Quarter	Percent
1994-03-31	7.1
1994-06-30	10.3
1994-09-30	12.3
1994-12-31	14.2
1995-03-31	17
1995-06-30	16.9
1995-09-30	14.8
1995-12-31	15.8
1996-03-31	16.1
1996-06-30	17
1996-09-30	20.6
1996-12-31	22.1
1997-03-31	22.9
1997-06-30	21.4
1997-09-30	21
1997-12-31	21.3
1998-03-31	22.8
1998-06-30	24.2
1998-09-30	25.2
1998-12-31	24.1
1999-03-31	24.4
1999-06-30	23.2
1999-09-30	22
1999-12-31	22
2000-03-31	22.1
2000-06-30	23.1
2000-09-30	22.4
2000-12-31	20.5
2001-03-31	19.2
2001-06-30	18.3
2001-09-30	17.4
2001-12-31	17.2
2002-03-31	18.7
2002-06-30	18.2
2002-09-30	20.4
2002-12-31	19.2
2003-03-31	19.9
2003-06-30	22
2003-09-30	22.1
2003-12-31	21.2
2004-03-31	22
2004-06-30	20.7
2004-09-30	21
2004-12-31	21.3
2005-03-31	20.8
2005-06-30	17.8
2005-09-30	14.4
2005-12-31	11.6
2006-03-31	9
2006-06-30	7.5
2006-09-30	5.4
2006-12-31	4.5
2007-03-31	3.7
2007-06-30	2.6
2007-09-30	4
2007-12-31	5.1
2008-03-31	6.4
2008-06-30	8.1
2008-09-30	8.8
2008-12-31	7.8
2009-03-31	7.4
2009-06-30	6
2009-09-30	4.1
2009-12-31	4.2
2010-03-31	4
2010-06-30	3.4
2010-09-30	3.7
2010-12-31	3.1
2011-03-31	2.5
2011-06-30	3.3
2011-09-30	3.3
2011-12-31	2.5
2012-03-31	2.1
2012-06-30	1.6
2012-09-30	1.3
2012-12-31	2.4
2013-03-31	3.5
2013-06-30	5.1
2013-09-30	5.7
2013-12-31	5.9
2014-03-31	5.1
2014-06-30	4.1
2014-09-30	4
2014-12-31	4.5
2015-03-31	4.9
2015-06-30	5.4
2015-09-30	5.7
2015-12-31	5.8
2016-03-31	6.5
2016-06-30	6.5
2016-09-30	6.9
2016-12-31	6.9
2017-03-31	6.7
2017-06-30	7.3
2017-09-30	7.3
2017-12-31	7
2018-03-31	7.4
2018-06-30	7.1
2018-09-30	6.2
2018-12-31	5
2019-03-31	4.4
2019-06-30	4.2
2019-09-30	3.6
2019-12-31	3.2
2020-03-31	-1.7
2020-06-30	-13.7
2020-09-30	-14.1
2020-12-31	-17.9
2021-03-31	-19.5
2021-06-30	-7.4
2021-09-30	-5.2
2021-12-31	0
2022-03-31	8.5
2022-06-30	10.6
2022-09-30	10
2022-12-31	9.5
2023-03-31	10
2023-06-30	9.5
2023-09-30	10.9
2023-12-31	12.4