Quarter	Percent, Seasonally Adjusted
1986-01-01	67.1
1986-04-01	66.8
1986-07-01	66.7
1986-10-01	66.3
1987-01-01	66.6
1987-04-01	66.4
1987-07-01	66.3
1987-10-01	66.1
1988-01-01	65.4
1988-04-01	65
1988-07-01	64.6
1988-10-01	64.4
1989-01-01	64
1989-04-01	63.5
1989-07-01	63.4
1989-10-01	63.5
1990-01-01	63.5
1990-04-01	64.1
1990-07-01	63.9
1990-10-01	63.9
1991-01-01	64
1991-04-01	64.0
1991-07-01	63.9
1991-10-01	63.4
1992-01-01	63.6
1992-04-01	63.4
1992-07-01	63.1
1992-10-01	63.2
1993-01-01	63
1993-04-01	63.2
1993-07-01	63.3
1993-10-01	63.6
1994-01-01	64.0
1994-04-01	63.9
1994-07-01	64.1
1994-10-01	64.5
1995-01-01	64.4
1995-04-01	64.5
1995-07-01	64.8
1995-10-01	65.2
1996-01-01	65.3
1996-04-01	65.6
1996-07-01	66.1
1996-10-01	65.3
1997-01-01	65.4
1997-04-01	65.6
1997-07-01	65.5
1997-10-01	65.2
1998-01-01	65.3
1998-04-01	65.2
1998-07-01	64.9
1998-10-01	64.8
1999-01-01	65.1
1999-04-01	65.1
1999-07-01	65
1999-10-01	65.2
2000-01-01	65.1
2000-04-01	64.9
2000-07-01	65.3
2000-10-01	65.6
2001-01-01	65.4
2001-04-01	65.8
2001-07-01	65.7
2001-10-01	66.3
2002-01-01	66.7
2002-04-01	66.7
2002-07-01	66.5
2002-10-01	66.2
2003-01-01	66.1
2003-04-01	66.1
2003-07-01	66.5
2003-10-01	66.4
2004-01-01	66.4
2004-04-01	66.6
2004-07-01	66.9
2004-10-01	67.7
2005-01-01	67.4
2005-04-01	67.4
2005-07-01	68.1
2005-10-01	67.8
2006-01-01	68.4
2006-04-01	68.4
2006-07-01	68.1
2006-10-01	67.9
2007-01-01	68.5
2007-04-01	68.5
2007-07-01	68.2
2007-10-01	68.4
2008-01-01	68.4
2008-04-01	68.4
2008-07-01	68.4
2008-10-01	69.0
2009-01-01	67.9
2009-04-01	68.3
2009-07-01	67.7
2009-10-01	67.8
2010-01-01	67.5
2010-04-01	67.8
2010-07-01	67.9
2010-10-01	67.5
2011-01-01	67.9
2011-04-01	68.0
2011-07-01	68.0
2011-10-01	67.9
2012-01-01	68.1
2012-04-01	68.0
2012-07-01	67.9
2012-10-01	67.6
2013-01-01	67.3
2013-04-01	67.5
2013-07-01	68.2
2013-10-01	68.3
2014-01-01	68.6
2014-04-01	68.3
2014-07-01	68.6
2014-10-01	69.3
2015-01-01	69.3
2015-04-01	68.9
2015-07-01	68.3
2015-10-01	68.2
2016-01-01	68.8
2016-04-01	69.8
2016-07-01	70.1
2016-10-01	70.5
2017-01-01	70.6
2017-04-01	70.1
2017-07-01	71.1
2017-10-01	70.9
2018-01-01	70.8
2018-04-01	70.9
2018-07-01	71.1