Quarter	Percent
1978-03-31	6.6875
1978-06-30	10.0938
1978-09-30	9.625
1978-12-31	12.5
1979-03-31	11.7813
1979-06-30	13.9375
1979-09-30	14.125
1979-12-31	16.875
1980-03-31	18.375
1980-06-30	16.9375
1980-09-30	15.6407
1980-12-31	14.7813
1981-03-31	12.4375
1981-06-30	12.5
1981-09-30	16.7188
1981-12-31	15.625
1982-03-31	13.375
1982-06-30	12.9375
1982-09-30	10.375
1982-12-31	10.25
1983-03-31	10.6875
1983-06-30	9.6876
1983-09-30	9.4688
1983-12-31	9.297
1984-03-31	8.844
1984-06-30	9.375
1984-09-30	10.5938
1984-12-31	9.8125
1985-03-31	13
1985-06-30	12.375
1985-09-30	11.375
1985-12-31	11.8125
1986-03-31	11.25
1986-06-30	9.66
1986-09-30	11
1986-12-31	11.13
1987-03-31	9.81
1987-06-30	9.06
1987-09-30	10.125
1987-12-31	8.75
1988-03-31	8.565
1988-06-30	9.75
1988-09-30	11.815
1988-12-31	13
1989-03-31	12.94
1989-06-30	14
1989-09-30	14.315
1989-12-31	15.06
1990-03-31	15.16
1990-06-30	14.91
1990-09-30	14.91
1990-12-31	13.845
1991-03-31	12.265
1991-06-30	11.16
1991-09-30	10.22
1991-12-31	10.845
1992-03-31	10.69
1992-06-30	9.985
1992-09-30	8.845
1992-12-31	6.91
1993-03-31	5.845
1993-06-30	5.795
1993-09-30	5.845
1993-12-31	5.235
1994-03-31	5.22
1994-06-30	5.075
1994-09-30	5.69
1994-12-31	6.425
1995-03-31	6.545
1995-06-30	6.78
1995-09-30	6.72
1995-12-31	6.455
1996-03-31	6.01
1996-06-30	5.705
1996-09-30	5.845
1996-12-31	6.41
1997-03-31	6.265
1997-06-30	6.795
1997-09-30	7.2031
1997-12-31	7.515
1998-03-31	7.4844
1998-06-30	7.75
1998-09-30	7.22
1998-12-31	6.125
1999-03-31	5.175
1999-06-30	5.045
1999-09-30	5.41
1999-12-31	5.9063
2000-03-31	6.1407
2000-06-30	6.0938
2000-09-30	6.0626
2000-12-31	5.7813
2001-03-31	5.415
2001-06-30	5.18
2001-09-30	4.46
2001-12-31	4
2002-03-31	4.1
2002-06-30	4.06
2002-09-30	3.855
2002-12-31	3.92
2003-03-31	3.58
2003-06-30	3.555
2003-09-30	3.64
2003-12-31	3.965
2004-03-31	4.31
2004-06-30	4.76
2004-09-30	4.84
2004-12-31	4.8
2005-03-31	4.9
2005-06-30	4.71
2005-09-30	4.54
2005-12-31	4.59
2006-03-31	4.55
2006-06-30	4.72
2006-09-30	5.035
2006-12-31	5.275
2007-03-31	5.675
2007-06-30	6.075
2007-09-30	6.23
2007-12-31	5.95
2008-03-31	5.98
2008-06-30	5.91
2008-09-30	6.225
2008-12-31	2.775
2009-03-31	1.575
2009-06-30	1.075
2009-09-30	0.475
2009-12-31	0.575
2010-03-31	0.625
2010-06-30	0.775
2010-09-30	0.725
2010-12-31	0.825
2011-03-31	0.875
2011-06-30	0.875
2011-09-30	1.045
2011-12-31	1.175
2012-03-31	1.105
2012-06-30	0.965
2012-09-30	0.575
2012-12-31	0.575
2013-03-31	0.565
2013-06-30	0.525
2013-09-30	0.525
2013-12-31	0.575
2014-03-31	0.575
2014-06-30	0.575
2014-09-30	0.55
2014-12-31	0.55
2015-03-31	0.55
2015-06-30	0.55
2015-09-30	0.55
2015-12-31	0.65
2016-03-31	0.65
2016-06-30	0.55
2016-09-30	0.35
2016-12-31	0.35
2017-03-31	0.35
2017-06-30	0.35
2017-09-30	0.3
2017-12-31	0.5
2018-03-31	0.7
2018-06-30	0.65