Quarter	Percent
1991-03-31	9.3
1991-06-30	8.9
1991-09-30	7.8
1991-12-31	7.8
1992-03-31	7.1
1992-06-30	5.6
1992-09-30	4.9
1992-12-31	4.2
1993-03-31	3.6
1993-06-30	3.1
1993-09-30	3.4
1993-12-31	4.2
1994-03-31	5.2
1994-06-30	4.3
1994-09-30	4.3
1994-12-31	4.1
1995-03-31	4.4
1995-06-30	5.1
1995-09-30	5.8
1995-12-31	7.2
1996-03-31	6.9
1996-06-30	7.4
1996-09-30	6.8
1996-12-31	6.6
1997-03-31	7.4
1997-06-30	7.8
1997-09-30	7.8
1997-12-31	8
1998-03-31	6.1
1998-06-30	5.6
1998-09-30	5.9
1998-12-31	5.9
1999-03-31	6.6
1999-06-30	6.5
1999-09-30	5.6
1999-12-31	6.4
2000-03-31	4.9
2000-06-30	5.9
2000-09-30	7.8
2000-12-31	6.5
2001-03-31	7.8
2001-06-30	8
2001-09-30	7.2
2001-12-31	7.7
2002-03-31	7.8
2002-06-30	7.4
2002-09-30	7.4
2002-12-31	7.8
2003-03-31	8.3
2003-06-30	7.7
2003-09-30	7.8
2003-12-31	8.5
2004-03-31	8.1
2004-06-30	9
2004-09-30	9.4
2004-12-31	8.2
2005-03-31	8.7
2005-06-30	9.1
2005-09-30	8.1
2005-12-31	8.6
2006-03-31	9
2006-06-30	8.3
2006-09-30	9.3
2006-12-31	8.9
2007-03-31	8.9
2007-06-30	9.3
2007-09-30	8.3
2007-12-31	8.4
2008-03-31	7.5
2008-06-30	6.2
2008-09-30	4.8
2008-12-31	3.4
2009-03-31	2.7
2009-06-30	1.9
2009-09-30	2.5
2009-12-31	3
2010-03-31	3.6
2010-06-30	3.2
2010-09-30	3.2
2010-12-31	2.5
2011-03-31	1.6
2011-06-30	1.5
2011-09-30	2
2011-12-31	2.5
2012-03-31	3.4
2012-06-30	4.2
2012-09-30	4.7
2012-12-31	4.9
2013-03-31	5.2
2013-06-30	5.5
2013-09-30	4.8
2013-12-31	4.9
2014-03-31	4.4
2014-06-30	4.3
2014-09-30	4.7
2014-12-31	5.2
2015-03-31	4.7
2015-06-30	4.8
2015-09-30	5.3
2015-12-31	5.5
2016-03-31	6.3
2016-06-30	6.5
2016-09-30	7
2016-12-31	6
2017-03-31	5.1
2017-06-30	5.1
2017-09-30	4
2017-12-31	3.8
2018-03-31	3.3
2018-06-30	3.2
2018-09-30	3.1
2018-12-31	3.1
2019-03-31	3.2
2019-06-30	3.1
2019-09-30	3.5
2019-12-31	3.6
2020-03-31	5.7
2020-06-30	11
2020-09-30	11.7
2020-12-31	14.4
2021-03-31	14.6
2021-06-30	10.3
2021-09-30	9.3
2021-12-31	6.6
2022-03-31	4.9
2022-06-30	3.4
2022-09-30	3.5
2022-12-31	2.7
2023-03-31	1.1
2023-06-30	0.2
2023-09-30	-0.7
2023-12-31	-0.2