Quarter	Net Percent
1961-04-01	19
1961-07-01	25
1961-10-01	12
1962-01-01	0
1962-04-01	4
1962-07-01	2
1962-10-01	14
1963-01-01	15
1963-04-01	41
1963-07-01	43
1963-10-01	46
1964-01-01	35
1964-04-01	29
1964-07-01	37
1964-10-01	47
1965-01-01	20
1965-04-01	33
1965-07-01	31
1965-10-01	38
1966-01-01	19
1966-04-01	21
1966-07-01	29
1966-10-01	21
1967-01-01	1
1967-04-01	-9
1967-07-01	-30
1967-10-01	-23
1968-01-01	-13
1968-04-01	-6
1968-07-01	26
1968-10-01	50
1969-01-01	38
1969-04-01	33
1969-07-01	42
1969-10-01	46
1970-01-01	26
1970-04-01	40
1970-07-01	39
1970-10-01	40
1971-01-01	12
1971-04-01	1
1971-07-01	1
1971-10-01	3
1972-01-01	-7
1972-04-01	8
1972-07-01	28
1972-10-01	51
1973-01-01	46
1973-04-01	52
1973-07-01	50
1973-10-01	58
1974-01-01	30
1974-04-01	32
1974-07-01	26
1974-10-01	7
1975-01-01	-31
1975-04-01	-15
1975-07-01	-23
1975-10-01	-6
1976-01-01	4
1976-04-01	10
1976-07-01	5
1976-10-01	31
1977-01-01	18
1977-04-01	-3
1977-07-01	-21
1977-10-01	-33
1978-01-01	-41
1978-04-01	-31
1978-07-01	0
1978-10-01	33
1979-01-01	21
1979-04-01	24
1979-07-01	10
1979-10-01	18
1980-01-01	-9
1980-04-01	-25
1980-07-01	-18
1980-10-01	-9
1981-01-01	-10
1981-04-01	16
1981-07-01	28
1981-10-01	41
1982-01-01	29
1982-04-01	21
1982-07-01	-4
1982-10-01	-28
1983-01-01	-41
1983-04-01	-21
1983-07-01	4
1983-10-01	40
1984-01-01	51
1984-04-01	46
1984-07-01	39
1984-10-01	57
1985-01-01	26
1985-04-01	8
1985-07-01	-4
1985-10-01	-17
1986-01-01	51
1986-04-01	-22
1986-07-01	-2
1987-01-01	-2
1987-04-01	-20
1987-07-01	-11
1987-10-01	-14
1988-01-01	-29
1988-04-01	-37
1988-07-01	-23
1988-10-01	-12
1989-01-01	0
1989-04-01	9
1989-07-01	17
1989-10-01	19
1990-01-01	8
1990-04-01	-3
1990-07-01	-20
1990-10-01	-6
1991-01-01	-39
1991-04-01	-29
1991-07-01	-29
1991-10-01	2
1992-01-01	11
1992-04-01	11
1992-07-01	14
1992-10-01	37
1993-01-01	38
1993-04-01	34
1993-07-01	32
1993-10-01	47
1994-01-01	42
1994-04-01	35
1994-07-01	39
1994-10-01	54
1995-01-01	24
1995-04-01	20
1995-07-01	7
1995-10-01	14
1996-01-01	2
1996-04-01	-6
1996-07-01	-7
1996-10-01	14
1997-01-01	-21
1997-04-01	-26
1997-07-01	-19
1997-10-01	0
1998-01-01	-11
1998-04-01	-34
1998-07-01	-21
1998-10-01	0
1999-01-01	2
1999-04-01	5
1999-07-01	23
1999-10-01	47
2000-01-01	32
2000-04-01	-2
2000-07-01	-4
2000-10-01	27
2001-01-01	9
2001-04-01	10
2001-07-01	5
2001-10-01	27
2002-01-01	14
2002-04-01	18
2002-07-01	23
2002-10-01	32
2003-01-01	9
2003-04-01	14
2003-07-01	18
2003-10-01	31
2004-01-01	16
2004-04-01	12
2004-07-01	17
2004-10-01	19
2005-01-01	9
2005-04-01	-2
2005-07-01	-3
2005-10-01	-7
2006-01-01	-19
2006-04-01	-13
2006-07-01	-2
2006-10-01	3
2007-01-01	-1
2007-04-01	-5
2007-07-01	2
2007-10-01	2
2008-01-01	-12
2008-04-01	-18
2008-07-01	-32
2008-10-01	-36
2009-01-01	-54
2009-04-01	-37
2009-07-01	-19
2009-10-01	13
2010-01-01	0
2010-04-01	-8
2010-07-01	-14
2010-10-01	4
2011-01-01	2
2011-04-01	9
2011-07-01	1
2011-10-01	-3
2012-01-01	-2
2012-04-01	5
2012-07-01	-19
2012-10-01	26
2013-01-01	19