Quarter	Percent
1995-01-01	13.3
1995-04-01	13.2
1995-07-01	13.4
1995-10-01	12.9
1996-01-01	13.9
1996-04-01	13.6
1996-07-01	13.1
1996-10-01	12.9
1997-01-01	13.8
1997-04-01	13.3
1997-07-01	12.7
1997-10-01	12.1
1998-01-01	13.0
1998-04-01	12.5
1998-07-01	12.5
1998-10-01	12.0
1999-01-01	12.8
1999-04-01	12.3
1999-07-01	11.9
1999-10-01	11.4
2000-01-01	11.9
2000-04-01	11.4
2000-07-01	11.1
2000-10-01	10.7
2001-01-01	11.5
2001-04-01	11.4
2001-07-01	11.8
2001-10-01	11.9
2002-01-01	13.1
2002-04-01	12.6
2002-07-01	12.5
2002-10-01	12.0
2003-01-01	13.1
2003-04-01	13.6
2003-07-01	13.1
2003-10-01	12.2
2004-01-01	13.3
2004-04-01	13.2
2004-07-01	12.9
2004-10-01	12.5
2005-01-01	13.3
2005-04-01	12.9
2005-07-01	12.6
2005-10-01	12.1
2006-01-01	12.6
2006-04-01	12.1
2006-07-01	12.3
2006-10-01	11.5
2007-01-01	11.9
2007-04-01	11.6
2007-07-01	11.9
2007-10-01	11.5
2008-01-01	12.0
2008-04-01	12.5
2008-07-01	13.2
2008-10-01	13.2
2009-01-01	15.6
2009-04-01	16.6
2009-07-01	17.2
2009-10-01	16.7
2010-01-01	17.7
2010-04-01	17.3
2010-07-01	16.7
2010-10-01	16.2
2011-01-01	16.8
2011-04-01	16.3
2011-07-01	16.4
2011-10-01	15.7
2012-01-01	16.5
2012-04-01	16.2
2012-07-01	16.2
2012-10-01	15.6
2013-01-01	16.5
2013-04-01	16.1
2013-07-01	15.7
2013-10-01	14.4
2014-01-01	15.2
2014-04-01	14.1
2014-07-01	14.2
2014-10-01	13.1
2015-01-01	13.6
2015-04-01	13.1
2015-07-01	12.7
2015-10-01	11.8
2016-01-01	12.2
2016-04-01	11.9
2016-07-01	11.9
2016-10-01	11.1
2017-01-01	11.2
2017-04-01	10.6
2017-07-01	10.7