Quarter	Percent
1987-12-31	4.5
1988-03-31	5.4
1988-06-30	20.8
1988-09-30	30.3
1988-12-31	28.9
1989-03-31	25.6
1989-06-30	17.7
1989-09-30	11.9
1989-12-31	12.1
1990-03-31	17
1990-06-30	14.4
1990-09-30	9.6
1990-12-31	11.4
1991-03-31	3
1991-06-30	1.3
1991-09-30	-2.1
1991-12-31	-5
1992-03-31	-4.4
1992-06-30	-3.2
1992-09-30	-0.5
1992-12-31	0.5
1993-03-31	-3.1
1993-06-30	-5.1
1993-09-30	-7.3
1993-12-31	-9.7
1994-03-31	-9.5
1994-06-30	-10
1994-09-30	-8.7
1994-12-31	-6.3
1995-03-31	10.8
1995-06-30	10
1995-09-30	10.8
1995-12-31	12.6
1996-03-31	1.6
1996-06-30	8.9
1996-09-30	9.6
1996-12-31	9.8
1997-03-31	5.4
1997-06-30	4.4
1997-09-30	6.2
1997-12-31	5.1
1998-03-31	7
1998-06-30	6.2
1998-09-30	2.4
1998-12-31	4.7
1999-03-31	2.2
1999-06-30	2.5
1999-09-30	1.5
1999-12-31	-0.6
2000-03-31	-0.8
2000-06-30	1.1
2000-09-30	7
2000-12-31	-0.4
2001-03-31	-1.3
2001-06-30	-4.4
2001-09-30	-6.8
2001-12-31	-10.4
2002-03-31	-13.4
2002-06-30	-14.8
2002-09-30	-16.2
2002-12-31	-8.5
2003-03-31	-7.5
2003-06-30	-5.7
2003-09-30	-9.8
2003-12-31	-11.9
2004-03-31	-6.1
2004-06-30	-5.1
2004-09-30	-2.5
2004-12-31	-0.9
2005-03-31	-1.7
2005-06-30	1.7
2005-09-30	6.1
2005-12-31	9.2
2006-03-31	6.4
2006-06-30	5.8
2006-09-30	3.7
2006-12-31	2.8
2007-03-31	5.2
2007-06-30	2.5
2007-09-30	1.5
2007-12-31	-1.6
2008-03-31	0.5
2008-06-30	0.5
2008-09-30	1.2
2008-12-31	2.4
2009-03-31	-0.6
2009-06-30	-4.2
2009-09-30	-12.6
2009-12-31	-14.8
2010-03-31	-17.1
2010-06-30	-16.7
2010-09-30	-8.3
2010-12-31	-6.5
2011-03-31	-9.7
2011-06-30	-10.5
2011-09-30	-10.4
2011-12-31	-13.7
2012-03-31	-8.4
2012-06-30	0.2
2012-09-30	-3.9
2012-12-31	2.7
2013-03-31	1.7
2013-06-30	-7.4
2013-09-30	-5.9
2013-12-31	-3.4
2014-03-31	-6.2
2014-06-30	-0.4
2014-09-30	8
2014-12-31	2.6
2015-03-31	7.4
2015-06-30	4.7
2015-09-30	1.7
2015-12-31	2.1
2016-03-31	2.7
2016-06-30	3.3
2016-09-30	0.2
2016-12-31	1.4
2017-03-31	-0.1
2017-06-30	3.3
2017-09-30	13.6
2017-12-31	14.2
2018-03-31	18
2018-06-30	26.2
2018-09-30	15.1
2018-12-31	21.5
2019-03-31	15.3
2019-06-30	8.7
2019-09-30	9.8
2019-12-31	-2.4
2020-03-31	12.1
2020-06-30	3.2
2020-09-30	-4.8
2020-12-31	-3.5
2021-03-31	-19
2021-06-30	-12.5
2021-09-30	-11.2
2021-12-31	-7.1
2022-03-31	3.4
2022-06-30	5.2
2022-09-30	8.7
2022-12-31	5.3
2023-03-31	-2.4
2023-06-30	-5.7
2023-09-30	-8
2023-12-31	-7.5