Quarter	Percent
2000-12-31	111.8
2001-03-31	100.4
2001-06-30	67.9
2001-09-30	37.7
2001-12-31	107.1
2002-03-31	15.6
2002-06-30	34.5
2002-09-30	24.5
2002-12-31	13.7
2003-03-31	30.7
2003-06-30	52.5
2003-09-30	79.2
2003-12-31	82.7
2004-03-31	56.8
2004-06-30	22.3
2004-09-30	29.4
2004-12-31	21.1
2005-03-31	72.4
2005-06-30	152.6
2005-09-30	24.1
2005-12-31	47
2006-03-31	96.7
2006-06-30	54.1
2006-09-30	49.2
2006-12-31	69.9
2007-03-31	60.4
2007-06-30	79.5
2007-09-30	84.6
2007-12-31	44.6
2008-03-31	50.1
2008-06-30	4.9
2008-09-30	38.7
2008-12-31	48.9
2009-03-31	7.3
2009-06-30	-9.7
2009-09-30	-19.6
2009-12-31	-27.3
2010-03-31	-28
2010-06-30	-12.3
2010-09-30	-11.3
2010-12-31	-7.7
2011-03-31	-3.7
2011-06-30	12.4
2011-09-30	7.4
2011-12-31	-6.1
2012-03-31	-2.3
2012-06-30	-0.7
2012-09-30	-11.3
2012-12-31	-3.1
2013-03-31	17.5
2013-06-30	9.2
2013-09-30	18.3
2013-12-31	6.9
2014-03-31	-9.2
2014-06-30	-1.1
2014-09-30	11.8
2014-12-31	12.2
2015-03-31	4.8
2015-06-30	6.7
2015-09-30	-3.7
2015-12-31	-10.3
2016-03-31	-0.3
2016-06-30	-2.9
2016-09-30	1.6
2016-12-31	15.1
2017-03-31	-2
2017-06-30	8.8
2017-09-30	-7.1
2017-12-31	2.3
2018-03-31	3.7
2018-06-30	-7.7
2018-09-30	9.2
2018-12-31	3.3
2019-03-31	26.7
2019-06-30	17.7
2019-09-30	14.9
2019-12-31	19.1
2020-03-31	7.3
2020-06-30	18.6
2020-09-30	63.5
2020-12-31	43.8
2021-03-31	36.4
2021-06-30	30
2021-09-30	-16
2021-12-31	-13.1
2022-03-31	-19.9
2022-06-30	-15.6
2022-09-30	-5
2022-12-31	-1.9
2023-03-31	5
2023-06-30	13.6
2023-09-30	-2.5
2023-12-31	-13.6