Quarter	Percent
1987-09-30	34.3
1987-12-31	30.1
1988-03-31	27.2
1988-06-30	28.2
1988-09-30	32.5
1988-12-31	25.4
1989-03-31	20.2
1989-06-30	26.5
1989-09-30	25.8
1989-12-31	18
1990-03-31	10.7
1990-06-30	11.2
1990-09-30	11.7
1990-12-31	6.1
1991-03-31	5.1
1991-06-30	6.8
1991-09-30	5.2
1991-12-31	2.1
1992-03-31	0.1
1992-06-30	-0.9
1992-09-30	2
1992-12-31	2.9
1993-03-31	0.8
1993-06-30	3.8
1993-09-30	7.3
1993-12-31	7.3
1994-03-31	6.6
1994-06-30	9.8
1994-09-30	12.5
1994-12-31	12
1995-03-31	11.8
1995-06-30	12
1995-09-30	13.7
1995-12-31	15.3
1996-03-31	13.4
1996-06-30	14
1996-09-30	19.2
1996-12-31	18.4
1997-03-31	14.3
1997-06-30	16.7
1997-09-30	14.8
1997-12-31	12.9
1998-03-31	16.7
1998-06-30	16.6
1998-09-30	14.9
1998-12-31	12.9
1999-03-31	12.9
1999-06-30	14.7
1999-09-30	13.7
1999-12-31	11.8
2000-03-31	12.6
2000-06-30	13
2000-09-30	9.2
2000-12-31	8.1
2001-03-31	10.9
2001-06-30	14.4
2001-09-30	14.2
2001-12-31	13.8
2002-03-31	15.5
2002-06-30	15.5
2002-09-30	15.1
2002-12-31	14.3
2003-03-31	13
2003-06-30	13
2003-09-30	11.8
2003-12-31	9.8
2004-03-31	11.7
2004-06-30	14
2004-09-30	12.1
2004-12-31	9.7
2005-03-31	11
2005-06-30	12.6
2005-09-30	10
2005-12-31	6.9
2006-03-31	7.2
2006-06-30	8.5
2006-09-30	7.6
2006-12-31	6.5
2007-03-31	6.3
2007-06-30	7.9
2007-09-30	8.3
2007-12-31	6.5
2008-03-31	7.1
2008-06-30	7.8
2008-09-30	4.1
2008-12-31	1
2009-03-31	2.1
2009-06-30	3.3
2009-09-30	-0.8
2009-12-31	-3.3
2010-03-31	-0.2
2010-06-30	2.1
2010-09-30	-0.4
2010-12-31	-1.2
2011-03-31	1.8
2011-06-30	3.9
2011-09-30	2.6
2011-12-31	-0.3
2012-03-31	2.2
2012-06-30	6.3
2012-09-30	5
2012-12-31	4.6
2013-03-31	7.3
2013-06-30	9.6
2013-09-30	9.3
2013-12-31	7.5
2014-03-31	9.8
2014-06-30	13.7
2014-09-30	12.1
2014-12-31	9.1
2015-03-31	11.9
2015-06-30	15.8
2015-09-30	13.3
2015-12-31	10.3
2016-03-31	13.4
2016-06-30	17.3
2016-09-30	13.9
2016-12-31	10
2017-03-31	12.8
2017-06-30	16.3
2017-09-30	13.7
2017-12-31	10.2
2018-03-31	11.5
2018-06-30	15.3
2018-09-30	12.9
2018-12-31	8.2
2019-03-31	10.2
2019-06-30	13.7
2019-09-30	11.5
2019-12-31	7.7
2020-03-31	8.4
2020-06-30	6.5
2020-09-30	4.3
2020-12-31	5.9
2021-03-31	5.7
2021-06-30	8.6
2021-09-30	8.7
2021-12-31	5.5
2022-03-31	8.3
2022-06-30	12.6
2022-09-30	10.8
2022-12-31	6.7
2023-03-31	8.8