Quarter	Percent
1968-01-01	5.000
1968-04-01	5.000
1968-07-01	5.000
1968-10-01	5.000
1969-01-01	5.000
1969-04-01	5.000
1969-07-01	5.000
1969-10-01	5.000
1970-01-01	5.000
1970-04-01	5.000
1970-07-01	5.000
1970-10-01	5.000
1971-01-01	6.000
1971-04-01	6.000
1971-07-01	6.000
1971-10-01	6.000
1972-01-01	6.000
1972-04-01	6.000
1972-07-01	6.000
1972-10-01	6.000
1973-01-01	6.000
1973-04-01	7.000
1973-07-01	7.000
1973-10-01	7.000
1974-01-01	7.000
1974-04-01	7.000
1974-07-01	9.000
1974-10-01	9.000
1975-01-01	9.000
1975-04-01	9.000
1975-07-01	9.000
1975-10-01	9.000
1976-01-01	9.000
1976-04-01	9.000
1976-07-01	9.000
1976-10-01	9.000
1977-01-01	9.000
1977-04-01	9.000
1977-07-01	9.000
1977-10-01	9.000
1978-01-01	9.000
1978-04-01	9.000
1978-07-01	9.000
1978-10-01	9.000
1979-01-01	9.000
1979-04-01	9.000
1979-07-01	9.000
1979-10-01	9.000
1980-01-01	9.000
1980-04-01	9.000
1980-07-01	9.000
1980-10-01	9.000
1981-01-01	9.000
1981-04-01	9.000
1981-07-01	10.000
1981-10-01	10.000
1982-01-01	10.000
1982-04-01	10.000
1982-07-01	10.000
1982-10-01	10.000
1983-01-01	10.000
1983-04-01	10.000
1983-07-01	10.000
1983-10-01	10.000
1984-01-01	10.000
1984-04-01	10.000
1984-07-01	10.000
1984-10-01	10.000
1985-01-01	10.000
1985-04-01	10.000
1985-07-01	10.000
1985-10-01	10.000
1986-01-01	10.000
1986-04-01	10.000
1986-07-01	10.000
1986-10-01	10.000
1987-01-01	10.000
1987-04-01	10.000
1987-07-01	10.000
1987-10-01	10.000
1988-01-01	10.000
1988-04-01	10.000
1988-07-01	10.000
1988-10-01	10.000
1989-01-01	10.000
1989-04-01	10.000
1989-07-01	10.000
1989-10-01	10.000
1990-01-01	10.000
1990-04-01	10.000
1990-07-01	10.000
1990-10-01	10.000
1991-01-01	10.000
1991-04-01	10.000
1991-07-01	11.000
1991-10-01	12.000
1992-01-01	12.000
1992-04-01	12.000
1992-07-01	12.000
1992-10-01	12.000
1993-01-01	12.000
1993-04-01	12.000
1993-07-01	12.000
1993-10-01	12.000
1994-01-01	12.000
1994-04-01	12.000
1994-07-01	12.000
1994-10-01	12.000
1995-01-01	12.000
1995-04-01	12.000
1995-07-01	12.000
1995-10-01	12.000
1996-01-01	12.000
1996-04-01	12.000
1996-07-01	12.000
1996-10-01	12.000
1997-01-01	12.000
1997-04-01	10.000
1997-07-01	10.000
1997-10-01	9.000
1998-01-01	10.500
1998-04-01	9.000
1998-07-01	9.000
1998-10-01	9.000
1999-01-01	8.000
1999-04-01	8.000
1999-07-01	8.000
1999-10-01	8.000
2000-01-01	8.000
2000-04-01	7.000
2000-07-01	8.000
2000-10-01	8.000
2001-01-01	7.000
2001-04-01	7.000
2001-07-01	7.000
2001-10-01	6.500
2002-01-01	6.500
2002-04-01	6.500
2002-07-01	6.500
2002-10-01	6.250
2003-01-01	6.250
2003-04-01	6.000
2003-07-01	6.000
2003-10-01	6.000
2004-01-01	6.000
2004-04-01	6.000
2004-07-01	6.000
2004-10-01	6.000
2005-01-01	6.000
2005-04-01	6.000
2005-07-01	6.000
2005-10-01	6.000
2006-01-01	6.000
2006-04-01	6.000
2006-07-01	6.000
2006-10-01	6.000
2007-01-01	6.000
2007-04-01	6.000
2007-07-01	6.000
2007-10-01	6.000
2008-01-01	6.000
2008-04-01	6.000
2008-07-01	6.000
2008-10-01	6.000
2009-01-01	6.000
2009-04-01	6.000
2009-07-01	6.000
2009-10-01	6.000
2010-01-01	6.000
2010-04-01	6.000
2010-07-01	6.000
2010-10-01	6.000
2011-01-01	6.000
2011-04-01	6.000
2011-07-01	6.000
2011-10-01	6.000
2012-01-01	9.500
2012-04-01	9.000
2012-07-01	9.000
2012-10-01	9.000
2013-01-01	8.650
2013-04-01	8.250
2013-07-01	9.875
2013-10-01	8.750
2014-01-01	9.000
2014-04-01	9.000
2014-07-01	9.000
2014-10-01	9.000
2015-01-01	8.500
2015-04-01	8.250
2015-07-01	8.250
2015-10-01	7.750
2016-01-01	7.750
2016-04-01	7.000
2016-07-01	7.000
2016-10-01	6.750
2017-01-01	6.750
2017-04-01	6.500
2017-07-01	6.250
2017-10-01	6.250
2018-01-01	6.250
2018-04-01	6.450
2018-07-01	6.750