Quarter	Percent
1998-12-31	4.2
1999-03-31	-3.3
1999-06-30	-7.7
1999-09-30	-7.9
1999-12-31	-6.5
2000-03-31	24.6
2000-06-30	141.2
2000-09-30	156.6
2000-12-31	152.5
2001-03-31	76.6
2001-06-30	-20.7
2001-09-30	-38.8
2001-12-31	-37
2002-03-31	-31.7
2002-06-30	-16
2002-09-30	-8
2002-12-31	-18.1
2003-03-31	-10
2003-06-30	-3.5
2003-09-30	6.2
2003-12-31	12.8
2004-03-31	22.7
2004-06-30	8.2
2004-09-30	-2.3
2004-12-31	7.3
2005-03-31	-6.7
2005-06-30	5.8
2005-09-30	10.1
2005-12-31	3.6
2006-03-31	21.9
2006-06-30	26.3
2006-09-30	40.1
2006-12-31	28.4
2007-03-31	29.2
2007-06-30	23
2007-09-30	23.2
2007-12-31	13.5
2008-03-31	-8.7
2008-06-30	-9.6
2008-09-30	27.5
2008-12-31	52.2
2009-03-31	37.3
2009-06-30	52.1
2009-09-30	-3.3
2009-12-31	6
2010-03-31	12.3
2010-06-30	-6
2010-09-30	-7.9
2010-12-31	-14.2
2011-03-31	-20.6
2011-06-30	7.2
2011-09-30	9.6
2011-12-31	-5.8
2012-03-31	4.2
2012-06-30	6.3
2012-09-30	-4.3
2012-12-31	10.8
2013-03-31	8.2
2013-06-30	-7
2013-09-30	-7
2013-12-31	-3.2
2014-03-31	23.4
2014-06-30	-7.8
2014-09-30	-2.9
2014-12-31	-9.4
2015-03-31	-18.7
2015-06-30	4.3
2015-09-30	-8.3
2015-12-31	8.3
2016-03-31	-17.2
2016-06-30	-3.3
2016-09-30	-1.2
2016-12-31	-9
2017-03-31	-0.6
2017-06-30	-11
2017-09-30	0.4
2017-12-31	3
2018-03-31	2.5
2018-06-30	-12.5
2018-09-30	-2
2018-12-31	-17.7
2019-03-31	-0.1
2019-06-30	9.2
2019-09-30	7.7
2019-12-31	24.6
2020-03-31	4.5
2020-06-30	-4.2
2020-09-30	-3.5
2020-12-31	-3.2
2021-03-31	30
2021-06-30	13.2
2021-09-30	10.7
2021-12-31	14.4
2022-03-31	-14.3
2022-06-30	16.9
2022-09-30	11
2022-12-31	-5.7
2023-03-31	0.5
2023-06-30	-9.5
2023-09-30	-14.6
2023-12-31	-7.5