Quarterly Percent
1987-12-31 20.2
1988-03-31 17
1988-06-30 16.5
1988-09-30 16.8
1988-12-31 16.1
1989-03-31 21.8
1989-06-30 18.8
1989-09-30 14.5
1989-12-31 23
1990-03-31 13.9
1990-06-30 14.8
1990-09-30 15.4
1990-12-31 8.2
1991-03-31 7.3
1991-06-30 1.2
1991-09-30 -5
1991-12-31 -5.6
1992-03-31 -9.3
1992-06-30 -10.1
1992-09-30 -5.4
1992-12-31 -10.9
1993-03-31 -11.6
1993-06-30 -13.7
1993-09-30 -18
1993-12-31 -13.3
1994-03-31 -6.9
1994-06-30 -0.5
1994-09-30 -2.4
1994-12-31 -4.6
1995-03-31 1.2
1995-06-30 -2.2
1995-09-30 3.7
1995-12-31 0.3
1996-03-31 -4.1
1996-06-30 -2.7
1996-09-30 -3.9
1996-12-31 -6
1997-03-31 -4.6
1997-06-30 -3.2
1997-09-30 -4.6
1997-12-31 0.6
1998-03-31 7.2
1998-06-30 -1.3
1998-09-30 5
1998-12-31 1.9
1999-03-31 -7
1999-06-30 -9.6
1999-09-30 -10.3
1999-12-31 -7.5
2000-03-31 -11.7
2000-06-30 -7.2
2000-09-30 -0.5
2000-12-31 -6.3
2001-03-31 -5.5
2001-06-30 -1.5
2001-09-30 -12.7
2001-12-31 -10.7
2002-03-31 -5.9
2002-06-30 -6.3
2002-09-30 -5
2002-12-31 8
2003-03-31 -0.2
2003-06-30 -8.9
2003-09-30 -17.2
2003-12-31 -21.4
2004-03-31 -15.2
2004-06-30 -2.7
2004-09-30 3.2
2004-12-31 5.8
2005-03-31 2.3
2005-06-30 2.2
2005-09-30 -6.2
2005-12-31 -10.4
2006-03-31 -13.1
2006-06-30 -16.9
2006-09-30 -10.4
2006-12-31 -7.7
2007-03-31 2.4
2007-06-30 -4.4
2007-09-30 -9.4
2007-12-31 -7.3
2008-03-31 -11.3
2008-06-30 -4.8
2008-09-30 1
2008-12-31 1.7
2009-03-31 0.9
2009-06-30 -1.5
2009-09-30 -7.7
2009-12-31 0.5
2010-03-31 -2.4
2010-06-30 -12.9
2010-09-30 -11.8
2010-12-31 -19.8
2011-03-31 -19.9
2011-06-30 -16
2011-09-30 -15.2
2011-12-31 -18.1
2012-03-31 -19.9
2012-06-30 -8.3
2012-09-30 -7.9
2012-12-31 -12.9
2013-03-31 -6.6
2013-06-30 -10.2
2013-09-30 -12.6
2013-12-31 -3.8
2014-03-31 -4
2014-06-30 -5.5
2014-09-30 1.3
2014-12-31 9.1
2015-03-31 14
2015-06-30 27.6
2015-09-30 33.1
2015-12-31 20.7
2016-03-31 11.7
2016-06-30 3.1
2016-09-30 4.2
2016-12-31 8.9
2017-03-31 3.9
2017-06-30 -0.3
2017-09-30 -0.7
2017-12-31 -13.6
2018-03-31 -8.4
2018-06-30 -5
2018-09-30 -12.8
2018-12-31 -4.8
2019-03-31 -10.4
2019-06-30 -1.5
2019-09-30 10
2019-12-31 11.9
2020-03-31 25.6
2020-06-30 14.6
2020-09-30 6.1
2020-12-31 10.8
2021-03-31 -0.3
2021-06-30 -1.7
2021-09-30 -5.4
2021-12-31 -15.6
2022-03-31 -16.3
2022-06-30 -16.9
2022-09-30 -9.2
2022-12-31 -3
2023-03-31 0.5
2023-06-30 1.2
2023-09-30 -8.3
2023-12-31 -13