Quarter	Percent
1971-07-01	5.00
1971-10-01	4.50
1972-01-01	4.50
1972-04-01	6.00
1972-07-01	7.00
1972-10-01	7.50
1973-01-01	9.50
1973-04-01	8.00
1973-07-01	11.00
1973-10-01	13.00
1974-01-01	13.00
1974-04-01	12.00
1974-07-01	12.00
1974-10-01	12.00
1975-01-01	10.89
1975-04-01	9.50
1975-07-01	10.00
1975-10-01	11.00
1976-01-01	9.50
1976-04-01	10.55
1976-07-01	11.39
1976-10-01	14.00
1977-01-01	10.83
1977-04-01	8.50
1977-07-01	7.36
1977-10-01	7.17
1978-01-01	6.50
1978-04-01	9.68
1978-07-01	10.00
1978-10-01	12.50
1979-01-01	13.07
1979-04-01	13.05
1979-07-01	14.00
1979-10-01	17.00
1980-01-01	17.00
1980-04-01	17.00
1980-07-01	16.00
1980-10-01	14.00
1981-01-01	12.66
1981-04-01	12.00
1981-07-01	13.00
1981-10-01	14.57
1982-01-01	13.20
1982-04-01	12.61
1982-07-01	10.50
1982-10-01	10.06
1983-01-01	10.72
1983-04-01	9.73
1983-07-01	9.50
1983-10-01	9.00
1984-01-01	8.74
1984-04-01	9.15
1984-07-01	10.50
1984-10-01	9.56
1985-01-01	13.80
1985-04-01	12.54
1985-07-01	11.50
1985-10-01	11.50
1986-01-01	12.13
1986-04-01	10.00
1986-07-01	10.00
1986-10-01	11.00
1987-01-01	10.42
1987-04-01	9.00
1987-07-01	10.00
1987-10-01	8.57
1988-01-01	8.77
1988-04-01	8.60
1988-07-01	12.00
1988-10-01	13.00
1989-01-01	13.00
1989-04-01	14.00
1989-07-01	14.00
1989-10-01	15.00
1990-01-01	15.00
1990-04-01	15.00
1990-07-01	15.00
1990-10-01	14.00
1991-01-01	12.88
1991-04-01	11.50
1991-07-01	10.55
1991-10-01	10.50
1992-01-01	10.50
1992-04-01	10.00
1992-07-01	9.80
1992-10-01	7.00
1993-01-01	6.00
1993-04-01	6.00
1993-07-01	6.00
1993-10-01	5.50
1994-01-01	5.25
1994-04-01	5.25
1994-07-01	5.59
1994-10-01	6.15
1995-01-01	6.75
1995-04-01	6.75
1995-07-01	6.75
1995-10-01	6.61
1996-01-01	6.06
1996-04-01	5.79
1996-07-01	5.75
1996-10-01	6.00
1997-01-01	6.00
1997-04-01	6.45
1997-07-01	7.00
1997-10-01	7.25
1998-01-01	7.25
1998-04-01	7.47
1998-07-01	7.50
1998-10-01	6.42
1999-01-01	5.50
1999-04-01	5.08
1999-07-01	5.19
1999-10-01	5.50
2000-01-01	6.00
2000-04-01	6.00
2000-07-01	6.00
2000-10-01	6.00
2001-01-01	5.75
2001-04-01	5.25
2001-07-01	4.89
2001-10-01	4.00
2002-01-01	4.00
2002-04-01	4.00
2002-07-01	4.00
2002-10-01	4.00
2003-01-01	3.75
2003-04-01	3.75
2003-07-01	3.50
2003-10-01	3.75
2004-01-01	4.00
2004-04-01	4.42
2004-07-01	4.75
2004-10-01	4.75
2005-01-01	4.75
2005-04-01	4.75
2005-07-01	4.50
2005-10-01	4.50
2006-01-01	4.50
2006-04-01	4.50
2006-07-01	4.75
2006-10-01	5.00
2007-01-01	5.25
2007-04-01	5.50
2007-07-01	5.75
2007-10-01	5.54
2008-01-01	5.25
2008-04-01	5.00
2008-07-01	5.00
2008-10-01	2.14
2009-01-01	0.57
2009-04-01	0.50
2009-07-01	0.50
2009-10-01	0.50
2010-01-01	0.50
2010-04-01	0.50
2010-07-01	0.50
2010-10-01	0.50
2011-01-01	0.50
2011-04-01	0.50
2011-07-01	0.50
2011-10-01	0.50
2012-01-01	0.50
2012-04-01	0.50
2012-07-01	0.50
2012-10-01	0.50
2013-01-01	0.50
2013-04-01	0.50
2013-07-01	0.50
2013-10-01	0.50
2014-01-01	0.50
2014-04-01	0.50
2014-07-01	0.50
2014-10-01	0.50
2015-01-01	0.50
2015-04-01	0.50