Quarter	Percent
1998-03-31	51.4
1998-06-30	-20.6
1998-09-30	17.3
1998-12-31	-71.9
1999-03-31	107.1
1999-06-30	-21.6
1999-09-30	26
1999-12-31	-20.1
2000-03-31	168.1
2000-06-30	0.7
2000-09-30	-32.4
2000-12-31	28.1
2001-03-31	101
2001-06-30	-48
2001-09-30	-1.4
2001-12-31	25.2
2002-03-31	4.9
2002-06-30	35.2
2002-09-30	-34.3
2002-12-31	-21.6
2003-03-31	36.7
2003-06-30	7.5
2003-09-30	37.3
2003-12-31	37.8
2004-03-31	81.9
2004-06-30	-21.1
2004-09-30	-30
2004-12-31	5.4
2005-03-31	4.3
2005-06-30	7.3
2005-09-30	-30.6
2005-12-31	15.3
2006-03-31	158.5
2006-06-30	-23.7
2006-09-30	-32.5
2006-12-31	42.9
2007-03-31	118.3
2007-06-30	9
2007-09-30	-26.5
2007-12-31	1.4
2008-03-31	-0.4
2008-06-30	-42.4
2008-09-30	-54.3
2008-12-31	-8.4
2009-03-31	-21.8
2009-06-30	-2.9
2009-09-30	-0.3
2009-12-31	44.7
2010-03-31	73.3
2010-06-30	-41.2
2010-09-30	33.4
2010-12-31	-8.3
2011-03-31	40.6
2011-06-30	-30
2011-09-30	8.8
2011-12-31	-49.2
2012-03-31	119.1
2012-06-30	-19.2
2012-09-30	31.4
2012-12-31	-32.9
2013-03-31	47.4
2013-06-30	17.2
2013-09-30	-25.6
2013-12-31	-6.3
2014-03-31	18.5
2014-06-30	26.7
2014-09-30	-33.7
2014-12-31	-19.3
2015-03-31	54.2
2015-06-30	-31.6
2015-09-30	7.3
2015-12-31	-45.2
2016-03-31	3.8
2016-06-30	46.8
2016-09-30	-14.5
2016-12-31	-13.2
2017-03-31	21.2
2017-06-30	-12.7
2017-09-30	-27
2017-12-31	3.6
2018-03-31	36.4
2018-06-30	-24.3
2018-09-30	-42.8
2018-12-31	-14.2
2019-03-31	8
2019-06-30	-7.1
2019-09-30	17.9
2019-12-31	42
2020-03-31	110.4
2020-06-30	-16.4
2020-09-30	-22.3
2020-12-31	33.2
2021-03-31	-36.6
2021-06-30	29.5
2021-09-30	29.2
2021-12-31	37.6
2022-03-31	-17.4
2022-06-30	-20.6
2022-09-30	4.2
2022-12-31	-30.2
2023-03-31	-17.4
2023-06-30	63.5
2023-09-30	22
2023-12-31	161.3