Quarterly Percent
1987-12-31 27.6
1988-03-31 29.4
1988-06-30 38.1
1988-09-30 42.6
1988-12-31 46.8
1989-03-31 49.1
1989-06-30 45.7
1989-09-30 44.4
1989-12-31 38
1990-03-31 29.1
1990-06-30 21.1
1990-09-30 18.1
1990-12-31 15
1991-03-31 10.6
1991-06-30 2.9
1991-09-30 -5.2
1991-12-31 -8.1
1992-03-31 -11.8
1992-06-30 -8.6
1992-09-30 -8.6
1992-12-31 -7.6
1993-03-31 -9.9
1993-06-30 -11.4
1993-09-30 -9.6
1993-12-31 -14.8
1994-03-31 -14.4
1994-06-30 -13.5
1994-09-30 -13.2
1994-12-31 -11.6
1995-03-31 -7.6
1995-06-30 -3.7
1995-09-30 -3.6
1995-12-31 -6.3
1996-03-31 -5.4
1996-06-30 -10.6
1996-09-30 -11.5
1996-12-31 -12.3
1997-03-31 -11.3
1997-06-30 -8.9
1997-09-30 -10.3
1997-12-31 -5.1
1998-03-31 -0.5
1998-06-30 2.3
1998-09-30 10.2
1998-12-31 10.5
1999-03-31 11.6
1999-06-30 6.4
1999-09-30 6.3
1999-12-31 6.6
2000-03-31 12.7
2000-06-30 20.7
2000-09-30 29
2000-12-31 33.4
2001-03-31 32.6
2001-06-30 30.8
2001-09-30 25.6
2001-12-31 19.2
2002-03-31 9.9
2002-06-30 8.5
2002-09-30 7.8
2002-12-31 12.8
2003-03-31 17.3
2003-06-30 14
2003-09-30 9.8
2003-12-31 4.9
2004-03-31 5.3
2004-06-30 3.2
2004-09-30 9.2
2004-12-31 15.5
2005-03-31 16.9
2005-06-30 24.5
2005-09-30 18.4
2005-12-31 9.3
2006-03-31 7.2
2006-06-30 1
2006-09-30 13.1
2006-12-31 8.6
2007-03-31 6.7
2007-06-30 17.3
2007-09-30 14.7
2007-12-31 28.9
2008-03-31 32.8
2008-06-30 26
2008-09-30 17.1
2008-12-31 14.1
2009-03-31 4.5
2009-06-30 -2.8
2009-09-30 -7.2
2009-12-31 -13.7
2010-03-31 -16.3
2010-06-30 -12.3
2010-09-30 -13
2010-12-31 -7
2011-03-31 -7
2011-06-30 -8.2
2011-09-30 -5.1
2011-12-31 -4.5
2012-03-31 -3.9
2012-06-30 -3.1
2012-09-30 -4.7
2012-12-31 -6
2013-03-31 -5.1
2013-06-30 -6.8
2013-09-30 -5.8
2013-12-31 -8
2014-03-31 -7.6
2014-06-30 -7
2014-09-30 -5.6
2014-12-31 -6.9
2015-03-31 -6.2
2015-06-30 -4.9
2015-09-30 -6.6
2015-12-31 -6.8
2016-03-31 -4.7
2016-06-30 -3.2
2016-09-30 -0.9
2016-12-31 3
2017-03-31 3.7
2017-06-30 2.4
2017-09-30 1.6
2017-12-31 0.3
2018-03-31 -0.9
2018-06-30 -1.3
2018-09-30 -3.9
2018-12-31 -3.4
2019-03-31 -2.2
2019-06-30 -0.8
2019-09-30 1
2019-12-31 0.4
2020-03-31 8.5
2020-06-30 21.1
2020-09-30 20.6
2020-12-31 22.3
2021-03-31 9.4
2021-06-30 -4.2
2021-09-30 -7.1
2021-12-31 -6.3
2022-03-31 -4.3
2022-06-30 -5.2
2022-09-30 -4.2
2022-12-31 -7
2023-03-31 -9.2
2023-06-30 -6.5
2023-09-30 -5.1
2023-12-31 -2.3