Quarter	Percent
1998-03-31	45.8
1998-06-30	16.5
1998-09-30	-4.3
1998-12-31	-2.5
1999-03-31	31.8
1999-06-30	9.5
1999-09-30	7.2
1999-12-31	3.7
2000-03-31	38.9
2000-06-30	18.9
2000-09-30	8.8
2000-12-31	-8
2001-03-31	20.5
2001-06-30	26.3
2001-09-30	2.7
2001-12-31	-17.6
2002-03-31	39.3
2002-06-30	12.3
2002-09-30	5.4
2002-12-31	-4.9
2003-03-31	37.1
2003-06-30	3.6
2003-09-30	6.1
2003-12-31	0.4
2004-03-31	21.1
2004-06-30	21
2004-09-30	5.6
2004-12-31	-9.4
2005-03-31	32.1
2005-06-30	36
2005-09-30	0.1
2005-12-31	3.5
2006-03-31	36
2006-06-30	24.9
2006-09-30	12.8
2006-12-31	1
2007-03-31	23.5
2007-06-30	14
2007-09-30	6.4
2007-12-31	-8.3
2008-03-31	5.3
2008-06-30	0.5
2008-09-30	-13.7
2008-12-31	-12
2009-03-31	29.1
2009-06-30	10.4
2009-09-30	-10.2
2009-12-31	4.8
2010-03-31	9.9
2010-06-30	0.7
2010-09-30	7.4
2010-12-31	-4.7
2011-03-31	9.6
2011-06-30	7.5
2011-09-30	-9
2011-12-31	-5.5
2012-03-31	11.4
2012-06-30	7.1
2012-09-30	8
2012-12-31	-9.9
2013-03-31	11.6
2013-06-30	33.7
2013-09-30	-24.3
2013-12-31	8.3
2014-03-31	16.5
2014-06-30	17.5
2014-09-30	0
2014-12-31	-5.8
2015-03-31	28.9
2015-06-30	11.3
2015-09-30	12.3
2015-12-31	-3.8
2016-03-31	35.5
2016-06-30	-3.1
2016-09-30	1.1
2016-12-31	0.8
2017-03-31	12.7
2017-06-30	24.7
2017-09-30	2.6
2017-12-31	2.3
2018-03-31	4.6
2018-06-30	20.7
2018-09-30	2.2
2018-12-31	-1.8
2019-03-31	1.9
2019-06-30	2.2
2019-09-30	2.3
2019-12-31	1.7
2020-03-31	15.1
2020-06-30	35
2020-09-30	19.8
2020-12-31	8.6
2021-03-31	19
2021-06-30	14
2021-09-30	-3.4
2021-12-31	3.1
2022-03-31	23.3
2022-06-30	1.4
2022-09-30	-1.4
2022-12-31	-14.4
2023-03-31	-7.6
2023-06-30	-6.2
2023-09-30	-5.5
2023-12-31	-4.9