Quarter	Percent
1998-03-31	32.2
1998-06-30	1.3
1998-09-30	7.3
1998-12-31	-5.6
1999-03-31	35.1
1999-06-30	-9
1999-09-30	5.6
1999-12-31	-3.3
2000-03-31	45.2
2000-06-30	25.8
2000-09-30	31.6
2000-12-31	3.2
2001-03-31	69.9
2001-06-30	9.5
2001-09-30	20.7
2001-12-31	-15.1
2002-03-31	24.4
2002-06-30	5.3
2002-09-30	15.3
2002-12-31	-3.2
2003-03-31	48.8
2003-06-30	-6.5
2003-09-30	4.4
2003-12-31	-14.1
2004-03-31	39.9
2004-06-30	-9.8
2004-09-30	27.4
2004-12-31	8.1
2005-03-31	56.8
2005-06-30	10.3
2005-09-30	8.4
2005-12-31	-22.8
2006-03-31	44.3
2006-06-30	-11.4
2006-09-30	61
2006-12-31	-33.4
2007-03-31	37.7
2007-06-30	26.6
2007-09-30	53.9
2007-12-31	9
2008-03-31	49.6
2008-06-30	0.1
2008-09-30	11.1
2008-12-31	-4.2
2009-03-31	6.3
2009-06-30	-23.3
2009-09-30	-7.3
2009-12-31	-28
2010-03-31	-5.7
2010-06-30	-7.8
2010-09-30	-9.7
2010-12-31	-1.3
2011-03-31	-4.7
2011-06-30	-12.7
2011-09-30	-0.4
2011-12-31	-2.7
2012-03-31	-3.7
2012-06-30	-9.3
2012-09-30	-3.1
2012-12-31	-9
2013-03-31	0.7
2013-06-30	-15.1
2013-09-30	1.7
2013-12-31	-17.3
2014-03-31	1.7
2014-06-30	-13
2014-09-30	7.9
2014-12-31	-22.2
2015-03-31	5.1
2015-06-30	-6.9
2015-09-30	0.7
2015-12-31	-22.9
2016-03-31	14.4
2016-06-30	-1.6
2016-09-30	8.1
2016-12-31	-8.7
2017-03-31	18
2017-06-30	-7.3
2017-09-30	5.3
2017-12-31	-11.9
2018-03-31	14.8
2018-06-30	-8.4
2018-09-30	-4.7
2018-12-31	-12.5
2019-03-31	17.6
2019-06-30	-2.7
2019-09-30	2.9
2019-12-31	-13.2
2020-03-31	58.1
2020-06-30	48.1
2020-09-30	1.4
2020-12-31	-8.5
2021-03-31	2.9
2021-06-30	-12
2021-09-30	-9.7
2021-12-31	-5.5
2022-03-31	14.4
2022-06-30	-15
2022-09-30	-6.7
2022-12-31	-15.3
2023-03-31	3.6
2023-06-30	-3.7
2023-09-30	-0.7
2023-12-31	-7.1