Quarter	Percent
1987-09-30	34.3
1987-12-31	30.1
1988-03-31	27.2
1988-06-30	28.2
1988-09-30	32.5
1988-12-31	25.4
1989-03-31	20.2
1989-06-30	26.5
1989-09-30	25.8
1989-12-31	18
1990-03-31	10.7
1990-06-30	11.2
1990-09-30	11.7
1990-12-31	6.1
1991-03-31	5.1
1991-06-30	6.8
1991-09-30	5.2
1991-12-31	2.1
1992-03-31	0.1
1992-06-30	-0.9
1992-09-30	2
1992-12-31	2.9
1993-03-31	0.8
1993-06-30	3.8
1993-09-30	6.6
1993-12-31	7
1994-03-31	5.8
1994-06-30	8.6
1994-09-30	11.7
1994-12-31	11.6
1995-03-31	10.9
1995-06-30	10.6
1995-09-30	12.7
1995-12-31	14.8
1996-03-31	12.3
1996-06-30	12.4
1996-09-30	18.3
1996-12-31	18.1
1997-03-31	13.2
1997-06-30	15.3
1997-09-30	14
1997-12-31	12.7
1998-03-31	16
1998-06-30	15.3
1998-09-30	14.3
1998-12-31	12.7
1999-03-31	12.1
1999-06-30	13.3
1999-09-30	12.9
1999-12-31	11.5
2000-03-31	11.6
2000-06-30	10.9
2000-09-30	7.7
2000-12-31	7.4
2001-03-31	9.3
2001-06-30	12.1
2001-09-30	13.1
2001-12-31	13.6
2002-03-31	14.3
2002-06-30	13.7
2002-09-30	14.7
2002-12-31	14.4
2003-03-31	11.7
2003-06-30	11.2
2003-09-30	11.1
2003-12-31	9.6
2004-03-31	10.8
2004-06-30	12.7
2004-09-30	11.4
2004-12-31	9.6
2005-03-31	10.4
2005-06-30	11.4
2005-09-30	9
2005-12-31	6.2
2006-03-31	5.9
2006-06-30	6.9
2006-09-30	6.7
2006-12-31	6.2
2007-03-31	4.6
2007-06-30	5
2007-09-30	6.9
2007-12-31	6.2
2008-03-31	4.9
2008-06-30	4.4
2008-09-30	2.2
2008-12-31	0
2009-03-31	-0.8
2009-06-30	-1.6
2009-09-30	-4.4
2009-12-31	-5.3
2010-03-31	-4.3
2010-06-30	-4.1
2010-09-30	-4.4
2010-12-31	-2.7
2011-03-31	-2
2011-06-30	-2.9
2011-09-30	-2
2011-12-31	-2.3
2012-03-31	-1.9
2012-06-30	-0.7
2012-09-30	1.1
2012-12-31	2.7
2013-03-31	3.3
2013-06-30	3.3
2013-09-30	6.7
2013-12-31	7
2014-03-31	5.8
2014-06-30	6.2
2014-09-30	8.2
2014-12-31	8.6
2015-03-31	8.1
2015-06-30	9.4
2015-09-30	10.6
2015-12-31	10.7
2016-03-31	11.2
2016-06-30	12.4
2016-09-30	11.6
2016-12-31	10.5
2017-03-31	10.5
2017-06-30	11.2
2017-09-30	11.2
2017-12-31	10.7
2018-03-31	8.2
2018-06-30	9.2
2018-09-30	9.6
2018-12-31	6.7
2019-03-31	5.9
2019-06-30	7.1
2019-09-30	7.9
2019-12-31	6.8
2020-03-31	3.7
2020-06-30	-6.1
2020-09-30	-6.1
2020-12-31	-0.4
2021-03-31	-3
2021-06-30	0.2
2021-09-30	2.6
2021-12-31	2.4
2022-03-31	3.5
2022-06-30	6
2022-09-30	6.5
2022-12-31	4.1
2023-03-31	4.3
2023-06-30	7.1
2023-09-30	7.6
2023-12-31	6.4