Quarter	Percent
1998-12-31	43.6
1999-03-31	-13.7
1999-06-30	-14.9
1999-09-30	-22.2
1999-12-31	49.8
2000-03-31	-9.9
2000-06-30	-15.1
2000-09-30	-8.1
2000-12-31	61.3
2001-03-31	-9.6
2001-06-30	83.9
2001-09-30	2.5
2001-12-31	21.5
2002-03-31	-17
2002-06-30	-30.5
2002-09-30	-11.3
2002-12-31	50.5
2003-03-31	-7.1
2003-06-30	-4.3
2003-09-30	-3.8
2003-12-31	73.5
2004-03-31	-14.1
2004-06-30	-7.1
2004-09-30	-17.2
2004-12-31	58.3
2005-03-31	-20.1
2005-06-30	-1.8
2005-09-30	-10.1
2005-12-31	20.8
2006-03-31	-5.4
2006-06-30	39.9
2006-09-30	-7
2006-12-31	38.9
2007-03-31	17.1
2007-06-30	3.3
2007-09-30	2.2
2007-12-31	79.6
2008-03-31	-2.8
2008-06-30	-9.7
2008-09-30	-10.7
2008-12-31	27.3
2009-03-31	-21.2
2009-06-30	-19.9
2009-09-30	-20.6
2009-12-31	111.1
2010-03-31	-20.1
2010-06-30	-4.7
2010-09-30	-20.1
2010-12-31	114.3
2011-03-31	-12.6
2011-06-30	-9.9
2011-09-30	-4.2
2011-12-31	125.9
2012-03-31	-24.7
2012-06-30	-21
2012-09-30	-4.4
2012-12-31	105.4
2013-03-31	-21.4
2013-06-30	-26.8
2013-09-30	-5.1
2013-12-31	120.9
2014-03-31	-21.7
2014-06-30	-10.3
2014-09-30	-4.6
2014-12-31	74.2
2015-03-31	-23.7
2015-06-30	-15.9
2015-09-30	3
2015-12-31	16.4
2016-03-31	6.3
2016-06-30	3.4
2016-09-30	0.4
2016-12-31	87.7
2017-03-31	-12
2017-06-30	-3
2017-09-30	6
2017-12-31	73.6
2018-03-31	-17.7
2018-06-30	-5.3
2018-09-30	-15.3
2018-12-31	73
2019-03-31	-28.7
2019-06-30	-8.7
2019-09-30	-5
2019-12-31	76.1
2020-03-31	-19.4
2020-06-30	27.7
2020-09-30	19.7
2020-12-31	79.2
2021-03-31	-20.4
2021-06-30	-3.8
2021-09-30	0.9
2021-12-31	59.4
2022-03-31	-20.4
2022-06-30	-6
2022-09-30	13.8
2022-12-31	35.8
2023-03-31	-23.9
2023-06-30	-12
2023-09-30	0.7
2023-12-31	15.1