Quarter	Percent
1976-06-30	-8
1976-09-30	-5.2
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	23.2
1978-12-31	23
1979-03-31	24.7
1979-06-30	26.3
1979-09-30	29.3
1979-12-31	26.7
1980-03-31	22.5
1980-06-30	18.7
1980-09-30	19.1
1980-12-31	19.9
1981-03-31	23.9
1981-06-30	25.2
1981-09-30	28.1
1981-12-31	30.4
1982-03-31	28.1
1982-06-30	24.6
1982-09-30	22.9
1982-12-31	23
1983-03-31	22.5
1983-06-30	23.4
1983-09-30	22
1983-12-31	20.3
1984-03-31	19.4
1984-06-30	19.7
1984-09-30	18.2
1984-12-31	15.7
1985-03-31	17.2
1985-06-30	14.9
1985-09-30	15.2
1985-12-31	15.1
1986-03-31	14.6
1986-06-30	15.6
1986-09-30	16.3
1986-12-31	15.8
1987-03-31	17.3
1987-06-30	19.1
1987-09-30	19.8
1987-12-31	22.9
1988-03-31	25.1
1988-06-30	24.7
1988-09-30	25.9
1988-12-31	23.7
1989-03-31	23.3
1989-06-30	22.5
1989-09-30	19.7
1989-12-31	19.4
1990-03-31	14.6
1990-06-30	11.4
1990-09-30	8.6
1990-12-31	6.7
1991-03-31	6.9
1991-06-30	5.3
1991-09-30	5.3
1991-12-31	4.9
1992-03-31	3.6
1992-06-30	2
1992-09-30	2.5
1992-12-31	1.7
1993-03-31	1.4
1993-06-30	0.4
1993-09-30	2
1993-12-31	0.3
1994-03-31	1.9
1994-06-30	3.8
1994-09-30	5.2
1994-12-31	7.3
1995-03-31	9
1995-06-30	9.1
1995-09-30	10.1
1995-12-31	11.7
1996-03-31	12.1
1996-06-30	13.2
1996-09-30	15.2
1996-12-31	15.1
1997-03-31	15.7
1997-06-30	17.7
1997-09-30	14.6
1997-12-31	14.9
1998-03-31	15.8
1998-06-30	14.5
1998-09-30	16.3
1998-12-31	16.8
1999-03-31	16
1999-06-30	15.3
1999-09-30	14.5
1999-12-31	14.1
2000-03-31	14.8
2000-06-30	14.3
2000-09-30	13.7
2000-12-31	14.5
2001-03-31	13.7
2001-06-30	15.1
2001-09-30	16.2
2001-12-31	16.9
2002-03-31	17.6
2002-06-30	17
2002-09-30	17.6
2002-12-31	16.8
2003-03-31	15
2003-06-30	14
2003-09-30	12.3
2003-12-31	11.7
2004-03-31	12.6
2004-06-30	12.8
2004-09-30	13
2004-12-31	13
2005-03-31	12
2005-06-30	11.6
2005-09-30	10.6
2005-12-31	10.2
2006-03-31	9.4
2006-06-30	8.5
2006-09-30	7.6
2006-12-31	6.4
2007-03-31	4.6
2007-06-30	3.9
2007-09-30	3.9
2007-12-31	3.5
2008-03-31	4.3
2008-06-30	3.4
2008-09-30	1.6
2008-12-31	0.6
2009-03-31	-2
2009-06-30	-3.9
2009-09-30	-4.9
2009-12-31	-3.5
2010-03-31	-3.2
2010-06-30	-2.7
2010-09-30	-2.7
2010-12-31	-3.6
2011-03-31	-3.1
2011-06-30	-2.4
2011-09-30	-2
2011-12-31	-3.3
2012-03-31	-3.8
2012-06-30	-4.4
2012-09-30	-3.9
2012-12-31	-2.6
2013-03-31	-0.8
2013-06-30	0.3
2013-09-30	3.2
2013-12-31	3.2
2014-03-31	4.2
2014-06-30	5.8
2014-09-30	5.8
2014-12-31	6.6
2015-03-31	7.5