-01	94.5
2003-10-01	94.4
2004-01-01	94.2
2004-04-01	94.6
2004-07-01	94.8
2004-10-01	94.7
2005-01-01	94.6
2005-04-01	95
2005-07-01	95.1
2005-10-01	94.7
2006-01-01	94.6
2006-04-01	94.9
2006-07-01	94.9
2006-10-01	94.9
2007-01-01	94.7
2007-04-01	95.1
2007-07-01	95.2
2007-10-01	95.2
2008-01-01	94.7
2008-04-01	94.8
2008-07-01	94.8
2008-10-01	94.8
2009-01-01	94.6
2009-04-01	94.9
2009-07-01	95.3
2009-10-01	95.5
2010-01-01	95.2
2010-04-01	95.6
2010-07-01	95.8
2010-10-01	95.4
2011-01-01	95.1
2011-04-01	95.4
2011-07-01	95.4
2011-10-01	95.4
2012-01-01	95.2
2012-04-01	95.4
2012-07-01	95.7
2012-10-01	95.6
2013-01-01	95.6
2013-04-01	96
2013-07-01	95.9
2013-10-01	95.8
2014-01-01	95.6
2014-04-01	95.6
2014-07-01	95.7
2014-10-01	95.6
2015-01-01	95.5
2015-04-01	95.3
2015-07-01	95.6
2015-10-01	95.3
2016-01-01	95.3
2016-04-01	95.2
2016-07-01	95.5
2016-10-01	95.5
2017-01-01	95.3
2017-04-01	95.4
2017-07-01	95.9
2017-10-01	96.0
2018-01-01	95.5
2018-04-01	96.0