Quarter	Percent
1987-12-31	16.7
1988-03-31	23
1988-06-30	27.9
1988-09-30	22.9
1988-12-31	20.6
1989-03-31	14.4
1989-06-30	9.7
1989-09-30	39.6
1989-12-31	33.8
1990-03-31	25.8
1990-06-30	22.9
1990-09-30	2.6
1990-12-31	5.9
1991-03-31	6.6
1991-06-30	4.6
1991-09-30	-1.2
1991-12-31	-8
1992-03-31	-6.9
1992-06-30	-4.6
1992-09-30	-2.2
1992-12-31	-2.4
1993-03-31	-3.5
1993-06-30	-6.3
1993-09-30	-8.4
1993-12-31	-16.9
1994-03-31	-11.9
1994-06-30	-15.7
1994-09-30	-13.3
1994-12-31	-7.4
1995-03-31	-4.8
1995-06-30	-1.2
1995-09-30	2.5
1995-12-31	7.8
1996-03-31	6.8
1996-06-30	5.6
1996-09-30	1.6
1996-12-31	2.8
1997-03-31	-5.4
1997-06-30	4.4
1997-09-30	2.8
1997-12-31	-1.2
1998-03-31	7.5
1998-06-30	6.8
1998-09-30	13
1998-12-31	14
1999-03-31	12
1999-06-30	7.3
1999-09-30	6.2
1999-12-31	-6.1
2000-03-31	-1.8
2000-06-30	1.1
2000-09-30	-0.7
2000-12-31	6.5
2001-03-31	3.9
2001-06-30	-2.5
2001-09-30	-2.6
2001-12-31	-8
2002-03-31	-6.7
2002-06-30	-3.7
2002-09-30	-2.5
2002-12-31	19
2003-03-31	14.1
2003-06-30	15
2003-09-30	11.9
2003-12-31	-0.3
2004-03-31	4.8
2004-06-30	7.3
2004-09-30	6.4
2004-12-31	0.9
2005-03-31	4.1
2005-06-30	12.5
2005-09-30	23.1
2005-12-31	20.6
2006-03-31	16.8
2006-06-30	5.3
2006-09-30	-1.8
2006-12-31	1.2
2007-03-31	-2.8
2007-06-30	8.5
2007-09-30	33.5
2007-12-31	32.4
2008-03-31	37.4
2008-06-30	19.9
2008-09-30	-4
2008-12-31	-3.7
2009-03-31	-2.2
2009-06-30	-4.6
2009-09-30	-6.4
2009-12-31	-7.4
2010-03-31	-12.5
2010-06-30	-10.1
2010-09-30	-8.7
2010-12-31	-5.9
2011-03-31	-3.6
2011-06-30	-9.6
2011-09-30	-7.9
2011-12-31	-11.6
2012-03-31	-12.1
2012-06-30	-6.2
2012-09-30	-7.2
2012-12-31	-7.9
2013-03-31	-8.5
2013-06-30	-10.1
2013-09-30	-7.4
2013-12-31	1.7
2014-03-31	6.5
2014-06-30	9.3
2014-09-30	4.5
2014-12-31	7.3
2015-03-31	4.4
2015-06-30	6.2
2015-09-30	11.7
2015-12-31	9.5
2016-03-31	11.3
2016-06-30	11.7
2016-09-30	8.6
2016-12-31	7.9
2017-03-31	4
2017-06-30	4.2
2017-09-30	9.5
2017-12-31	6.7
2018-03-31	15.5
2018-06-30	13.2
2018-09-30	9.8
2018-12-31	13
2019-03-31	7.8
2019-06-30	6.1
2019-09-30	4.6
2019-12-31	-0.3
2020-03-31	8.8
2020-06-30	17.5
2020-09-30	11.9
2020-12-31	16.1
2021-03-31	9.5
2021-06-30	1.8
2021-09-30	7.7
2021-12-31	11.3
2022-03-31	2.3
2022-06-30	-0.2
2022-09-30	-4.9
2022-12-31	-8.9
2023-03-31	-9.6
2023-06-30	-8
2023-09-30	-4.3
2023-12-31	-5.8