Quarter	Percent
1987-09-30	31.9
1987-12-31	15.8
1988-03-31	16.5
1988-06-30	15.4
1988-09-30	15.5
1988-12-31	14
1989-03-31	13.8
1989-06-30	13.4
1989-09-30	12.1
1989-12-31	10.8
1990-03-31	10
1990-06-30	8
1990-09-30	6.5
1990-12-31	6.8
1991-03-31	4.6
1991-06-30	3.5
1991-09-30	1.8
1991-12-31	0.5
1992-03-31	0.5
1992-06-30	-0.3
1992-09-30	0
1992-12-31	-1.2
1993-03-31	0.4
1993-06-30	1.7
1993-09-30	3.7
1993-12-31	6.3
1994-03-31	6.4
1994-06-30	8.3
1994-09-30	9.4
1994-12-31	10.9
1995-03-31	12.4
1995-06-30	12.2
1995-09-30	12.8
1995-12-31	13.7
1996-03-31	13.5
1996-06-30	14.6
1996-09-30	16.3
1996-12-31	16.6
1997-03-31	17.2
1997-06-30	17.7
1997-09-30	15.2
1997-12-31	15.7
1998-03-31	16.7
1998-06-30	16.3
1998-09-30	17.5
1998-12-31	16.5
1999-03-31	15.6
1999-06-30	15.3
1999-09-30	14.6
1999-12-31	14.6
2000-03-31	14.5
2000-06-30	14.1
2000-09-30	12.9
2000-12-31	12.4
2001-03-31	11.4
2001-06-30	12.1
2001-09-30	12.8
2001-12-31	14
2002-03-31	15.1
2002-06-30	14.9
2002-09-30	16.1
2002-12-31	15.3
2003-03-31	14.9
2003-06-30	15.2
2003-09-30	14.2
2003-12-31	13.3
2004-03-31	13.9
2004-06-30	13.7
2004-09-30	13.8
2004-12-31	14
2005-03-31	13.7
2005-06-30	12.6
2005-09-30	11
2005-12-31	9.6
2006-03-31	7.8
2006-06-30	6.7
2006-09-30	5.8
2006-12-31	5.6
2007-03-31	4.8
2007-06-30	4.4
2007-09-30	5
2007-12-31	5.2
2008-03-31	5.8
2008-06-30	5.9
2008-09-30	4.9
2008-12-31	3.6
2009-03-31	2.5
2009-06-30	1.1
2009-09-30	-0.7
2009-12-31	-1.1
2010-03-31	-2
2010-06-30	-2.4
2010-09-30	-1.8
2010-12-31	-1.2
2011-03-31	-1.3
2011-06-30	-0.7
2011-09-30	-0.2
2011-12-31	-0.9
2012-03-31	-0.6
2012-06-30	-0.5
2012-09-30	0.1
2012-12-31	1.4
2013-03-31	2.4
2013-06-30	3.2
2013-09-30	4.7
2013-12-31	5
2014-03-31	5.7
2014-06-30	5.9
2014-09-30	6.2
2014-12-31	6.5
2015-03-31	7.1
2015-06-30	7.7
2015-09-30	8.1
2015-12-31	8.6
2016-03-31	9.7
2016-06-30	10.2
2016-09-30	10.3
2016-12-31	10.5
2017-03-31	10.2
2017-06-30	10.2
2017-09-30	10.3
2017-12-31	10.1
2018-03-31	9.5
2018-06-30	9.8
2018-09-30	8.7
2018-12-31	7.6
2019-03-31	7.2
2019-06-30	6.3
2019-09-30	6.1
2019-12-31	6.1
2020-03-31	3.9
2020-06-30	-3.6
2020-09-30	-4.7
2020-12-31	-7.6
2021-03-31	-8.6
2021-06-30	-2
2021-09-30	-1.4
2021-12-31	1.5
2022-03-31	5.1
2022-06-30	6.6
2022-09-30	7.1
2022-12-31	7.2
2023-03-31	7.5
2023-06-30	7.5
2023-09-30	7.9
2023-12-31	8.5