Quarter	Percent
1983-06-30	18.3
1983-09-30	16.3
1983-12-31	15.8
1984-03-31	17.1
1984-06-30	17
1984-09-30	17.2
1984-12-31	17.9
1985-03-31	18.3
1985-06-30	18.2
1985-09-30	17.4
1985-12-31	17
1986-03-31	16.6
1986-06-30	17.1
1986-09-30	18
1986-12-31	20
1987-03-31	19
1987-06-30	19.4
1987-09-30	20.1
1987-12-31	19.1
1988-03-31	21.1
1988-06-30	22.8
1988-09-30	24.2
1988-12-31	24.5
1989-03-31	24.2
1989-06-30	22.5
1989-09-30	22.1
1989-12-31	21.3
1990-03-31	20.6
1990-06-30	19
1990-09-30	15.9
1990-12-31	14
1991-03-31	11.4
1991-06-30	9
1991-09-30	7.8
1991-12-31	6.5
1992-03-31	5.2
1992-06-30	5.5
1992-09-30	4.9
1992-12-31	4.3
1993-03-31	4.1
1993-06-30	3.3
1993-09-30	3.5
1993-12-31	3.9
1994-03-31	3.6
1994-06-30	3.7
1994-09-30	4.1
1994-12-31	5.2
1995-03-31	7.1
1995-06-30	7.8
1995-09-30	8
1995-12-31	8.5
1996-03-31	8.8
1996-06-30	9.3
1996-09-30	9.3
1996-12-31	8.5
1997-03-31	9.1
1997-06-30	9.6
1997-09-30	8.7
1997-12-31	8.9
1998-03-31	8.6
1998-06-30	7.8
1998-09-30	8.9
1998-12-31	7.7
1999-03-31	7.4
1999-06-30	7.8
1999-09-30	7
1999-12-31	9.1
2000-03-31	10.6
2000-06-30	11.2
2000-09-30	13
2000-12-31	12.4
2001-03-31	11.6
2001-06-30	11.1
2001-09-30	9.7
2001-12-31	8.8
2002-03-31	7.8
2002-06-30	8.1
2002-09-30	9.4
2002-12-31	10.4
2003-03-31	10.6
2003-06-30	11.2
2003-09-30	10.7
2003-12-31	11.7
2004-03-31	12.2
2004-06-30	12.3
2004-09-30	13.8
2004-12-31	12.8
2005-03-31	12.7
2005-06-30	12.5
2005-09-30	11.9
2005-12-31	12.1
2006-03-31	13.3
2006-06-30	15.6
2006-09-30	15.1
2006-12-31	14.9
2007-03-31	14.5
2007-06-30	13.3
2007-09-30	15.2
2007-12-31	15
2008-03-31	13.8
2008-06-30	14.6
2008-09-30	14.4
2008-12-31	17.4
2009-03-31	17.8
2009-06-30	11.4
2009-09-30	7.5
2009-12-31	3
2010-03-31	0.1
2010-06-30	0.9
2010-09-30	-0.9
2010-12-31	-2.7
2011-03-31	-2.5
2011-06-30	-1.5
2011-09-30	-0.8
2011-12-31	-1.8
2012-03-31	-4.3
2012-06-30	-6.4
2012-09-30	-6.2
2012-12-31	-2.8
2013-03-31	-1.9
2013-06-30	-1.1
2013-09-30	0.2
2013-12-31	-2.9
2014-03-31	-4.1
2014-06-30	-3.6
2014-09-30	-4.6
2014-12-31	-3.6
2015-03-31	-1.2
2015-06-30	-1
2015-09-30	-0.1
2015-12-31	0.7
2016-03-31	2.4
2016-06-30	3.6
2016-09-30	3.3
2016-12-31	3.9
2017-03-31	4.9
2017-06-30	5.3
2017-09-30	6
2017-12-31	5.5
2018-03-31	3
2018-06-30	2.4
2018-09-30	1.5
2018-12-31	2.3
2019-03-31	3.2
2019-06-30	3
2019-09-30	5.1
2019-12-31	5.1
2020-03-31	7
2020-06-30	6.9
2020-09-30	4.3
2020-12-31	3.9
2021-03-31	0.4
2021-06-30	1.8
2021-09-30	1.5
2021-12-31	2.1
2022-03-31	4.1
2022-06-30	2.6
2022-09-30	4.6
2022-12-31	1.5
2023-03-31	-1
2023-06-30	-1.5
2023-09-30	-3.1
2023-12-31	-0.8