Quarter	Percent
2000-12-31	57.6
2001-03-31	48.1
2001-06-30	35.1
2001-09-30	27.7
2001-12-31	27.1
2002-03-31	27.6
2002-06-30	30
2002-09-30	26.3
2002-12-31	24.3
2003-03-31	17.6
2003-06-30	-5.4
2003-09-30	-9.3
2003-12-31	-6.8
2004-03-31	3.9
2004-06-30	13.5
2004-09-30	17.8
2004-12-31	21.4
2005-03-31	22.5
2005-06-30	27.6
2005-09-30	29.6
2005-12-31	31.9
2006-03-31	41.6
2006-06-30	38.7
2006-09-30	39.9
2006-12-31	35.3
2007-03-31	35.3
2007-06-30	41.4
2007-09-30	47.9
2007-12-31	37.9
2008-03-31	34.3
2008-06-30	30.9
2008-09-30	57.5
2008-12-31	53.4
2009-03-31	29.5
2009-06-30	36.8
2009-09-30	31.5
2009-12-31	40.1
2010-03-31	26.1
2010-06-30	2.2
2010-09-30	0.6
2010-12-31	-4.3
2011-03-31	-7.7
2011-06-30	1.6
2011-09-30	3
2011-12-31	-1.3
2012-03-31	4.3
2012-06-30	5.6
2012-09-30	1.3
2012-12-31	7.5
2013-03-31	5.2
2013-06-30	-0.5
2013-09-30	-0.8
2013-12-31	0.8
2014-03-31	11.8
2014-06-30	0.5
2014-09-30	3
2014-12-31	0.2
2015-03-31	-4
2015-06-30	5.5
2015-09-30	0.2
2015-12-31	6
2016-03-31	-2.2
2016-06-30	2
2016-09-30	3.6
2016-12-31	1.7
2017-03-31	4.4
2017-06-30	0.3
2017-09-30	3.4
2017-12-31	4.2
2018-03-31	3.6
2018-06-30	-0.9
2018-09-30	2.2
2018-12-31	-2.8
2019-03-31	3.2
2019-06-30	5.4
2019-09-30	5.5
2019-12-31	10.6
2020-03-31	6
2020-06-30	8
2020-09-30	9.3
2020-12-31	12.8
2021-03-31	21
2021-06-30	13.8
2021-09-30	12.6
2021-12-31	10.3
2022-03-31	3.4
2022-06-30	11
2022-09-30	7.7
2022-12-31	0.5
2023-03-31	-1.2
2023-06-30	-5.3
2023-09-30	-7.4
2023-12-31	-4.7