Quarter	Percent, Seasonally adjusted
1988-03-31	19.4
1988-06-30	20.2
1988-09-30	21.4
1988-12-31	20.5
1989-03-31	19.5
1989-06-30	17.9
1989-09-30	16.2
1989-12-31	16.1
1990-03-31	15.6
1990-06-30	14.9
1990-09-30	13.6
1990-12-31	12.5
1991-03-31	11.3
1991-06-30	10.3
1991-09-30	9.3
1991-12-31	8.2
1992-03-31	7.4
1992-06-30	6.5
1992-09-30	5.9
1992-12-31	5.1
1993-03-31	4.4
1993-06-30	4.3
1993-09-30	4.3
1993-12-31	4.9
1994-03-31	5.2
1994-06-30	5.6
1994-09-30	5.9
1994-12-31	6
1995-03-31	6.1
1995-06-30	5.7
1995-09-30	5.4
1995-12-31	5.2
1996-03-31	5.2
1996-06-30	5.5
1996-09-30	5.9
1996-12-31	6.5
1997-03-31	6.9
1997-06-30	7.3
1997-09-30	7.2
1997-12-31	7.2
1998-03-31	7.2
1998-06-30	7.2
1998-09-30	7.6
1998-12-31	7.5
1999-03-31	7.8
1999-06-30	8.2
1999-09-30	8.7
1999-12-31	9.3
2000-03-31	9.5
2000-06-30	9.6
2000-09-30	9.1
2000-12-31	8.9
2001-03-31	8.8
2001-06-30	9.1
2001-09-30	9.9
2001-12-31	10.6
2002-03-31	11.4
2002-06-30	12.1
2002-09-30	12.9
2002-12-31	13.7
2003-03-31	14.1
2003-06-30	14.3
2003-09-30	14.6
2003-12-31	14.8
2004-03-31	15
2004-06-30	15.1
2004-09-30	14.5
2004-12-31	13.3
2005-03-31	12.1
2005-06-30	11.1
2005-09-30	10.3
2005-12-31	10.1
2006-03-31	10
2006-06-30	10
2006-09-30	10.2
2006-12-31	10.5
2007-03-31	10.4
2007-06-30	10.2
2007-09-30	10.1
2007-12-31	9.2
2008-03-31	8.3
2008-06-30	7
2008-09-30	4.9
2008-12-31	3.2
2009-03-31	1.7
2009-06-30	0.8
2009-09-30	0.4
2009-12-31	0.5
2010-03-31	0.5
2010-06-30	0.4
2010-09-30	0.4
2010-12-31	0.3
2011-03-31	0.2
2011-06-30	0.3
2011-09-30	0.4
2011-12-31	0.4
2012-03-31	0.6
2012-06-30	0.7
2012-09-30	0.8
2012-12-31	0.9
2013-03-31	0.9
2013-06-30	1.1
2013-09-30	1.3
2013-12-31	1.5
2014-03-31	1.9
2014-06-30	2.2
2014-09-30	2.3
2014-12-31	2.4
2015-03-31	2.5
2015-06-30	2.6
2015-09-30	3
2015-12-31	3.5
2016-03-31	4.2
2016-06-30	4.2
2016-09-30	4.1
2016-12-31	4.1
2017-03-31	3.8
2017-06-30	4.1
2017-09-30	4.3
2017-12-31	4.3
2018-03-31	4.2
2018-06-30	4.2
2018-09-30	4
2018-12-31	3.8
2019-03-31	3.8
2019-06-30	3.6
2019-09-30	3.7
2019-12-31	3.9
2020-03-31	3.7
2020-06-30	2.1
2020-09-30	1.9
2020-12-31	1.8
2021-03-31	2.3
2021-06-30	4.6
2021-09-30	4.7
2021-12-31	4.4
2022-03-31	4.4
2022-06-30	3.9
2022-09-30	4.2
2022-12-31	4.1
2023-03-31	3.2
2023-06-30	2.2
2023-09-30	1.4
2023-12-31	1