Quarter	Net Percent
1974-04-01	66
1974-07-01	62
1974-10-01	62
1975-01-01	32
1975-04-01	26
1975-07-01	26
1975-10-01	-2
1976-01-01	-18
1976-04-01	-20
1976-07-01	-34
1976-10-01	-46
1977-01-01	-60
1977-04-01	-64
1977-07-01	-60
1977-10-01	-66
1978-01-01	-44
1978-04-01	-42
1978-07-01	-40
1978-10-01	-12
1979-01-01	4
1979-04-01	-16
1979-07-01	32
1979-10-01	60
1980-01-01	78
1980-04-01	82
1980-07-01	86
1980-10-01	78
1981-01-01	74
1981-04-01	66
1981-07-01	62
1981-10-01	54
1982-01-01	30
1982-04-01	0
1982-07-01	-22
1982-10-01	-48
1983-01-01	-24
1983-04-01	-24
1983-07-01	-28
1983-10-01	-12
1984-01-01	-14
1984-04-01	-10
1984-07-01	-42
1984-10-01	-56
1985-01-01	-60
1985-04-01	-64
1985-07-01	-72
1985-10-01	-54
1986-01-01	-42
1986-04-01	-32
1986-07-01	-40
1986-10-01	-16
1987-01-01	-8
1987-04-01	-12
1987-07-01	-10
1987-10-01	14
1988-01-01	40
1988-04-01	56
1988-07-01	24
1988-10-01	38
1989-01-01	44
1989-04-01	24
1989-07-01	18
1989-10-01	2
1990-01-01	4
1990-04-01	-8
1990-07-01	-48
1990-10-01	-38
1991-01-01	-36
1991-04-01	-50
1991-07-01	-52
1991-10-01	-62
1992-01-01	-60
1992-04-01	-40
1992-07-01	-66
1992-10-01	-76
1993-01-01	-60
1993-04-01	-70
1993-07-01	-64
1993-10-01	-46
1994-01-01	-28
1994-04-01	2
1994-07-01	16
1994-10-01	48
1995-01-01	44
1995-04-01	34
1995-07-01	26
1995-10-01	56
1996-01-01	-2
1996-04-01	-6
1996-07-01	-30
1996-10-01	-10
1997-01-01	6
1997-04-01	-24
1997-07-01	-28
1997-10-01	-20
1998-01-01	-20
1998-04-01	-60
1998-07-01	-78
1998-10-01	-66
1999-01-01	-70
1999-04-01	-70
1999-07-01	-44
1999-10-01	-8
2000-01-01	6
2000-04-01	-30
2000-07-01	-34
2000-10-01	-38
2001-01-01	-18
2001-04-01	-22
2001-07-01	-6
2001-10-01	-6
2002-01-01	12
2002-04-01	38
2002-07-01	38
2002-10-01	22
2003-01-01	14
2003-04-01	0
2003-07-01	-16
2003-10-01	-6
2004-01-01	10
2004-04-01	16
2004-07-01	26
2004-10-01	34
2005-01-01	26
2005-04-01	24
2005-07-01	36
2005-10-01	36
2006-01-01	44
2006-04-01	38
2006-07-01	34
2006-10-01	50
2007-01-01	56
2007-04-01	56
2007-07-01	30
2007-10-01	38
2008-01-01	-8
2008-04-01	-26
2008-07-01	-40
2008-10-01	-38
2009-01-01	-68
2009-04-01	-78
2009-07-01	-56
2009-10-01	-62
2010-01-01	-44
2010-04-01	-46
2010-07-01	-40
2010-10-01	-18
2011-01-01	2
2011-04-01	2
2011-07-01	-28
2011-10-01	-30
2012-01-01	-6
2012-04-01	-42
2012-07-01	-34
2012-10-01	-24
2013-01-01	-16
2013-04-01	-32
2013-07-01	-26
2013-10-01	-28
2014-01-01	-18
2014-04-01	-50
2014-07-01	-44
2014-10-01	-16
2015-01-01	-40
2015-04-01	-42
2015-07-01	-32
2015-10-01	-32
2016-01-01	-64
2016-04-01	-54
2016-07-01	-40
2016-10-01	-40
2017-01-01	-44
2017-04-01	-68
2017-07-01	-46
2017-10-01	-52
2018-01-01	-26
2018-04-01	-46
2018-07-01	-58