Quarter	Percent, Seasonally Adjusted
1986-01-01	64.2
1986-04-01	64.0
1986-07-01	63.9
1986-10-01	63.4
1987-01-01	63.9
1987-04-01	63.6
1987-07-01	63.6
1987-10-01	63.2
1988-01-01	62.2
1988-04-01	61.5
1988-07-01	60.5
1988-10-01	60.3
1989-01-01	59.5
1989-04-01	58.7
1989-07-01	58.8
1989-10-01	58.8
1990-01-01	58.9
1990-04-01	59.2
1990-07-01	58.7
1990-10-01	58.2
1991-01-01	57.7
1991-04-01	57.3
1991-07-01	56.8
1991-10-01	56.4
1992-01-01	56.7
1992-04-01	56.8
1992-07-01	56.4
1992-10-01	56.5
1993-01-01	56.7
1993-04-01	56.8
1993-07-01	57.2
1993-10-01	57.6
1994-01-01	58
1994-04-01	58.4
1994-07-01	59
1994-10-01	59.6
1995-01-01	60
1995-04-01	60.4
1995-07-01	60.8
1995-10-01	61
1996-01-01	61.2
1996-04-01	61.6
1996-07-01	61.8
1996-10-01	61.2
1997-01-01	61.1
1997-04-01	61.2
1997-07-01	61
1997-10-01	60.7
1998-01-01	60.4
1998-04-01	60.0
1998-07-01	59.9
1998-10-01	59.6
1999-01-01	60.3
1999-04-01	60.4
1999-07-01	60.5
1999-10-01	61
2000-01-01	60.9
2000-04-01	60.8
2000-07-01	61.4
2000-10-01	61.8
2001-01-01	61.8
2001-04-01	62.2
2001-07-01	62.2
2001-10-01	62.6
2002-01-01	63.1
2002-04-01	63.2
2002-07-01	62.8
2002-10-01	62.9
2003-01-01	62.8
2003-04-01	63.0
2003-07-01	63.5
2003-10-01	63.3
2004-01-01	63.6
2004-04-01	63.8
2004-07-01	64.4
2004-10-01	65.1
2005-01-01	64.8
2005-04-01	64.8
2005-07-01	65.5
2005-10-01	65.3
2006-01-01	65.6
2006-04-01	65.9
2006-07-01	65.5
2006-10-01	65.3
2007-01-01	65.8
2007-04-01	66.0
2007-07-01	65.8
2007-10-01	66.1
2008-01-01	65.9
2008-04-01	65.8
2008-07-01	65.7
2008-10-01	65.9
2009-01-01	64.6
2009-04-01	64.4
2009-07-01	63.6
2009-10-01	63.4
2010-01-01	63.5
2010-04-01	63.4
2010-07-01	63.8
2010-10-01	63.4
2011-01-01	63.9
2011-04-01	63.9
2011-07-01	64.0
2011-10-01	63.8
2012-01-01	63.8
2012-04-01	63.7
2012-07-01	63.4
2012-10-01	63.4
2013-01-01	63.4
2013-04-01	63.5
2013-07-01	64.3
2013-10-01	64.5
2014-01-01	64.8
2014-04-01	64.7
2014-07-01	65.0
2014-10-01	65.5
2015-01-01	65.5
2015-04-01	65.2
2015-07-01	64.5
2015-10-01	64.9
2016-01-01	65.2
2016-04-01	66.3
2016-07-01	66.6
2016-10-01	66.8
2017-01-01	67.1
2017-04-01	66.8
2017-07-01	67.7
2017-10-01	67.7
2018-01-01	67.7
2018-04-01	67.8
2018-07-01	68.3