Month	Percent
1997-07-31	8.3
1997-08-31	7.8
1997-09-30	7.8
1997-10-31	8.3
1997-11-30	7.7
1997-12-31	8.3
1998-01-31	8
1998-02-28	7.5
1998-03-31	6
1998-04-30	6.9
1998-05-31	6.6
1998-06-30	5.7
1998-07-31	6.4
1998-08-31	6.2
1998-09-30	5.9
1998-10-31	5.8
1998-11-30	5.6
1998-12-31	6.5
1999-01-31	6.5
1999-02-28	6.2
1999-03-31	6
1999-04-30	6.6
1999-05-31	6.6
1999-06-30	6.6
1999-07-31	6.4
1999-08-31	5.7
1999-09-30	6
1999-10-31	5.8
1999-11-30	6
1999-12-31	6.4
2000-01-31	5
2000-02-29	4.9
2000-03-31	5.8
2000-04-30	5.4
2000-05-31	4.8
2000-06-30	5.1
2000-07-31	4.7
2000-08-31	5.6
2000-09-30	6.4
2000-10-31	5.5
2000-11-30	6.2
2000-12-31	6.2
2001-01-31	6.8
2001-02-28	7.3
2001-03-31	7.8
2001-04-30	7.4
2001-05-31	8
2001-06-30	8.5
2001-07-31	8.5
2001-08-31	8.7
2001-09-30	8.4
2001-10-31	8.9
2001-11-30	9.1
2001-12-31	8.1
2002-01-31	8
2002-02-28	8.2
2002-03-31	8.2
2002-04-30	8
2002-05-31	8.6
2002-06-30	8.3
2002-07-31	8.4
2002-08-31	8.2
2002-09-30	7.8
2002-10-31	8.1
2002-11-30	8.3
2002-12-31	8
2003-01-31	8.7
2003-02-28	8.8
2003-03-31	8.2
2003-04-30	8.9
2003-05-31	8.4
2003-06-30	8
2003-07-31	7.9
2003-08-31	8.1
2003-09-30	8.1
2003-10-31	8.4
2003-11-30	8.2
2003-12-31	8.5
2004-01-31	8.1
2004-02-29	7.8
2004-03-31	8
2004-04-30	8.5
2004-05-31	8.2
2004-06-30	8.2
2004-07-31	9
2004-08-31	8.6
2004-09-30	8.9
2004-10-31	8.9
2004-11-30	8.3
2004-12-31	8.5
2005-01-31	8.3
2005-02-28	8.6
2005-03-31	8.6
2005-04-30	8.5
2005-05-31	8.5
2005-06-30	8.8
2005-07-31	8.6
2005-08-31	8.2
2005-09-30	8.4
2005-10-31	7.4
2005-11-30	7.9
2005-12-31	8
2006-01-31	7.9
2006-02-28	8
2006-03-31	8.3
2006-04-30	8.2
2006-05-31	7.8
2006-06-30	7.9
2006-07-31	7.5
2006-08-31	8
2006-09-30	8.3
2006-10-31	8.3
2006-11-30	8.2
2006-12-31	8.1
2007-01-31	8
2007-02-28	8.1
2007-03-31	8.2
2007-04-30	7.5
2007-05-31	8.2
2007-06-30	8.4
2007-07-31	8.4
2007-08-31	8.4
2007-09-30	8
2007-10-31	8.3
2007-11-30	8.5
2007-12-31	8.5
2008-01-31	8.7
2008-02-29	8.8
2008-03-31	8.5
2008-04-30	8.9
2008-05-31	9.1
2008-06-30	8.1
2008-07-31	7.7
2008-08-31	7.4
2008-09-30	6.7
2008-10-31	6.1
2008-11-30	6
2008-12-31	5.3
2009-01-31	5.2
2009-02-28	4.5
2009-03-31	3.8
2009-04-30	3.2
2009-05-31	2.8
2009-06-30	2.5
2009-07-31	2.8
2009-08-31	2.9
2009-09-30	2.6
2009-10-31	3.1
2009-11-30	2.4
2009-12-31	2.6
2010-01-31	2.8
2010-02-28	3
2010-03-31	3.5
2010-04-30	3.5
2010-05-31	3.1
2010-06-30	3
2010-07-31	2.8
2010-08-31	2.3
2010-09-30	2.7
2010-10-31	2.5
2010-11-30	2.7
2010-12-31	2.7
2011-01-31	2.6
2011-02-28	2.2
2011-03-31	1.9
2011-04-30	2
2011-05-31	1.5
2011-06-30	1.7
2011-07-31	2.2
2011-08-31	2.2
2011-09-30	2.6
2011-10-31	2.5
2011-11-30	2.4
2011-12-31	2.8
2012-01-31	2.9
2012-02-29	3.2
2012-03-31	3.7
2012-04-30	3.2
2012-05-31	3.9
2012-06-30	4.6
2012-07-31	4.3
2012-08-31	5.3
2012-09-30	5
2012-10-31	5
2012-11-30	5.6
2012-12-31	4.9
2013-01-31	4.9
2013-02-28	4.9
2013-03-31	4.8
2013-04-30	4.8
2013-05-31	5.3
2013-06-30	4.9
2013-07-31	4.7
2013-08-31	4.3
2013-09-30	4.1
2013-10-31	4.2
2013-11-30	4.1
2013-12-31	3.9
2014-01-31	4.3
2014-02-28	4.1
2014-03-31	3.5
2014-04-30	3.8
2014-05-31	3.7
2014-06-30	3.4
2014-07-31	3.5
2014-08-31	3.7
2014-09-30	3.7
2014-10-31	4.1
2014-11-30	3.9
2014-12-31	4.2
2015-01-31	3.7
2015-02-28	3.5
2015-03-31	3.3
2015-04-30	3.5
2015-05-31	3.5
2015-06-30	3.4
2015-07-31	3.6
2015-08-31	3.5
2015-09-30	3.5
2015-10-31	3.7
2015-11-30	3.3
2015-12-31	3.8
2016-01-31	4.4
2016-02-29	4.5
2016-03-31	5.4
2016-04-30	6
2016-05-31	5.6
2016-06-30	6.2
2016-07-31	6.7
2016-08-31	6.2
2016-09-30	7.1
2016-10-31	6.4
2016-11-30	6.3
2016-12-31	6.2
2017-01-31	5.2
2017-02-28	5.2
2017-03-31	5
2017-04-30	4.4
2017-05-31	3.7
2017-06-30	3.9
2017-07-31	3
2017-08-31	3.2
2017-09-30	3
2017-10-31	2.7
2017-11-30	2.9
2017-12-31	2.7
2018-01-31	2.8
2018-02-28	2.5
2018-03-31	2.7
2018-04-30	1.8
2018-05-31	2.6
2018-06-30	2.6
2018-07-31	2.4
2018-08-31	2.8
2018-09-30	2.5
2018-10-31	2.5
2018-11-30	2.6
2018-12-31	2.5
2019-01-31	2.6
2019-02-28	3
2019-03-31	2.8
2019-04-30	3.3
2019-05-31	3.7
2019-06-30	3.5
2019-07-31	3.6
2019-08-31	3.7
2019-09-30	3.6
2019-10-31	3.9
2019-11-30	4.2
2019-12-31	3.8
2020-01-31	4.2
2020-02-29	4.3
2020-03-31	4.5
2020-04-30	5.8
2020-05-31	7.2
2020-06-30	7.3
2020-07-31	8.1
2020-08-31	7.7
2020-09-30	7.6
2020-10-31	8.6
2020-11-30	8.9
2020-12-31	10.4
2021-01-31	11.5
2021-02-28	12.2
2021-03-31	12.3
2021-04-30	11.9
2021-05-31	10.1
2021-06-30	10
2021-07-31	9.8
2021-08-31	9.4
2021-09-30	9.8
2021-10-31	9.1
2021-11-30	8.1
2021-12-31	7.2
2022-01-31	5.9
2022-02-28	5
2022-03-31	4.6
2022-04-30	4
2022-05-31	3.6
2022-06-30	3.5
2022-07-31	3.5
2022-08-31	3.4
2022-09-30	3.8
2022-10-31	3.4
2022-11-30	3.8
2022-12-31	3.8
2023-01-31	3.4
2023-02-28	3.1
2023-03-31	2.7
2023-04-30	2.3
2023-05-31	1.8
2023-06-30	2
2023-07-31	1.2
2023-08-31	1.3
2023-09-30	0.8
2023-10-31	0.7
2023-11-30	0.7
2023-12-31	0.9