Quarterly Percent
1987-09-30 31.9
1987-12-31 15.8
1988-03-31 16.5
1988-06-30 15.4
1988-09-30 15.5
1988-12-31 14
1989-03-31 13.8
1989-06-30 13.4
1989-09-30 12.1
1989-12-31 10.8
1990-03-31 10
1990-06-30 8
1990-09-30 6.5
1990-12-31 6.8
1991-03-31 4.6
1991-06-30 3.5
1991-09-30 1.8
1991-12-31 0.5
1992-03-31 0.5
1992-06-30 -0.3
1992-09-30 0
1992-12-31 -1.2
1993-03-31 0.4
1993-06-30 1.9
1993-09-30 4
1993-12-31 6.6
1994-03-31 7
1994-06-30 8.9
1994-09-30 10
1994-12-31 11.5
1995-03-31 13.1
1995-06-30 13
1995-09-30 13.5
1995-12-31 14.4
1996-03-31 14.4
1996-06-30 15.4
1996-09-30 17.1
1996-12-31 17.4
1997-03-31 17.9
1997-06-30 18.4
1997-09-30 15.9
1997-12-31 16.3
1998-03-31 17.3
1998-06-30 16.8
1998-09-30 17.9
1998-12-31 16.9
1999-03-31 16.1
1999-06-30 15.8
1999-09-30 15.2
1999-12-31 15.2
2000-03-31 15.1
2000-06-30 14.8
2000-09-30 13.7
2000-12-31 13.2
2001-03-31 12.4
2001-06-30 13
2001-09-30 13.7
2001-12-31 14.8
2002-03-31 15.9
2002-06-30 15.5
2002-09-30 16.5
2002-12-31 15.8
2003-03-31 15.4
2003-06-30 15.6
2003-09-30 14.7
2003-12-31 13.7
2004-03-31 14.3
2004-06-30 14.1
2004-09-30 14.2
2004-12-31 14.3
2005-03-31 13.9
2005-06-30 12.9
2005-09-30 11.5
2005-12-31 10.1
2006-03-31 8.6
2006-06-30 7.5
2006-09-30 6.6
2006-12-31 6.4
2007-03-31 5.8
2007-06-30 5.7
2007-09-30 6.2
2007-12-31 6.4
2008-03-31 7.2
2008-06-30 7.2
2008-09-30 6.3
2008-12-31 5.1
2009-03-31 4.1
2009-06-30 3.1
2009-09-30 1.5
2009-12-31 1.1
2010-03-31 0.6
2010-06-30 0.3
2010-09-30 0.7
2010-12-31 1.2
2011-03-31 1.2
2011-06-30 1.9
2011-09-30 2.5
2011-12-31 1.9
2012-03-31 2.3
2012-06-30 2.5
2012-09-30 2.9
2012-12-31 4.5
2013-03-31 5.3
2013-06-30 6.2
2013-09-30 7.2
2013-12-31 7.5
2014-03-31 8.2
2014-06-30 8.9
2014-09-30 9.3
2014-12-31 9.7
2015-03-31 10.2
2015-06-30 10.6
2015-09-30 10.9
2015-12-31 11.2
2016-03-31 11.9
2016-06-30 12.3
2016-09-30 12.4
2016-12-31 12.4
2017-03-31 12.2
2017-06-30 12.2
2017-09-30 12.3
2017-12-31 12.1
2018-03-31 11.8
2018-06-30 12
2018-09-30 11.4
2018-12-31 10.6
2019-03-31 10.4
2019-06-30 9.7
2019-09-30 9.5
2019-12-31 9.4
2020-03-31 8
2020-06-30 3.5
2020-09-30 2.8
2020-12-31 1.8
2021-03-31 0.9
2021-06-30 5
2021-09-30 5.3
2021-12-31 6.3
2022-03-31 8.8
2022-06-30 9.5
2022-09-30 9.9
2022-12-31 10
2023-03-31 10.2