Quarter	Percent
1998-12-31	2.8
1999-03-31	-11.6
1999-06-30	0
1999-09-30	12.1
1999-12-31	-21.5
2000-03-31	91.8
2000-06-30	65.1
2000-09-30	-21.6
2000-12-31	11.1
2001-03-31	103.6
2001-06-30	-14.7
2001-09-30	106.1
2001-12-31	11.9
2002-03-31	17.9
2002-06-30	-22.5
2002-09-30	80
2002-12-31	-22.2
2003-03-31	22.4
2003-06-30	125.5
2003-09-30	-9
2003-12-31	39.6
2004-03-31	88.1
2004-06-30	58
2004-09-30	26.3
2004-12-31	12.8
2005-03-31	38.7
2005-06-30	111.3
2005-09-30	-30.4
2005-12-31	7
2006-03-31	49.2
2006-06-30	-4.7
2006-09-30	6.8
2006-12-31	15.1
2007-03-31	20.2
2007-06-30	79.9
2007-09-30	42.3
2007-12-31	35.4
2008-03-31	40.4
2008-06-30	-17.5
2008-09-30	115.8
2008-12-31	12.1
2009-03-31	26.6
2009-06-30	15.6
2009-09-30	17.5
2009-12-31	-49.7
2010-03-31	38.1
2010-06-30	-4.4
2010-09-30	-29.1
2010-12-31	-49.7
2011-03-31	57.6
2011-06-30	-9.4
2011-09-30	12.4
2011-12-31	-19.6
2012-03-31	5.5
2012-06-30	15.9
2012-09-30	29.7
2012-12-31	-9.7
2013-03-31	21.5
2013-06-30	4.3
2013-09-30	19.8
2013-12-31	-28.2
2014-03-31	-0.4
2014-06-30	20.1
2014-09-30	-7.9
2014-12-31	-21.1
2015-03-31	21.9
2015-06-30	-6.8
2015-09-30	-4.1
2015-12-31	-17.7
2016-03-31	20.4
2016-06-30	41.5
2016-09-30	0
2016-12-31	-8.3
2017-03-31	77.3
2017-06-30	-8.1
2017-09-30	25.8
2017-12-31	-14.9
2018-03-31	0.6
2018-06-30	4.3
2018-09-30	8.4
2018-12-31	24.3
2019-03-31	-31
2019-06-30	-1.7
2019-09-30	16.1
2019-12-31	-6.2
2020-03-31	93.1
2020-06-30	-22.6
2020-09-30	19.4
2020-12-31	-25.6
2021-03-31	21.2
2021-06-30	4.8
2021-09-30	39.3
2021-12-31	-1.7
2022-03-31	15
2022-06-30	5.8
2022-09-30	14
2022-12-31	-3.6
2023-03-31	8.4
2023-06-30	-5.1
2023-09-30	4.6
2023-12-31	3.3