Quarter	Percent
1998-12-31	5.5
1999-03-31	5
1999-06-30	14.4
1999-09-30	13.6
1999-12-31	13.3
2000-03-31	13.9
2000-06-30	35.3
2000-09-30	25.5
2000-12-31	24.6
2001-03-31	20.4
2001-06-30	-2.6
2001-09-30	16.2
2001-12-31	10.5
2002-03-31	13.1
2002-06-30	17
2002-09-30	6.7
2002-12-31	7.3
2003-03-31	10.2
2003-06-30	7.2
2003-09-30	2.5
2003-12-31	2.4
2004-03-31	-0.5
2004-06-30	-1.8
2004-09-30	-1.4
2004-12-31	4.2
2005-03-31	8
2005-06-30	14.4
2005-09-30	14.3
2005-12-31	13.5
2006-03-31	15.7
2006-06-30	11.1
2006-09-30	18.4
2006-12-31	17.5
2007-03-31	10.4
2007-06-30	31.9
2007-09-30	20
2007-12-31	19.6
2008-03-31	20.6
2008-06-30	-2.2
2008-09-30	5.6
2008-12-31	-4.1
2009-03-31	-3.1
2009-06-30	5.9
2009-09-30	2.6
2009-12-31	6.9
2010-03-31	3.5
2010-06-30	-8.2
2010-09-30	-9.4
2010-12-31	-11.8
2011-03-31	-18.1
2011-06-30	-20.7
2011-09-30	-21
2011-12-31	-20.6
2012-03-31	-14
2012-06-30	-10.2
2012-09-30	-9.1
2012-12-31	-6.4
2013-03-31	-2.5
2013-06-30	-3
2013-09-30	-0.9
2013-12-31	-1.8
2014-03-31	-4.9
2014-06-30	-3.6
2014-09-30	-7.4
2014-12-31	-6.1
2015-03-31	-5.7
2015-06-30	-3.3
2015-09-30	-3.3
2015-12-31	-0.2
2016-03-31	0.1
2016-06-30	-5.3
2016-09-30	-4
2016-12-31	0.5
2017-03-31	3.7
2017-06-30	11
2017-09-30	12.4
2017-12-31	6.1
2018-03-31	-0.9
2018-06-30	-7.1
2018-09-30	-8.9
2018-12-31	-7.5
2019-03-31	-1.8
2019-06-30	2.3
2019-09-30	0
2019-12-31	-1.1
2020-03-31	4
2020-06-30	21.7
2020-09-30	33.9
2020-12-31	36.2
2021-03-31	30.7
2021-06-30	11.3
2021-09-30	2.9
2021-12-31	-6.1
2022-03-31	-11.2
2022-06-30	-12.9
2022-09-30	-10.7
2022-12-31	-8.5
2023-03-31	-5.7
2023-06-30	-8.3
2023-09-30	-6.9
2023-12-31	-2.6