Quarterly Percent
1987-12-31 21.4
1988-03-31 25.1
1988-06-30 25.1
1988-09-30 23.1
1988-12-31 30.3
1989-03-31 32.3
1989-06-30 30.7
1989-09-30 33.7
1989-12-31 32.8
1990-03-31 28.7
1990-06-30 29.7
1990-09-30 24.3
1990-12-31 17.3
1991-03-31 11.6
1991-06-30 4.7
1991-09-30 1.6
1991-12-31 4
1992-03-31 2.9
1992-06-30 2.1
1992-09-30 1.9
1992-12-31 2.7
1993-03-31 0.3
1993-06-30 0.9
1993-09-30 1.2
1993-12-31 -1.2
1994-03-31 -1.7
1994-06-30 -1.4
1994-09-30 -0.8
1994-12-31 2.4
1995-03-31 4.6
1995-06-30 4.8
1995-09-30 7.1
1995-12-31 11.6
1996-03-31 11.3
1996-06-30 12.8
1996-09-30 13.6
1996-12-31 8.1
1997-03-31 13.4
1997-06-30 12.6
1997-09-30 12.2
1997-12-31 8.5
1998-03-31 5.7
1998-06-30 2.9
1998-09-30 -2.4
1998-12-31 -0.5
1999-03-31 -0.3
1999-06-30 3.6
1999-09-30 4.7
1999-12-31 7.3
2000-03-31 16.3
2000-06-30 30.5
2000-09-30 24.1
2000-12-31 36.9
2001-03-31 16.8
2001-06-30 2
2001-09-30 11.9
2001-12-31 2.2
2002-03-31 2.4
2002-06-30 6.9
2002-09-30 10.8
2002-12-31 11.1
2003-03-31 11.7
2003-06-30 12.5
2003-09-30 7.3
2003-12-31 8.1
2004-03-31 30.4
2004-06-30 34.9
2004-09-30 31.6
2004-12-31 35.7
2005-03-31 14.2
2005-06-30 18
2005-09-30 29.2
2005-12-31 27.5
2006-03-31 41.3
2006-06-30 29.8
2006-09-30 22.8
2006-12-31 14.3
2007-03-31 11.3
2007-06-30 13.5
2007-09-30 23.5
2007-12-31 36.6
2008-03-31 42.8
2008-06-30 41.5
2008-09-30 37.8
2008-12-31 28.6
2009-03-31 27.4
2009-06-30 18.1
2009-09-30 3.6
2009-12-31 -2
2010-03-31 -6.3
2010-06-30 -2.1
2010-09-30 -8
2010-12-31 -18.6
2011-03-31 -18.8
2011-06-30 -13.8
2011-09-30 -6.5
2011-12-31 -1
2012-03-31 -6
2012-06-30 -7.6
2012-09-30 -5
2012-12-31 9.7
2013-03-31 6.2
2013-06-30 2
2013-09-30 8.7
2013-12-31 -2.7
2014-03-31 -1.3
2014-06-30 3.8
2014-09-30 -4.9
2014-12-31 -1.3
2015-03-31 6.7
2015-06-30 -2.2
2015-09-30 0.3
2015-12-31 0.5
2016-03-31 0.6
2016-06-30 15.2
2016-09-30 16.4
2016-12-31 23.6
2017-03-31 29
2017-06-30 17.3
2017-09-30 19
2017-12-31 14.1
2018-03-31 -2.2
2018-06-30 -6.5
2018-09-30 -6.9
2018-12-31 0.9
2019-03-31 7.7
2019-06-30 7.9
2019-09-30 14.3
2019-12-31 8.6
2020-03-31 16.9
2020-06-30 22.2
2020-09-30 14.1
2020-12-31 12.1
2021-03-31 -0.4
2021-06-30 1.1
2021-09-30 -3.4
2021-12-31 3.6
2022-03-31 5.3
2022-06-30 1.6
2022-09-30 2.4
2022-12-31 -13.3
2023-03-31 -17.3
2023-06-30 -21.7
2023-09-30 -24
2023-12-31 -14