Quarter	Percent
1976-06-30	-100
1976-09-30	-100
1976-12-31	0
1977-03-31	0
1977-06-30	0
1977-09-30	0
1977-12-31	-100
1978-03-31	-100
1978-06-30	-100
1978-09-30	-100
1978-12-31	-100
1979-03-31	-100
1979-06-30	-100
1979-09-30	-100
1979-12-31	-100
1980-03-31	-100
1980-06-30	50
1980-09-30	66.7
1980-12-31	83.3
1981-03-31	37.5
1981-06-30	33.3
1981-09-30	50
1981-12-31	36.4
1982-03-31	20.9
1982-06-30	16
1982-09-30	0.5
1982-12-31	14.9
1983-03-31	28.5
1983-06-30	38.9
1983-09-30	41.5
1983-12-31	36.8
1984-03-31	36.7
1984-06-30	28
1984-09-30	15.9
1984-12-31	18
1985-03-31	16.9
1985-06-30	17.2
1985-09-30	25
1985-12-31	24.4
1986-03-31	25
1986-06-30	26.3
1986-09-30	27.2
1986-12-31	22.6
1987-03-31	20.3
1987-06-30	18.7
1987-09-30	14.4
1987-12-31	15.2
1988-03-31	15.1
1988-06-30	14
1988-09-30	15.2
1988-12-31	11.2
1989-03-31	8.2
1989-06-30	8.7
1989-09-30	8.6
1989-12-31	8
1990-03-31	14.6
1990-06-30	13.6
1990-09-30	17.2
1990-12-31	24.3
1991-03-31	15.8
1991-06-30	17.4
1991-09-30	14.4
1991-12-31	8.6
1992-03-31	11.1
1992-06-30	8
1992-09-30	3.8
1992-12-31	1.4
1993-03-31	1.6
1993-06-30	2.1
1993-09-30	3.9
1993-12-31	8.1
1994-03-31	7.1
1994-06-30	10.3
1994-09-30	12.3
1994-12-31	14.2
1995-03-31	17
1995-06-30	16.9
1995-09-30	14.8
1995-12-31	15.8
1996-03-31	16.1
1996-06-30	15
1996-09-30	18.6
1996-12-31	18.4
1997-03-31	19.2
1997-06-30	20
1997-09-30	18
1997-12-31	19.4
1998-03-31	19.4
1998-06-30	21
1998-09-30	22.7
1998-12-31	21.5
1999-03-31	23.3
1999-06-30	20.7
1999-09-30	19.7
1999-12-31	17.5
2000-03-31	16.9
2000-06-30	19.7
2000-09-30	18.7
2000-12-31	19.5
2001-03-31	17.5
2001-06-30	16.6
2001-09-30	17.3
2001-12-31	17.8
2002-03-31	21.3
2002-06-30	18.2
2002-09-30	19.7
2002-12-31	16.1
2003-03-31	14.8
2003-06-30	16.3
2003-09-30	15.3
2003-12-31	17.3
2004-03-31	18.5
2004-06-30	20.4
2004-09-30	22.6
2004-12-31	21.9
2005-03-31	22.6
2005-06-30	17.2
2005-09-30	10.9
2005-12-31	5.2
2006-03-31	2.3
2006-06-30	3.9
2006-09-30	5.2
2006-12-31	8
2007-03-31	8
2007-06-30	4.3
2007-09-30	4.7
2007-12-31	6.6
2008-03-31	8.6
2008-06-30	13.7
2008-09-30	16.3
2008-12-31	6.2
2009-03-31	4.2
2009-06-30	1
2009-09-30	-2.6
2009-12-31	4.7
2010-03-31	4.5
2010-06-30	3.6
2010-09-30	3.7
2010-12-31	2.8
2011-03-31	2.5
2011-06-30	3.3
2011-09-30	3.3
2011-12-31	2.5
2012-03-31	2.1
2012-06-30	1.6
2012-09-30	1.3
2012-12-31	2.4
2013-03-31	3.5
2013-06-30	5.1
2013-09-30	5.7
2013-12-31	5.9
2014-03-31	5.1
2014-06-30	4.1
2014-09-30	4
2014-12-31	4.5
2015-03-31	4.9