Quarter	Percent
1987-12-31	15.9
1988-03-31	-16.1
1988-06-30	-5.2
1988-09-30	-13.4
1988-12-31	17.2
1989-03-31	18.1
1989-06-30	-11.3
1989-09-30	1.6
1989-12-31	-20.7
1990-03-31	-2.6
1990-06-30	2
1990-09-30	8.9
1990-12-31	29.9
1991-03-31	46.2
1991-06-30	41.1
1991-09-30	46.4
1991-12-31	42
1992-03-31	26.1
1992-06-30	29.5
1992-09-30	25.8
1992-12-31	32.5
1993-03-31	56.6
1993-06-30	68.4
1993-09-30	91.8
1993-12-31	89.2
1994-03-31	27
1994-06-30	6.1
1994-09-30	9.8
1994-12-31	-7
1995-03-31	18.2
1995-06-30	37.9
1995-09-30	3
1995-12-31	23.2
1996-03-31	36.6
1996-06-30	36.1
1996-09-30	55.4
1996-12-31	14.6
1997-03-31	30.8
1997-06-30	27.5
1997-09-30	9.3
1997-12-31	31.5
1998-03-31	12.6
1998-06-30	-1.3
1998-09-30	28.1
1998-12-31	-16.9
1999-03-31	7.2
1999-06-30	4.9
1999-09-30	-1.7
1999-12-31	43.4
2000-03-31	17.4
2000-06-30	31.7
2000-09-30	3.8
2000-12-31	11.4
2001-03-31	14.6
2001-06-30	-21.5
2001-09-30	14.3
2001-12-31	0.2
2002-03-31	-17.8
2002-06-30	21.3
2002-09-30	-20.5
2002-12-31	-34.8
2003-03-31	-36.3
2003-06-30	-38.6
2003-09-30	-13.2
2003-12-31	19.6
2004-03-31	23.1
2004-06-30	-3.7
2004-09-30	-11.1
2004-12-31	-11.6
2005-03-31	-28.9
2005-06-30	15.7
2005-09-30	1.6
2005-12-31	-5.7
2006-03-31	12.7
2006-06-30	10.3
2006-09-30	37.6
2006-12-31	9.6
2007-03-31	57.3
2007-06-30	38.8
2007-09-30	18.4
2007-12-31	41.7
2008-03-31	-29.4
2008-06-30	-35.8
2008-09-30	-34.3
2008-12-31	-10.9
2009-03-31	13.6
2009-06-30	-24.8
2009-09-30	-11.1
2009-12-31	-3.5
2010-03-31	12.4
2010-06-30	85.6
2010-09-30	49.9
2010-12-31	4.8
2011-03-31	8.2
2011-06-30	-14.3
2011-09-30	33.4
2011-12-31	35.7
2012-03-31	50.1
2012-06-30	72.5
2012-09-30	-0.4
2012-12-31	-7.7
2013-03-31	-34
2013-06-30	-28.3
2013-09-30	-30.3
2013-12-31	-9.5
2014-03-31	6.7
2014-06-30	26
2014-09-30	28.9
2014-12-31	1.6
2015-03-31	-2.7
2015-06-30	-21.6
2015-09-30	14.2
2015-12-31	15.7
2016-03-31	24.1
2016-06-30	31.5
2016-09-30	-10.5
2016-12-31	-12.2
2017-03-31	-29.1
2017-06-30	-27.3
2017-09-30	-12.5
2017-12-31	7.1
2018-03-31	31.9
2018-06-30	16.6
2018-09-30	-3
2018-12-31	-17.7
2019-03-31	-34.3
2019-06-30	-24.3
2019-09-30	12.9
2019-12-31	37
2020-03-31	74.8
2020-06-30	82.1
2020-09-30	2
2020-12-31	-1.7
2021-03-31	-34.1
2021-06-30	7.3
2021-09-30	7.7
2021-12-31	9.9
2022-03-31	128.4
2022-06-30	-19.4
2022-09-30	55.5
2022-12-31	5.3
2023-03-31	-44.2
2023-06-30	-20
2023-09-30	-25.8
2023-12-31	43.9