Quarter	Percent
1998-03-31	14.6
1998-06-30	25.9
1998-09-30	4.1
1998-12-31	20.9
1999-03-31	1.7
1999-06-30	56.1
1999-09-30	3.9
1999-12-31	-7.3
2000-03-31	-10.2
2000-06-30	11
2000-09-30	2.8
2000-12-31	-6.1
2001-03-31	-6.5
2001-06-30	8.3
2001-09-30	1.1
2001-12-31	-10.5
2002-03-31	-18.9
2002-06-30	-13.8
2002-09-30	3.3
2002-12-31	-12.9
2003-03-31	-8.7
2003-06-30	-6.4
2003-09-30	-15.3
2003-12-31	-28.3
2004-03-31	7.9
2004-06-30	-3.5
2004-09-30	-9
2004-12-31	-4.6
2005-03-31	3.1
2005-06-30	32.3
2005-09-30	4.7
2005-12-31	37.8
2006-03-31	-21.2
2006-06-30	7.7
2006-09-30	8.1
2006-12-31	6.5
2007-03-31	-1.1
2007-06-30	25.6
2007-09-30	16.9
2007-12-31	-6.8
2008-03-31	86.1
2008-06-30	-17.2
2008-09-30	5.1
2008-12-31	-10.9
2009-03-31	-5.6
2009-06-30	-26.4
2009-09-30	-40.6
2009-12-31	-22.2
2010-03-31	-4.7
2010-06-30	-18.1
2010-09-30	-2.9
2010-12-31	2.4
2011-03-31	-27.5
2011-06-30	-8.1
2011-09-30	-18.6
2011-12-31	3.2
2012-03-31	-23.3
2012-06-30	21.4
2012-09-30	-18.5
2012-12-31	12.9
2013-03-31	-12
2013-06-30	-5.7
2013-09-30	4.5
2013-12-31	-3.5
2014-03-31	-2.8
2014-06-30	19.2
2014-09-30	24.7
2014-12-31	-0.7
2015-03-31	4.1
2015-06-30	26.8
2015-09-30	-13.2
2015-12-31	-13.6
2016-03-31	5.5
2016-06-30	10.1
2016-09-30	-16.1
2016-12-31	1.7
2017-03-31	-8.7
2017-06-30	81.4
2017-09-30	-2
2017-12-31	0.8
2018-03-31	5.3
2018-06-30	26.4
2018-09-30	8.9
2018-12-31	27.4
2019-03-31	-5.5
2019-06-30	34.5
2019-09-30	-14.4
2019-12-31	-13
2020-03-31	45.8
2020-06-30	-7.5
2020-09-30	-9.1
2020-12-31	-21.7
2021-03-31	-20.3
2021-06-30	-18.5
2021-09-30	12.1
2021-12-31	-3.6
2022-03-31	41.3
2022-06-30	6.2
2022-09-30	19.8
2022-12-31	-8.4
2023-03-31	-19.4
2023-06-30	-3.4
2023-09-30	8.1
2023-12-31	-13.2