Quarter	Percent
1987-06-30	27.9
1987-09-30	15.5
1987-12-31	31.1
1988-03-31	-12.8
1988-06-30	22.4
1988-09-30	18.1
1988-12-31	14.6
1989-03-31	-16.8
1989-06-30	17
1989-09-30	18.3
1989-12-31	13.5
1990-03-31	-1.5
1990-06-30	17.6
1990-09-30	21.8
1990-12-31	20.2
1991-03-31	-18.3
1991-06-30	14.6
1991-09-30	9
1991-12-31	14.8
1992-03-31	-15.3
1992-06-30	11.3
1992-09-30	3.7
1992-12-31	8.3
1993-03-31	-15.4
1993-06-30	14.9
1993-09-30	10.4
1993-12-31	26.8
1994-03-31	-18.1
1994-06-30	29
1994-09-30	18.8
1994-12-31	35.5
1995-03-31	-9.6
1995-06-30	28.6
1995-09-30	17.7
1995-12-31	40.2
1996-03-31	-8.7
1996-06-30	32.6
1996-09-30	25.1
1996-12-31	48.1
1997-03-31	-6.3
1997-06-30	27.1
1997-09-30	23.9
1997-12-31	51.3
1998-03-31	-1.2
1998-06-30	34.1
1998-09-30	28.5
1998-12-31	46.8
1999-03-31	-1.5
1999-06-30	26
1999-09-30	20.7
1999-12-31	40
2000-03-31	0.2
2000-06-30	30.7
2000-09-30	20.3
2000-12-31	34.5
2001-03-31	-5.4
2001-06-30	26.8
2001-09-30	15.1
2001-12-31	34.7
2002-03-31	0.4
2002-06-30	23.8
2002-09-30	23.2
2002-12-31	27.8
2003-03-31	2.7
2003-06-30	33.3
2003-09-30	23.7
2003-12-31	25.5
2004-03-31	5.5
2004-06-30	28
2004-09-30	24.8
2004-12-31	26.7
2005-03-31	3.8
2005-06-30	16.2
2005-09-30	11.3
2005-12-31	14.6
2006-03-31	-5.7
2006-06-30	8.9
2006-09-30	1.7
2006-12-31	10.3
2007-03-31	-9.2
2007-06-30	4.5
2007-09-30	7.3
2007-12-31	15.8
2008-03-31	-4.6
2008-06-30	12.6
2008-09-30	11.8
2008-12-31	12.6
2009-03-31	-5.1
2009-06-30	7.6
2009-09-30	3.8
2009-12-31	13.3
2010-03-31	-7.2
2010-06-30	4.4
2010-09-30	5.2
2010-12-31	11
2011-03-31	-9.2
2011-06-30	7.7
2011-09-30	4.6
2011-12-31	6.8
2012-03-31	-10.2
2012-06-30	5.5
2012-09-30	3.2
2012-12-31	11.2
2013-03-31	-7.7
2013-06-30	8.8
2013-09-30	5.6
2013-12-31	13
2014-03-31	-8
2014-06-30	8.5
2014-09-30	6.1
2014-12-31	14.6
2015-03-31	-7.7
2015-06-30	10
2015-09-30	7.7
2015-12-31	16.3
2016-03-31	-2.9
2016-06-30	11.3
2016-09-30	9.9
2016-12-31	17.9
2017-03-31	-3.6
2017-06-30	13.4
2017-09-30	10.2
2017-12-31	15.7
2018-03-31	-1.8
2018-06-30	14.8
2018-09-30	6.1
2018-12-31	9.8
2019-03-31	-5.1
2019-06-30	9.8
2019-09-30	4.5
2019-12-31	9.9
2020-03-31	-21
2020-06-30	-31.3
2020-09-30	1.8
2020-12-31	-11.6
2021-03-31	-26.1
2021-06-30	15.8
2021-09-30	11.5
2021-12-31	13.7
2022-03-31	1.7
2022-06-30	24.1
2022-09-30	10.3
2022-12-31	14.5
2023-03-31	2.9
2023-06-30	21.2
2023-09-30	12.1
2023-12-31	14.9