Quarter	Percent
1998-12-31	22.4
1999-03-31	3.3
1999-06-30	8.4
1999-09-30	9
1999-12-31	5.4
2000-03-31	7.2
2000-06-30	5.9
2000-09-30	34.1
2000-12-31	19.1
2001-03-31	13.9
2001-06-30	0.6
2001-09-30	-6.7
2001-12-31	-18.3
2002-03-31	-19.1
2002-06-30	-21.5
2002-09-30	-8.2
2002-12-31	-2.6
2003-03-31	5.1
2003-06-30	18.4
2003-09-30	12.9
2003-12-31	30.4
2004-03-31	25.2
2004-06-30	34.1
2004-09-30	34
2004-12-31	13.5
2005-03-31	18.7
2005-06-30	10.8
2005-09-30	-13.8
2005-12-31	16.4
2006-03-31	-10.1
2006-06-30	-7.2
2006-09-30	7.6
2006-12-31	13
2007-03-31	35.8
2007-06-30	28.8
2007-09-30	34.2
2007-12-31	14.8
2008-03-31	16.9
2008-06-30	14.6
2008-09-30	5.4
2008-12-31	-3.4
2009-03-31	-5.5
2009-06-30	-14.1
2009-09-30	-17.3
2009-12-31	-17.5
2010-03-31	-16.9
2010-06-30	2
2010-09-30	-2.9
2010-12-31	-3.2
2011-03-31	-4.5
2011-06-30	-8.3
2011-09-30	16.5
2011-12-31	28.5
2012-03-31	26
2012-06-30	26.9
2012-09-30	-1.7
2012-12-31	-9.1
2013-03-31	13.3
2013-06-30	-0.2
2013-09-30	-3.1
2013-12-31	-15.1
2014-03-31	-41
2014-06-30	-42.4
2014-09-30	-21.5
2014-12-31	-9.8
2015-03-31	34.6
2015-06-30	30.8
2015-09-30	1.6
2015-12-31	-2
2016-03-31	1.7
2016-06-30	29.1
2016-09-30	41.6
2016-12-31	42.9
2017-03-31	18.4
2017-06-30	6.4
2017-09-30	1.3
2017-12-31	-0.2
2018-03-31	-0.7
2018-06-30	1.3
2018-09-30	3.7
2018-12-31	11.4
2019-03-31	12.3
2019-06-30	7.3
2019-09-30	25.3
2019-12-31	7.6
2020-03-31	23.5
2020-06-30	25.8
2020-09-30	-2.1
2020-12-31	13.7
2021-03-31	-18.4
2021-06-30	-18.8
2021-09-30	-7.4
2021-12-31	-15.1
2022-03-31	3.3
2022-06-30	3
2022-09-30	19.1
2022-12-31	-0.6
2023-03-31	-16.1
2023-06-30	-11
2023-09-30	-23.9
2023-12-31	-15.7