date,value
1989-07-01,35.7
1989-10-01,35.7
1990-01-01,36.0
1990-04-01,36.1
1990-07-01,36.6
1990-10-01,36.3
1991-01-01,36.2
1991-04-01,36.4
1991-07-01,36.5
1991-10-01,36.2
1992-01-01,36.4
1992-04-01,36.6
1992-07-01,36.7
1992-10-01,36.3
1993-01-01,36.0
1993-04-01,36.1
1993-07-01,36.0
1993-10-01,35.8
1994-01-01,35.9
1994-04-01,35.9
1994-07-01,35.9
1994-10-01,35.7
1995-01-01,35.5
1995-04-01,35.5
1995-07-01,35.1
1995-10-01,34.9
1996-01-01,35.0
1996-04-01,35.1
1996-07-01,35.2
1996-10-01,35.0
1997-01-01,35.1
1997-04-01,34.7
1997-07-01,34.5
1997-10-01,34.3
1998-01-01,33.8
1998-04-01,33.8
1998-07-01,34.3
1998-10-01,33.6
1999-01-01,33.7
1999-04-01,33.5
1999-07-01,33.8
1999-10-01,32.9
2000-01-01,33.1
2000-04-01,33.5
2000-07-01,33.6
2000-10-01,34.3
2001-01-01,35.1
2001-04-01,35.0
2001-07-01,35.6
2001-10-01,35.3
2002-01-01,35.4
2002-04-01,35.6
2002-07-01,36.1
2002-10-01,36.1
2003-01-01,36.2
2003-04-01,35.6
2003-07-01,35.3
2003-10-01,34.9
2004-01-01,34.4
2004-04-01,34.4
2004-07-01,34.2
2004-10-01,33.9
2005-01-01,33.9
2005-04-01,33.6
2005-07-01,33.3
2005-10-01,33.3
2006-01-01,32.6
2006-04-01,32.6
2006-07-01,32.4
2006-10-01,32.1
2007-01-01,31.7
2007-04-01,31.3
2007-07-01,31.1
2007-10-01,31.2
2008-01-01,31.4
2008-04-01,31.4
2008-07-01,31.8
2008-10-01,32.6
2009-01-01,32.9
2009-04-01,32.5
2009-07-01,31.9
2009-10-01,31.8
2010-01-01,31.6
2010-04-01,31.6
2010-07-01,31.0
2010-10-01,30.7
2011-01-01,30.5
2011-04-01,30.5
2011-07-01,31.0
2011-10-01,30.8
2012-01-01,30.4
2012-04-01,30.4
2012-07-01,30.3
2012-10-01,30.5
2013-01-01,30.3
2013-04-01,30.3
2013-07-01,30.3
2013-10-01,30.1
2014-01-01,29.8
2014-04-01,29.5
2014-07-01,29.5
2014-10-01,29.2
2015-01-01,29.1
2015-04-01,29.0
2015-07-01,29.2
2015-10-01,29.1
2016-01-01,29.1
2016-04-01,28.9
2016-07-01,28.8
2016-10-01,29.0
2017-01-01,28.9
2017-04-01,28.7
2017-07-01,28.7
2017-10-01,28.6
2018-01-01,28.7
2018-04-01,28.6
2018-07-01,28.5
2018-10-01,28.9
2019-01-01,28.3
2019-04-01,28.4
2019-07-01,28.4
2019-10-01,28.4
2020-01-01,29.8
2020-04-01,29.4
2020-07-01,29.5
2020-10-01,29.2
2021-01-01,29.3
2021-04-01,29.3
2021-07-01,29.6
2021-10-01,29.6
2022-01-01,30.3
2022-04-01,31.4
2022-07-01,31.6
2022-10-01,31.2
2023-01-01,30.9
2023-04-01,31.0
2023-07-01,31.2
2023-10-01,30.7
2024-01-01,30.6
2024-04-01,30.7
2024-07-01,30.3
2024-10-01,30.2
2025-01-01,30.3
2025-04-01,30.1
2025-07-01,29.5
2025-10-01,29.3
2026-01-01,29.5
2026-04-01,28.8