date,value
1989-07-01,8.6
1989-10-01,8.7
1990-01-01,8.6
1990-04-01,8.7
1990-07-01,8.4
1990-10-01,8.7
1991-01-01,8.9
1991-04-01,8.8
1991-07-01,8.8
1991-10-01,9.1
1992-01-01,9.0
1992-04-01,8.9
1992-07-01,8.9
1992-10-01,9.2
1993-01-01,9.5
1993-04-01,9.6
1993-07-01,9.8
1993-10-01,10.1
1994-01-01,10.3
1994-04-01,10.4
1994-07-01,10.5
1994-10-01,10.8
1995-01-01,11.0
1995-04-01,11.1
1995-07-01,11.4
1995-10-01,11.5
1996-01-01,11.5
1996-04-01,11.4
1996-07-01,11.3
1996-10-01,11.3
1997-01-01,11.2
1997-04-01,11.3
1997-07-01,11.4
1997-10-01,11.5
1998-01-01,11.7
1998-04-01,11.7
1998-07-01,11.2
1998-10-01,11.5
1999-01-01,11.2
1999-04-01,11.2
1999-07-01,11.0
1999-10-01,11.3
2000-01-01,11.2
2000-04-01,10.8
2000-07-01,10.7
2000-10-01,10.3
2001-01-01,9.9
2001-04-01,9.9
2001-07-01,9.5
2001-10-01,9.6
2002-01-01,9.5
2002-04-01,9.3
2002-07-01,8.9
2002-10-01,8.9
2003-01-01,8.8
2003-04-01,9.1
2003-07-01,9.2
2003-10-01,9.4
2004-01-01,9.9
2004-04-01,9.8
2004-07-01,10.0
2004-10-01,10.2
2005-01-01,10.2
2005-04-01,10.4
2005-07-01,10.5
2005-10-01,10.5
2006-01-01,11.0
2006-04-01,10.9
2006-07-01,11.0
2006-10-01,11.3
2007-01-01,11.5
2007-04-01,11.7
2007-07-01,11.9
2007-10-01,11.9
2008-01-01,11.7
2008-04-01,11.6
2008-07-01,11.2
2008-10-01,10.6
2009-01-01,10.2
2009-04-01,10.2
2009-07-01,10.5
2009-10-01,10.4
2010-01-01,10.6
2010-04-01,10.5
2010-07-01,10.7
2010-10-01,11.0
2011-01-01,11.2
2011-04-01,11.3
2011-07-01,11.1
2011-10-01,11.3
2012-01-01,11.6
2012-04-01,11.6
2012-07-01,11.8
2012-10-01,11.7
2013-01-01,11.9
2013-04-01,11.9
2013-07-01,12.0
2013-10-01,12.1
2014-01-01,12.2
2014-04-01,12.4
2014-07-01,12.4
2014-10-01,12.5
2015-01-01,12.5
2015-04-01,12.6
2015-07-01,12.4
2015-10-01,12.4
2016-01-01,12.4
2016-04-01,12.6
2016-07-01,12.6
2016-10-01,12.5
2017-01-01,12.5
2017-04-01,12.5
2017-07-01,12.5
2017-10-01,12.5
2018-01-01,12.4
2018-04-01,12.3
2018-07-01,12.4
2018-10-01,11.9
2019-01-01,12.3
2019-04-01,12.2
2019-07-01,12.1
2019-10-01,12.4
2020-01-01,11.7
2020-04-01,12.2
2020-07-01,12.5
2020-10-01,13.0
2021-01-01,13.2
2021-04-01,13.5
2021-07-01,13.6
2021-10-01,13.8
2022-01-01,13.6
2022-04-01,13.1
2022-07-01,13.1
2022-10-01,13.3
2023-01-01,13.5
2023-04-01,13.5
2023-07-01,13.4
2023-10-01,13.6
2024-01-01,13.7
2024-04-01,13.7
2024-07-01,13.9
2024-10-01,14.0
2025-01-01,14.0
2025-04-01,14.1
2025-07-01,14.4
2025-10-01,14.6
2026-01-01,14.5
2026-04-01,15.0