Quarter	Percent, Seasonally adjusted
1987-09-30	18.6
1987-12-31	19
1988-03-31	20.1
1988-06-30	21.4
1988-09-30	22.8
1988-12-31	19.7
1989-03-31	16.3
1989-06-30	16.2
1989-09-30	16
1989-12-31	16.1
1990-03-31	15.2
1990-06-30	13.7
1990-09-30	12.1
1990-12-31	11.2
1991-03-31	10.4
1991-06-30	9.3
1991-09-30	8.2
1991-12-31	7.1
1992-03-31	6.5
1992-06-30	5.8
1992-09-30	5.3
1992-12-31	4.3
1993-03-31	3.6
1993-06-30	4.3
1993-09-30	4.8
1993-12-31	5.4
1994-03-31	5.5
1994-06-30	5.9
1994-09-30	6.3
1994-12-31	6.1
1995-03-31	5.9
1995-06-30	5.4
1995-09-30	5
1995-12-31	5.1
1996-03-31	5.4
1996-06-30	5.9
1996-09-30	6.5
1996-12-31	7.1
1997-03-31	7.4
1997-06-30	7.4
1997-09-30	6.9
1997-12-31	6.9
1998-03-31	7.5
1998-06-30	7.5
1998-09-30	7.7
1998-12-31	7.6
1999-03-31	7.9
1999-06-30	8.8
1999-09-30	9.4
1999-12-31	9.7
2000-03-31	9.7
2000-06-30	9.5
2000-09-30	8.6
2000-12-31	8.3
2001-03-31	9
2001-06-30	10
2001-09-30	10.8
2001-12-31	11.3
2002-03-31	12
2002-06-30	12.9
2002-09-30	13.7
2002-12-31	14.4
2003-03-31	14.4
2003-06-30	14.1
2003-09-30	14.7
2003-12-31	15.4
2004-03-31	15.3
2004-06-30	14.7
2004-09-30	13.6
2004-12-31	11.9
2005-03-31	10.6
2005-06-30	10.3
2005-09-30	10
2005-12-31	9.8
2006-03-31	10
2006-06-30	10.2
2006-09-30	10.3
2006-12-31	10.8
2007-03-31	10.4
2007-06-30	9.6
2007-09-30	9.8
2007-12-31	8.8
2008-03-31	6.9
2008-06-30	5.1
2008-09-30	2.9
2008-12-31	1.2
2009-03-31	0.6
2009-06-30	0.5
2009-09-30	0.2
2009-12-31	0.5
2010-03-31	0.7
2010-06-30	0.3
2010-09-30	0.1
2010-12-31	0.2
2011-03-31	0.3
2011-06-30	0.4
2011-09-30	0.5
2011-12-31	0.4
2012-03-31	0.7
2012-06-30	1
2012-09-30	0.8
2012-12-31	0.9
2013-03-31	1
2013-06-30	1.2
2013-09-30	1.6
2013-12-31	1.9
2014-03-31	2.1
2014-06-30	2.5
2014-09-30	2.5
2014-12-31	2.4
2015-03-31	2.4
2015-06-30	2.8
2015-09-30	3.6
2015-12-31	4.2
2016-03-31	4.9
2016-06-30	4.2
2016-09-30	3.3
2016-12-31	3.9
2017-03-31	4.2
2017-06-30	4.3
2017-09-30	4.3
2017-12-31	4.4
2018-03-31	4.1
2018-06-30	4.1
2018-09-30	4
2018-12-31	3.6
2019-03-31	3.6
2019-06-30	3.6
2019-09-30	3.8
2019-12-31	4.1
2020-03-31	3.6
2020-06-30	0.2
2020-09-30	0.2
2020-12-31	3.4
2021-03-31	4.5
2021-06-30	5.8
2021-09-30	4.8
2021-12-31	3.1
2022-03-31	3.9
2022-06-30	4.8
2022-09-30	4.4
2022-12-31	3.4
2023-03-31	2
2023-06-30	1
2023-09-30	0.8
2023-12-31	0.9