Quarter	Net Percent
1974-01-01	57
1974-04-01	44
1974-07-01	16
1974-10-01	-1
1975-01-01	-18
1975-04-01	-10
1975-07-01	-18
1975-10-01	-28
1976-01-01	-27
1976-04-01	-35
1976-07-01	-62
1976-10-01	-75
1977-01-01	-70
1977-04-01	-76
1977-07-01	-60
1977-10-01	-52
1978-01-01	-4
1978-04-01	16
1978-07-01	24
1978-10-01	26
1979-01-01	56
1979-04-01	16
1979-07-01	50
1979-10-01	74
1980-01-01	80
1980-04-01	82
1980-07-01	78
1980-10-01	72
1981-01-01	53
1981-04-01	38
1981-07-01	23
1981-10-01	10
1982-01-01	-27
1982-04-01	-59
1982-07-01	-73
1982-10-01	-70
1983-01-01	-63
1983-04-01	-48
1983-07-01	-30
1983-10-01	-10
1984-01-01	7
1984-04-01	5
1984-07-01	-34
1984-10-01	-55
1985-01-01	-67
1985-04-01	-66
1985-07-01	-70
1985-10-01	-50
1986-01-01	-17
1986-04-01	-16
1986-07-01	-12
1986-10-01	22
1987-01-01	34
1987-04-01	41
1987-07-01	26
1987-10-01	37
1988-01-01	54
1988-04-01	58
1988-07-01	15
1988-10-01	21
1989-01-01	3
1989-04-01	-7
1989-07-01	-13
1989-10-01	-19
1990-01-01	-18
1990-04-01	-32
1990-07-01	-59
1990-10-01	-47
1991-01-01	-47
1991-04-01	-55
1991-07-01	-47
1991-10-01	-55
1992-01-01	-27
1992-04-01	-47
1992-07-01	-68
1992-10-01	-60
1993-01-01	-45
1993-04-01	-46
1993-07-01	-36
1993-10-01	-15
1994-01-01	-3
1994-04-01	19
1994-07-01	37
1994-10-01	59
1995-01-01	55
1995-04-01	39
1995-07-01	24
1995-10-01	23
1996-01-01	-19
1996-04-01	-6
1996-07-01	-41
1996-10-01	-27
1997-01-01	12
1997-04-01	-18
1997-07-01	-17
1997-10-01	-20
1998-01-01	-36
1998-04-01	-53
1998-07-01	-73
1998-10-01	-65
1999-01-01	-72
1999-04-01	-57
1999-07-01	-21
1999-10-01	8
2000-01-01	21
2000-04-01	8
2000-07-01	-2
2000-10-01	-10
2001-01-01	-8
2001-04-01	-11
2001-07-01	1
2001-10-01	-6
2002-01-01	7
2002-04-01	28
2002-07-01	31
2002-10-01	30
2003-01-01	-7
2003-04-01	-26
2003-07-01	-31
2003-10-01	-25
2004-01-01	-17
2004-04-01	8
2004-07-01	16
2004-10-01	26
2005-01-01	1
2005-04-01	-2
2005-07-01	12
2005-10-01	16
2006-01-01	20
2006-04-01	6
2006-07-01	9
2006-10-01	32
2007-01-01	37
2007-04-01	26
2007-07-01	5
2007-10-01	16
2008-01-01	-42
2008-04-01	-43
2008-07-01	-50
2008-10-01	-56
2009-01-01	-69
2009-04-01	-70
2009-07-01	-53
2009-10-01	-42
2010-01-01	-17
2010-04-01	-26
2010-07-01	-36
2010-10-01	-21
2011-01-01	1
2011-04-01	-8
2011-07-01	-33
2011-10-01	-5
2012-01-01	12
2012-04-01	-11
2012-07-01	-17
2012-10-01	-24
2013-01-01	-27
2013-04-01	-21