Quarter	Percent
1998-09-30	-5.4
1998-12-31	-4.3
1999-03-31	15.6
1999-06-30	9.6
1999-09-30	1.6
1999-12-31	15.2
2000-03-31	2.6
2000-06-30	10.5
2000-09-30	21.5
2000-12-31	7.7
2001-03-31	16.6
2001-06-30	18.8
2001-09-30	14.2
2001-12-31	18.1
2002-03-31	9.9
2002-06-30	0.9
2002-09-30	0.6
2002-12-31	-4.4
2003-03-31	-4.6
2003-06-30	-3.8
2003-09-30	-10.2
2003-12-31	-13.8
2004-03-31	-8.9
2004-06-30	-7
2004-09-30	4
2004-12-31	10.3
2005-03-31	7
2005-06-30	13.3
2005-09-30	15
2005-12-31	13.9
2006-03-31	15.8
2006-06-30	19
2006-09-30	23.3
2006-12-31	25.1
2007-03-31	23.5
2007-06-30	13.2
2007-09-30	17.7
2007-12-31	30
2008-03-31	35.5
2008-06-30	41.3
2008-09-30	35.5
2008-12-31	25.9
2009-03-31	12.2
2009-06-30	-8.4
2009-09-30	-7
2009-12-31	-25.2
2010-03-31	-21.2
2010-06-30	-5.3
2010-09-30	-18
2010-12-31	-4.2
2011-03-31	-10
2011-06-30	-19.6
2011-09-30	-16.7
2011-12-31	-19.3
2012-03-31	-19.1
2012-06-30	-9.7
2012-09-30	-4.6
2012-12-31	0.9
2013-03-31	5
2013-06-30	4.5
2013-09-30	-1.6
2013-12-31	-2
2014-03-31	3.4
2014-06-30	2.1
2014-09-30	6.5
2014-12-31	13.6
2015-03-31	10.2
2015-06-30	12.9
2015-09-30	14.6
2015-12-31	8
2016-03-31	8.6
2016-06-30	14.2
2016-09-30	14.4
2016-12-31	21.2
2017-03-31	22.9
2017-06-30	15.1
2017-09-30	2.2
2017-12-31	-1.1
2018-03-31	-9.1
2018-06-30	-4.6
2018-09-30	10.1
2018-12-31	3.4
2019-03-31	6.8
2019-06-30	4.5
2019-09-30	-1.3
2019-12-31	-4.8
2020-03-31	-0.5
2020-06-30	-2
2020-09-30	-5.9
2020-12-31	1.8