Quarter	Percent
1987-03-31	4.9
1987-06-30	1.1
1987-09-30	34
1987-12-31	11.3
1988-03-31	45.7
1988-06-30	5.3
1988-09-30	6.2
1988-12-31	8.6
1989-03-31	4.1
1989-06-30	10.4
1989-09-30	-2.5
1989-12-31	3.7
1990-03-31	7.9
1990-06-30	1.4
1990-09-30	-4.4
1990-12-31	-23.4
1991-03-31	-0.2
1991-06-30	-4.7
1991-09-30	10
1991-12-31	3.8
1992-03-31	9.9
1992-06-30	2.8
1992-09-30	5.7
1992-12-31	4.6
1993-03-31	7.1
1993-06-30	0.7
1993-09-30	3.1
1993-12-31	5.2
1994-03-31	1.8
1994-06-30	-0.5
1994-09-30	-1.1
1994-12-31	0.9
1995-03-31	2.3
1995-06-30	-0.1
1995-09-30	11
1995-12-31	-15.9
1996-03-31	1.6
1996-06-30	-2.1
1996-09-30	-4.2
1996-12-31	-1.6
1997-03-31	-2.6
1997-06-30	8.7
1997-09-30	-22.1
1997-12-31	23.3
1998-03-31	-15.1
1998-06-30	8.1
1998-09-30	0.1
1998-12-31	-0.4
1999-03-31	2.2
1999-06-30	18.4
1999-09-30	-10.3
1999-12-31	0.7
2000-03-31	14.5
2000-06-30	5.1
2000-09-30	13.2
2000-12-31	8.5
2001-03-31	6.6
2001-06-30	11.9
2001-09-30	-2.8
2001-12-31	1.6
2002-03-31	3.8
2002-06-30	7.3
2002-09-30	-2.6
2002-12-31	2.4
2003-03-31	0.6
2003-06-30	0.2
2003-09-30	6.6
2003-12-31	-2.5
2004-03-31	1
2004-06-30	-0.8
2004-09-30	29.6
2004-12-31	-2.3
2005-03-31	7.6
2005-06-30	-3.7
2005-09-30	-0.6
2005-12-31	10.7
2006-03-31	-1.7
2006-06-30	3.9
2006-09-30	0.2
2006-12-31	-0.1
2007-03-31	1.1
2007-06-30	0.5
2007-09-30	-3.5
2007-12-31	20.8
2008-03-31	14.5
2008-06-30	7
2008-09-30	1.1
2008-12-31	-5.7
2009-03-31	5.5
2009-06-30	-7.9
2009-09-30	-6.9
2009-12-31	-6
2010-03-31	8.2
2010-06-30	-5.8
2010-09-30	-0.6
2010-12-31	5.6
2011-03-31	-2.5
2011-06-30	0.1
2011-09-30	-5.1
2011-12-31	-3.5
2012-03-31	-10.9
2012-06-30	-6.2
2012-09-30	5.9
2012-12-31	16.8
2013-03-31	21.3
2013-06-30	-26
2013-09-30	28.6
2013-12-31	-0.3
2014-03-31	-8.8
2014-06-30	-8
2014-09-30	-8.2
2014-12-31	-32.9
2015-03-31	0.9
2015-06-30	1.5
2015-09-30	3.7
2015-12-31	2
2016-03-31	11.5
2016-06-30	-22.7
2016-09-30	5.2
2016-12-31	10.4
2017-03-31	-7
2017-06-30	5.7
2017-09-30	6.3
2017-12-31	-20.4
2018-03-31	2.9
2018-06-30	-5
2018-09-30	43.6
2018-12-31	-26.2
2019-03-31	1.2
2019-06-30	-4.5
2019-09-30	1.6
2019-12-31	-2.7