Quarterly Percent
1976-06-30 -8
1976-09-30 -5.3
1976-12-31 4.7
1977-03-31 2.1
1977-06-30 5
1977-09-30 8.2
1977-12-31 11.8
1978-03-31 18.4
1978-06-30 22.5
1978-09-30 23.3
1978-12-31 23
1979-03-31 24.8
1979-06-30 26.3
1979-09-30 29.2
1979-12-31 26.8
1980-03-31 22.7
1980-06-30 18.9
1980-09-30 19.2
1980-12-31 20
1981-03-31 24
1981-06-30 25.2
1981-09-30 28.1
1981-12-31 30.4
1982-03-31 27.7
1982-06-30 24.3
1982-09-30 22.6
1982-12-31 22.9
1983-03-31 22.6
1983-06-30 23.6
1983-09-30 22.3
1983-12-31 20.6
1984-03-31 19.7
1984-06-30 19.8
1984-09-30 18.2
1984-12-31 17.6
1985-03-31 18
1985-06-30 16.1
1985-09-30 16.9
1985-12-31 16.9
1986-03-31 16.5
1986-06-30 17.5
1986-09-30 18.3
1986-12-31 17.1
1987-03-31 17.8
1987-06-30 19
1987-09-30 18.6
1987-12-31 21.3
1988-03-31 23
1988-06-30 22.5
1988-09-30 23.7
1988-12-31 21.1
1989-03-31 20.4
1989-06-30 19.8
1989-09-30 17.6
1989-12-31 17.2
1990-03-31 14.6
1990-06-30 11.8
1990-09-30 10.1
1990-12-31 9.9
1991-03-31 8.5
1991-06-30 7.5
1991-09-30 7.1
1991-12-31 5.7
1992-03-31 5.1
1992-06-30 3.2
1992-09-30 2.8
1992-12-31 1.6
1993-03-31 1.4
1993-06-30 1.4
1993-09-30 1.9
1993-12-31 3.4
1994-03-31 3
1994-06-30 5.3
1994-09-30 6.8
1994-12-31 9
1995-03-31 10.9
1995-06-30 11
1995-09-30 11.3
1995-12-31 12.8
1996-03-31 13.1
1996-06-30 13.6
1996-09-30 16.1
1996-12-31 16.1
1997-03-31 16.6
1997-06-30 18.3
1997-09-30 15.5
1997-12-31 16.2
1998-03-31 16.8
1998-06-30 16.3
1998-09-30 18.1
1998-12-31 18.3
1999-03-31 18.1
1999-06-30 16.9
1999-09-30 16
1999-12-31 15.2
2000-03-31 15.5
2000-06-30 16
2000-09-30 15.2
2000-12-31 16.1
2001-03-31 14.9
2001-06-30 15.6
2001-09-30 16.5
2001-12-31 17.2
2002-03-31 18.7
2002-06-30 17.4
2002-09-30 18.3
2002-12-31 16.6
2003-03-31 14.9
2003-06-30 14.8
2003-09-30 13.3
2003-12-31 13.6
2004-03-31 14.5
2004-06-30 15.3
2004-09-30 16.1
2004-12-31 16
2005-03-31 15.5
2005-06-30 13.5
2005-09-30 10.7
2005-12-31 8.5
2006-03-31 7
2006-06-30 6.9
2006-09-30 6.8
2006-12-31 6.9
2007-03-31 5.7
2007-06-30 4
2007-09-30 4.1
2007-12-31 4.5
2008-03-31 5.7
2008-06-30 6.6
2008-09-30 6.2
2008-12-31 2.5
2009-03-31 0
2009-06-30 -2.3
2009-09-30 -4.1
2009-12-31 -0.8
2010-03-31 -0.6
2010-06-30 -0.3
2010-09-30 -0.1
2010-12-31 -0.8
2011-03-31 -0.8
2011-06-30 0
2011-09-30 0.2
2011-12-31 -0.8
2012-03-31 -1.3
2012-06-30 -1.9
2012-09-30 -1.7
2012-12-31 -0.4
2013-03-31 1.1
2013-06-30 2.3
2013-09-30 4.2
2013-12-31 4.2
2014-03-31 4.6
2014-06-30 5.1
2014-09-30 5.1
2014-12-31 5.8
2015-03-31 6.4