Quarter	Percent
1998-12-31	10.7
1999-03-31	8.8
1999-06-30	10.3
1999-09-30	4.5
1999-12-31	13.1
2000-03-31	15.9
2000-06-30	13.8
2000-09-30	19.3
2000-12-31	19.3
2001-03-31	15.4
2001-06-30	14.4
2001-09-30	9.5
2001-12-31	2.4
2002-03-31	0.1
2002-06-30	0.5
2002-09-30	1
2002-12-31	-1.6
2003-03-31	-1.5
2003-06-30	-1.1
2003-09-30	-1
2003-12-31	6.2
2004-03-31	5
2004-06-30	4.4
2004-09-30	12.2
2004-12-31	12.4
2005-03-31	15.4
2005-06-30	15.1
2005-09-30	11
2005-12-31	10.5
2006-03-31	13.1
2006-06-30	28.2
2006-09-30	25.6
2006-12-31	23.3
2007-03-31	14.6
2007-06-30	5.7
2007-09-30	11.3
2007-12-31	5.8
2008-03-31	9.6
2008-06-30	10.4
2008-09-30	7.2
2008-12-31	14
2009-03-31	16.1
2009-06-30	2.2
2009-09-30	-3
2009-12-31	-6.8
2010-03-31	-12
2010-06-30	-4.6
2010-09-30	-4.3
2010-12-31	-3.9
2011-03-31	0
2011-06-30	1.2
2011-09-30	8.2
2011-12-31	13.3
2012-03-31	9.6
2012-06-30	9.6
2012-09-30	3.5
2012-12-31	-2.6
2013-03-31	-1.4
2013-06-30	-4.6
2013-09-30	-3.6
2013-12-31	-1.4
2014-03-31	-7.5
2014-06-30	1.6
2014-09-30	-0.8
2014-12-31	2.8
2015-03-31	13.6
2015-06-30	2.6
2015-09-30	11.6
2015-12-31	10.1
2016-03-31	20.8
2016-06-30	36.1
2016-09-30	31.2
2016-12-31	29.9
2017-03-31	13.8
2017-06-30	4.6
2017-09-30	5.3
2017-12-31	9.4
2018-03-31	5.7
2018-06-30	1.8
2018-09-30	2
2018-12-31	4.4
2019-03-31	5
2019-06-30	6.5
2019-09-30	14.2
2019-12-31	13.1
2020-03-31	23.3
2020-06-30	22.6
2020-09-30	8.5
2020-12-31	8
2021-03-31	-7.3
2021-06-30	-1.9
2021-09-30	-3.7
2021-12-31	-5
2022-03-31	8.7
2022-06-30	0.3
2022-09-30	12.4
2022-12-31	-11.6
2023-03-31	-24.5
2023-06-30	-20.8
2023-09-30	-24.6
2023-12-31	-1.2