Quarter	Percent
1998-12-31	7.9
1999-03-31	8.5
1999-06-30	5.6
1999-09-30	5.2
1999-12-31	5.8
2000-03-31	7.8
2000-06-30	16.9
2000-09-30	23.5
2000-12-31	25.5
2001-03-31	30.5
2001-06-30	26.1
2001-09-30	23.4
2001-12-31	17.5
2002-03-31	8.7
2002-06-30	7.6
2002-09-30	6.4
2002-12-31	10
2003-03-31	15
2003-06-30	11.6
2003-09-30	8.9
2003-12-31	5.7
2004-03-31	4.1
2004-06-30	3.1
2004-09-30	8.4
2004-12-31	14.8
2005-03-31	18.2
2005-06-30	24.2
2005-09-30	19.3
2005-12-31	9.7
2006-03-31	7.5
2006-06-30	1.7
2006-09-30	12.3
2006-12-31	8.2
2007-03-31	6.9
2007-06-30	16.9
2007-09-30	15.6
2007-12-31	30.8
2008-03-31	33.5
2008-06-30	25.9
2008-09-30	16
2008-12-31	12.4
2009-03-31	3.2
2009-06-30	-3.5
2009-09-30	-7.7
2009-12-31	-14.1
2010-03-31	-16.6
2010-06-30	-12.7
2010-09-30	-13.3
2010-12-31	-6.2
2011-03-31	-5.9
2011-06-30	-7.2
2011-09-30	-4.9
2011-12-31	-5.2
2012-03-31	-5
2012-06-30	-4.1
2012-09-30	-4.8
2012-12-31	-6.3
2013-03-31	-5.3
2013-06-30	-6.8
2013-09-30	-5.7
2013-12-31	-7.9
2014-03-31	-7.7
2014-06-30	-7.1
2014-09-30	-5.7
2014-12-31	-7.2
2015-03-31	-6.4
2015-06-30	-4.8
2015-09-30	-6.5
2015-12-31	-6.7
2016-03-31	-4.7
2016-06-30	-3.3
2016-09-30	-1.6
2016-12-31	2.7
2017-03-31	3.5
2017-06-30	1.9
2017-09-30	1.3
2017-12-31	0.4
2018-03-31	-0.3
2018-06-30	-0.6
2018-09-30	-3.1
2018-12-31	-3.2
2019-03-31	-2.7
2019-06-30	-1.2
2019-09-30	0.7
2019-12-31	0.5
2020-03-31	8.2
2020-06-30	20.2
2020-09-30	19.8
2020-12-31	21.4
2021-03-31	9
2021-06-30	-4.3
2021-09-30	-7
2021-12-31	-6.2
2022-03-31	-3.7
2022-06-30	-4.6
2022-09-30	-3.8
2022-12-31	-6.3
2023-03-31	-8.6
2023-06-30	-5.7
2023-09-30	-4.3
2023-12-31	-2