Quarter	Percent
1998-12-31	1
1999-03-31	11.8
1999-06-30	9.5
1999-09-30	0.4
1999-12-31	17.1
2000-03-31	36.9
2000-06-30	24.3
2000-09-30	40.3
2000-12-31	63
2001-03-31	33.2
2001-06-30	1.4
2001-09-30	-3.6
2001-12-31	-37.6
2002-03-31	-42.1
2002-06-30	-24.9
2002-09-30	-30.9
2002-12-31	-10
2003-03-31	-12.4
2003-06-30	-19.7
2003-09-30	-18.9
2003-12-31	-32.7
2004-03-31	-30.7
2004-06-30	-30.4
2004-09-30	-27.9
2004-12-31	-11.4
2005-03-31	-12.9
2005-06-30	92.8
2005-09-30	108.1
2005-12-31	28.6
2006-03-31	41.9
2006-06-30	-29.8
2006-09-30	-23.3
2006-12-31	49.9
2007-03-31	53
2007-06-30	45
2007-09-30	23.8
2007-12-31	-8.2
2008-03-31	-1.7
2008-06-30	22.7
2008-09-30	42
2008-12-31	41.7
2009-03-31	24.8
2009-06-30	4.3
2009-09-30	-16.9
2009-12-31	-16
2010-03-31	-28.4
2010-06-30	-33.8
2010-09-30	-21.7
2010-12-31	-18.7
2011-03-31	-10.3
2011-06-30	-5.5
2011-09-30	-13.6
2011-12-31	-10.5
2012-03-31	-0.6
2012-06-30	0.8
2012-09-30	10.1
2012-12-31	20.5
2013-03-31	14.9
2013-06-30	7.7
2013-09-30	27.5
2013-12-31	39.7
2014-03-31	45.4
2014-06-30	56.4
2014-09-30	25.2
2014-12-31	10.2
2015-03-31	7.5
2015-06-30	6.5
2015-09-30	4.4
2015-12-31	1.7
2016-03-31	9.7
2016-06-30	7.4
2016-09-30	18
2016-12-31	5.5
2017-03-31	16.1
2017-06-30	22
2017-09-30	12.2
2017-12-31	26
2018-03-31	7.9
2018-06-30	8
2018-09-30	15.2
2018-12-31	15.5
2019-03-31	10.6
2019-06-30	17.7
2019-09-30	16.4
2019-12-31	18.6
2020-03-31	22
2020-06-30	10.3
2020-09-30	10.1
2020-12-31	4.8
2021-03-31	3.3
2021-06-30	48.5
2021-09-30	48.1
2021-12-31	47.1
2022-03-31	46.6
2022-06-30	-6.3
2022-09-30	1.4
2022-12-31	3.6
2023-03-31	-1.1
2023-06-30	10.7
2023-09-30	9.1
2023-12-31	0.3