Quarter	Percent
1998-03-31	13.3
1998-06-30	7.6
1998-09-30	12.4
1998-12-31	-14
1999-03-31	3.3
1999-06-30	0.9
1999-09-30	12.7
1999-12-31	-12
2000-03-31	44.4
2000-06-30	199.3
2000-09-30	44.2
2000-12-31	-18.6
2001-03-31	-11.7
2001-06-30	-25.5
2001-09-30	-10.2
2001-12-31	-15.6
2002-03-31	5
2002-06-30	8.5
2002-09-30	0.3
2002-12-31	-17.5
2003-03-31	15.8
2003-06-30	25.2
2003-09-30	22
2003-12-31	-9.3
2004-03-31	36.2
2004-06-30	6.2
2004-09-30	4.2
2004-12-31	-4.6
2005-03-31	8.9
2005-06-30	27.6
2005-09-30	6.8
2005-12-31	-11.5
2006-03-31	53.7
2006-06-30	15.1
2006-09-30	26.4
2006-12-31	-20.6
2007-03-31	36.3
2007-06-30	26.7
2007-09-30	24.7
2007-12-31	-27.9
2008-03-31	-2.2
2008-06-30	15.2
2008-09-30	123.9
2008-12-31	-20.4
2009-03-31	-21.8
2009-06-30	43.4
2009-09-30	7.7
2009-12-31	2.5
2010-03-31	-12.6
2010-06-30	13.2
2010-09-30	1.2
2010-12-31	-16.1
2011-03-31	-24.6
2011-06-30	66.2
2011-09-30	6.9
2011-12-31	-29.1
2012-03-31	-6.3
2012-06-30	74.6
2012-09-30	-9.4
2012-12-31	-10
2013-03-31	-14
2013-06-30	39.5
2013-09-30	-10.2
2013-12-31	-4.1
2014-03-31	30.2
2014-06-30	-8.9
2014-09-30	-1.2
2014-12-31	-14
2015-03-31	9.4
2015-06-30	33.2
2015-09-30	-19.5
2015-12-31	7.6
2016-03-31	-20.5
2016-06-30	57.2
2016-09-30	-14.2
2016-12-31	0
2017-03-31	-11.8
2017-06-30	33.7
2017-09-30	-3
2017-12-31	3
2018-03-31	-13.9
2018-06-30	12.1
2018-09-30	9.7
2018-12-31	-15.8
2019-03-31	9.6
2019-06-30	21.8
2019-09-30	10.3
2019-12-31	1.8
2020-03-31	-7.8
2020-06-30	31.7
2020-09-30	15.4
2020-12-31	15.6
2021-03-31	22.2
2021-06-30	2.8
2021-09-30	10.6
2021-12-31	6.5
2022-03-31	-5.8
2022-06-30	36.8
2022-09-30	-2.1
2022-12-31	-19.2
2023-03-31	-11.8
2023-06-30	15.3
2023-09-30	-10.7
2023-12-31	-9.1