Quarter	Percent
1986-06-30	31.8
1986-09-30	39.1
1986-12-31	58.3
1987-03-31	53.6
1987-06-30	51.7
1987-09-30	40.6
1987-12-31	28.9
1988-03-31	37.2
1988-06-30	25
1988-09-30	35.6
1988-12-31	26.5
1989-03-31	16.9
1989-06-30	34.5
1989-09-30	42.6
1989-12-31	195.2
1990-03-31	166.1
1990-06-30	158.6
1990-09-30	124.3
1990-12-31	11.2
1991-03-31	13.3
1991-06-30	9.1
1991-09-30	8.4
1991-12-31	0.5
1992-03-31	-6
1992-06-30	-5.7
1992-09-30	-8.4
1992-12-31	-6.8
1993-03-31	17.2
1993-06-30	13.2
1993-09-30	20.1
1993-12-31	19.1
1994-03-31	3.1
1994-06-30	7
1994-09-30	4.3
1994-12-31	7.8
1995-03-31	5.7
1995-06-30	8.1
1995-09-30	8.1
1995-12-31	5.5
1996-03-31	6.1
1996-06-30	-3.4
1996-09-30	-1
1996-12-31	5
1997-03-31	15
1997-06-30	29.5
1997-09-30	35.9
1997-12-31	36.7
1998-03-31	42.2
1998-06-30	35.9
1998-09-30	29.8
1998-12-31	23.7
1999-03-31	15.1
1999-06-30	-8.4
1999-09-30	-6.4
1999-12-31	-3.8
2000-03-31	2.7
2000-06-30	11
2000-09-30	14.7
2000-12-31	4.2
2001-03-31	1.9
2001-06-30	19.5
2001-09-30	4.9
2001-12-31	-9.9
2002-03-31	-13.1
2002-06-30	-17.6
2002-09-30	-14.1
2002-12-31	9.6
2003-03-31	4.1
2003-06-30	-1.5
2003-09-30	6.6
2003-12-31	-1.5
2004-03-31	3.8
2004-06-30	5.7
2004-09-30	6.2
2004-12-31	14.2
2005-03-31	7.6
2005-06-30	12.7
2005-09-30	1.8
2005-12-31	2
2006-03-31	-2.3
2006-06-30	11.3
2006-09-30	18.3
2006-12-31	17.4
2007-03-31	25.6
2007-06-30	19.6
2007-09-30	17.1
2007-12-31	24.3
2008-03-31	13.9
2008-06-30	3.7
2008-09-30	-1.9
2008-12-31	-6.3
2009-03-31	-14.2
2009-06-30	-0.2
2009-09-30	-15.4
2009-12-31	-22.4
2010-03-31	-34.1
2010-06-30	-26.1
2010-09-30	-19.8
2010-12-31	-15.3
2011-03-31	22.2
2011-06-30	-0.1
2011-09-30	24.1
2011-12-31	-2.5
2012-03-31	14.6
2012-06-30	16.3
2012-09-30	3.8
2012-12-31	46
2013-03-31	36.4
2013-06-30	13.2
2013-09-30	23.8
2013-12-31	-1.1
2014-03-31	-17.7
2014-06-30	-6.3
2014-09-30	-8.1
2014-12-31	-5.2
2015-03-31	7.9
2015-06-30	8.4
2015-09-30	6.4
2015-12-31	9.3
2016-03-31	-3.5
2016-06-30	-4.6
2016-09-30	0.2
2016-12-31	-0.8
2017-03-31	2.1
2017-06-30	4.7
2017-09-30	-13.3
2017-12-31	-6.1
2018-03-31	-3.8
2018-06-30	10.7
2018-09-30	23
2018-12-31	10.7
2019-03-31	10.2
2019-06-30	1.9
2019-09-30	-0.1
2019-12-31	-1
2020-03-31	5.4
2020-06-30	-2.7
2020-09-30	-8.9
2020-12-31	13.2
2021-03-31	-1.4
2021-06-30	4.7
2021-09-30	14
2021-12-31	-1.7
2022-03-31	9
2022-06-30	6.9
2022-09-30	20.6
2022-12-31	10.2
2023-03-31	0.2
2023-06-30	-3.5