Quarter	Percent
1978-03-31	6.125
1978-06-30	10.13
1978-09-30	8.69
1978-12-31	11.125
1979-03-31	12.94
1979-06-30	14.315
1979-09-30	13.875
1979-12-31	17.19
1980-03-31	18
1980-06-30	18.44
1980-09-30	16.315
1980-12-31	14.435
1981-03-31	12.255
1981-06-30	11.94
1981-09-30	15.94
1981-12-31	14.815
1982-03-31	13.315
1982-06-30	12.815
1982-09-30	11.19
1982-12-31	10.315
1983-03-31	10.875
1983-06-30	9.625
1983-09-30	10.125
1983-12-31	9.315
1984-03-31	8.935
1984-06-30	8.695
1984-09-30	10.94
1984-12-31	9.69
1985-03-31	14.255
1985-06-30	12.815
1985-09-30	11.875
1985-12-31	11.69
1986-03-31	12.19
1986-06-30	10.255
1986-09-30	9.505
1986-12-31	11.19
1987-03-31	10.065
1987-06-30	9.19
1987-09-30	10.125
1987-12-31	8.595
1988-03-31	8.69
1988-06-30	8.565
1988-09-30	11.875
1988-12-31	12.94
1989-03-31	12.78
1989-06-30	13.91
1989-09-30	13.815
1989-12-31	14.755
1990-03-31	14.875
1990-06-30	15
1990-09-30	14.94
1990-12-31	14.315
1991-03-31	12.78
1991-06-30	11.625
1991-09-30	10.78
1991-12-31	10.44
1992-03-31	10.16
1992-06-30	10.22
1992-09-30	9.19
1992-12-31	6.125
1993-03-31	5.78
1993-06-30	6.13
1993-09-30	6.19
1993-12-31	5.28
1994-03-31	4.66
1994-06-30	4.97
1994-09-30	5.095
1994-12-31	5.315
1995-03-31	6.22
1995-06-30	6.28
1995-09-30	6.735
1995-12-31	6.41
1996-03-31	6.03
1996-06-30	5.72
1996-09-30	5.845
1996-12-31	6.06
1997-03-31	6.03
1997-06-30	6.47
1997-09-30	7.045
1997-12-31	7.345
1998-03-31	7.47
1998-06-30	7.4063
1998-09-30	7.44
1998-12-31	6.345
1999-03-31	5.375
1999-06-30	5
1999-09-30	5.315
1999-12-31	3.6875
2000-03-31	5.875
2000-06-30	5.7813
2000-09-30	6.0313
2000-12-31	5.2188
2001-03-31	6.2813
2001-06-30	5
2001-09-30	5.125
2001-12-31	4.4688
2002-03-31	3.4688
2002-06-30	3.7188
2002-09-30	3.7188
2002-12-31	4.2813
2003-03-31	3.9063
2003-06-30	3.625
2003-09-30	3.5
2003-12-31	3.6875
2004-03-31	3.9063
2004-06-30	4.5938
2004-09-30	4.7656
2004-12-31	4.755
2005-03-31	4.775
2005-06-30	4.79
2005-09-30	4.51
2005-12-31	4.715
2006-03-31	4.59
2006-06-30	4.615
2006-09-30	4.895
2006-12-31	5.23
2007-03-31	5.335
2007-06-30	6
2007-09-30	5.95
2007-12-31	5.8
2008-03-31	5.475
2008-06-30	5.13
2008-09-30	5.85
2008-12-31	1.75
2009-03-31	0.65
2009-06-30	0.525
2009-09-30	0.515
2009-12-31	0.5
2010-03-31	0.475
2010-06-30	0.535
2010-09-30	0.535
2010-12-31	0.575
2011-03-31	0.55
2011-06-30	0.625
2011-09-30	0.65
2011-12-31	0.65
2012-03-31	0.6
2012-06-30	0.56
2012-09-30	0.475
2012-12-31	0.45
2013-03-31	0.475
2013-06-30	0.475
2013-09-30	0.475
2013-12-31	0.475
2014-03-31	0.475
2014-06-30	0.475
2014-09-30	0.45
2014-12-31	0.45
2015-03-31	0.45
2015-06-30	0.45
2015-09-30	0.425
2015-12-31	0.425
2016-03-31	0.45
2016-06-30	0.45
2016-09-30	0.235
2016-12-31	0.24
2017-03-31	0.23
2017-06-30	0.23
2017-09-30	0.24