Quarter	Percent
1987-12-31	6.7
1988-03-31	36.1
1988-06-30	17.1
1988-09-30	29.1
1988-12-31	33.6
1989-03-31	20.8
1989-06-30	37.2
1989-09-30	32.1
1989-12-31	38.1
1990-03-31	27.2
1990-06-30	16.9
1990-09-30	17.1
1990-12-31	12.1
1991-03-31	30.1
1991-06-30	24.5
1991-09-30	15.5
1991-12-31	7.2
1992-03-31	-17.5
1992-06-30	-11.1
1992-09-30	-1.3
1992-12-31	-1.1
1993-03-31	5.3
1993-06-30	3.7
1993-09-30	-0.1
1993-12-31	6.4
1994-03-31	-0.7
1994-06-30	-3.4
1994-09-30	0.9
1994-12-31	0.3
1995-03-31	5.7
1995-06-30	22.3
1995-09-30	24.1
1995-12-31	18.6
1996-03-31	22.8
1996-06-30	15.5
1996-09-30	16.1
1996-12-31	13.5
1997-03-31	13.4
1997-06-30	10.9
1997-09-30	23.5
1997-12-31	23.2
1998-03-31	20.9
1998-06-30	15.3
1998-09-30	-0.3
1998-12-31	3
1999-03-31	0.5
1999-06-30	1
1999-09-30	6.7
1999-12-31	12.9
2000-03-31	6.1
2000-06-30	17.7
2000-09-30	11.5
2000-12-31	-2.8
2001-03-31	18.3
2001-06-30	14.2
2001-09-30	17.2
2001-12-31	24.2
2002-03-31	19.8
2002-06-30	18.6
2002-09-30	21.9
2002-12-31	38.7
2003-03-31	26.5
2003-06-30	19.3
2003-09-30	-3
2003-12-31	-13.1
2004-03-31	-34
2004-06-30	-39.9
2004-09-30	-19
2004-12-31	-23
2005-03-31	3.2
2005-06-30	14.6
2005-09-30	-7.1
2005-12-31	-1.7
2006-03-31	-1.8
2006-06-30	6.7
2006-09-30	38.7
2006-12-31	30.6
2007-03-31	31.3
2007-06-30	22.1
2007-09-30	-2.1
2007-12-31	1.2
2008-03-31	5.1
2008-06-30	2.6
2008-09-30	6.1
2008-12-31	17.5
2009-03-31	12.8
2009-06-30	10.3
2009-09-30	3.7
2009-12-31	-6
2010-03-31	-13.7
2010-06-30	-11.1
2010-09-30	-7.9
2010-12-31	-2.7
2011-03-31	11.7
2011-06-30	10.4
2011-09-30	12.8
2011-12-31	14.2
2012-03-31	1.5
2012-06-30	-2.8
2012-09-30	-3.2
2012-12-31	-13
2013-03-31	-9.5
2013-06-30	-10.4
2013-09-30	-11
2013-12-31	-0.7
2014-03-31	-7.6
2014-06-30	-2.1
2014-09-30	-5.7
2014-12-31	-10.2
2015-03-31	1.3
2015-06-30	1.1
2015-09-30	5.1
2015-12-31	4.6
2016-03-31	-3
2016-06-30	-5.4
2016-09-30	-3.6
2016-12-31	-11.8
2017-03-31	-10.9
2017-06-30	-5.6
2017-09-30	-5.7
2017-12-31	2.5
2018-03-31	7.9
2018-06-30	4
2018-09-30	3.6
2018-12-31	6.2
2019-03-31	5.3
2019-06-30	10.6
2019-09-30	13.3
2019-12-31	10.3
2020-03-31	30
2020-06-30	32.3
2020-09-30	27.4
2020-12-31	32.3
2021-03-31	15.1
2021-06-30	7.8
2021-09-30	-1.2
2021-12-31	-8.3
2022-03-31	-10.8
2022-06-30	-10.1
2022-09-30	-0.7
2022-12-31	0.3
2023-03-31	3.3
2023-06-30	2.8
2023-09-30	-1.3
2023-12-31	-3.9