Quarter	Percent
1998-12-31	-23.2
1999-03-31	-38.9
1999-06-30	-21.2
1999-09-30	72.5
1999-12-31	124.2
2000-03-31	134.7
2000-06-30	179.5
2000-09-30	93.2
2000-12-31	136
2001-03-31	183.1
2001-06-30	90.2
2001-09-30	176.4
2001-12-31	72.7
2002-03-31	49.1
2002-06-30	72.2
2002-09-30	14.9
2002-12-31	31.1
2003-03-31	37.2
2003-06-30	23.6
2003-09-30	29.9
2003-12-31	29.7
2004-03-31	91.1
2004-06-30	84.1
2004-09-30	73.1
2004-12-31	82.9
2005-03-31	27
2005-06-30	19
2005-09-30	22.4
2005-12-31	41.9
2006-03-31	31.6
2006-06-30	35.5
2006-09-30	33
2006-12-31	15.3
2007-03-31	8.9
2007-06-30	32.7
2007-09-30	56.5
2007-12-31	81.6
2008-03-31	105.6
2008-06-30	54.6
2008-09-30	49
2008-12-31	22.9
2009-03-31	-2.3
2009-06-30	3.7
2009-09-30	-15.2
2009-12-31	-1.8
2010-03-31	6.2
2010-06-30	10
2010-09-30	5.7
2010-12-31	-4
2011-03-31	-11
2011-06-30	-6.3
2011-09-30	2.1
2011-12-31	-2.8
2012-03-31	-0.5
2012-06-30	-8.1
2012-09-30	-7
2012-12-31	4.4
2013-03-31	7.1
2013-06-30	2.7
2013-09-30	6.6
2013-12-31	2.1
2014-03-31	-6.1
2014-06-30	4.9
2014-09-30	0.8
2014-12-31	-3.9
2015-03-31	6.4
2015-06-30	-0.9
2015-09-30	-3.1
2015-12-31	1
2016-03-31	2.6
2016-06-30	14.1
2016-09-30	9
2016-12-31	11.7
2017-03-31	17.4
2017-06-30	8.5
2017-09-30	18.8
2017-12-31	19.4
2018-03-31	4
2018-06-30	-3.4
2018-09-30	-1.5
2018-12-31	10.1
2019-03-31	0.6
2019-06-30	1
2019-09-30	5.2
2019-12-31	-4.9
2020-03-31	19.2
2020-06-30	18.4
2020-09-30	12.5
2020-12-31	11.1
2021-03-31	-3.9
2021-06-30	-0.6
2021-09-30	0
2021-12-31	6.3
2022-03-31	7.6
2022-06-30	11.7
2022-09-30	9.7
2022-12-31	-0.8
2023-03-31	0.6
2023-06-30	-1.7
2023-09-30	-3.6
2023-12-31	5.2