Quarter	Percent, Seasonally Adjusted
1986-01-01	77.2
1986-04-01	76.8
1986-07-01	76.4
1986-10-01	75.6
1987-01-01	76.1
1987-04-01	75.4
1987-07-01	75.3
1987-10-01	74.4
1988-01-01	73.1
1988-04-01	72.2
1988-07-01	70.8
1988-10-01	70.6
1989-01-01	70
1989-04-01	69.1
1989-07-01	69.0
1989-10-01	69
1990-01-01	68.6
1990-04-01	68.3
1990-07-01	68.0
1990-10-01	67.4
1991-01-01	66.5
1991-04-01	65.9
1991-07-01	65.2
1991-10-01	64.7
1992-01-01	65.2
1992-04-01	65.0
1992-07-01	64.7
1992-10-01	64.6
1993-01-01	65.1
1993-04-01	65.5
1993-07-01	65.6
1993-10-01	66.1
1994-01-01	66.3
1994-04-01	67
1994-07-01	67.6
1994-10-01	67.9
1995-01-01	68.8
1995-04-01	69.3
1995-07-01	69.5
1995-10-01	69.8
1996-01-01	69.7
1996-04-01	69.8
1996-07-01	70
1996-10-01	69.7
1997-01-01	69.3
1997-04-01	69.4
1997-07-01	69.2
1997-10-01	69
1998-01-01	68.6
1998-04-01	68.0
1998-07-01	67.5
1998-10-01	67.2
1999-01-01	67.6
1999-04-01	67.8
1999-07-01	68.0
1999-10-01	68.9
2000-01-01	68.6
2000-04-01	68.7
2000-07-01	69.1
2000-10-01	69.4
2001-01-01	69.4
2001-04-01	69.5
2001-07-01	70.0
2001-10-01	70.0
2002-01-01	71.1
2002-04-01	70.8
2002-07-01	70.5
2002-10-01	70.4
2003-01-01	70.4
2003-04-01	70.4
2003-07-01	70.7
2003-10-01	70.4
2004-01-01	71.0
2004-04-01	71.9
2004-07-01	71.9
2004-10-01	72.5
2005-01-01	72.2
2005-04-01	72
2005-07-01	72.7
2005-10-01	72.7
2006-01-01	72.8
2006-04-01	73
2006-07-01	72.8
2006-10-01	72.9
2007-01-01	73
2007-04-01	73
2007-07-01	73.3
2007-10-01	72.8
2008-01-01	72.6
2008-04-01	72.3
2008-07-01	71.9
2008-10-01	72.4
2009-01-01	70.7
2009-04-01	70.9
2009-07-01	69.3
2009-10-01	69.4
2010-01-01	69.7
2010-04-01	69.4
2010-07-01	70.4
2010-10-01	69.6
2011-01-01	70.0
2011-04-01	69.8
2011-07-01	70.2
2011-10-01	69.7
2012-01-01	69.9
2012-04-01	69.3
2012-07-01	68.8
2012-10-01	68.9
2013-01-01	69.0
2013-04-01	69.2
2013-07-01	70.0
2013-10-01	70.4
2014-01-01	70.6
2014-04-01	70.9
2014-07-01	70.7
2014-10-01	71.0
2015-01-01	71.2
2015-04-01	71.0
2015-07-01	70.1
2015-10-01	70.4
2016-01-01	70.6
2016-04-01	71.7
2016-07-01	72.2
2016-10-01	72.4
2017-01-01	72.9
2017-04-01	72.4
2017-07-01	73.3
2017-10-01	73.3
2018-01-01	73.1
2018-04-01	72.9
2018-07-01	73.2