Quarter	Percent
1978-03-31	6.375
1978-06-30	10.005
1978-09-30	9.125
1978-12-31	11.94
1979-03-31	12.655
1979-06-30	14.255
1979-09-30	14.035
1979-12-31	17.095
1980-03-31	18.285
1980-06-30	17.75
1980-09-30	16.345
1980-12-31	14.845
1981-03-31	12.595
1981-06-30	12.005
1981-09-30	16.405
1981-12-31	15.405
1982-03-31	13.565
1982-06-30	13.03
1982-09-30	10.875
1982-12-31	10.66
1983-03-31	11
1983-06-30	9.75
1983-09-30	9.87
1983-12-31	9.315
1984-03-31	8.94
1984-06-30	9
1984-09-30	10.87
1984-12-31	9.75
1985-03-31	13.75
1985-06-30	12.75
1985-09-30	11.69
1985-12-31	11.69
1986-03-31	11.875
1986-06-30	10.065
1986-09-30	10.755
1986-12-31	11.19
1987-03-31	9.94
1987-06-30	9.125
1987-09-30	10.375
1987-12-31	8.595
1988-03-31	8.595
1988-06-30	9.345
1988-09-30	11.815
1988-12-31	12.97
1989-03-31	12.91
1989-06-30	13.97
1989-09-30	14.315
1989-12-31	15.06
1990-03-31	14.985
1990-06-30	14.955
1990-09-30	14.955
1990-12-31	14.36
1991-03-31	12.845
1991-06-30	11.545
1991-09-30	10.645
1991-12-31	10.895
1992-03-31	10.47
1992-06-30	10.13
1992-09-30	9.22
1992-12-31	6.91
1993-03-31	5.925
1993-06-30	5.955
1993-09-30	6.095
1993-12-31	5.36
1994-03-31	5.11
1994-06-30	5.015
1994-09-30	5.345
1994-12-31	6.03
1995-03-31	6.5
1995-06-30	6.56
1995-09-30	6.735
1995-12-31	6.485
1996-03-31	6.015
1996-06-30	5.735
1996-09-30	5.845
1996-12-31	6.175
1997-03-31	6.095
1997-06-30	6.575
1997-09-30	7.11
1997-12-31	7.47
1998-03-31	7.485
1998-06-30	7.5469
1998-09-30	7.395
1998-12-31	6.265
1999-03-31	5.295
1999-06-30	5.03
1999-09-30	5.325
1999-12-31	5.2813
2000-03-31	5.9844
2000-06-30	5.9844
2000-09-30	6.0313
2000-12-31	5.7813
2001-03-31	5.6407
2001-06-30	5.1719
2001-09-30	4.6407
2001-12-31	4.0469
2002-03-31	3.9688
2002-06-30	3.9219
2002-09-30	3.875
2002-12-31	3.97
2003-03-31	3.63
2003-06-30	3.605
2003-09-30	3.625
2003-12-31	3.865
2004-03-31	4.13
2004-06-30	4.555
2004-09-30	4.78
2004-12-31	4.795
2005-03-31	4.815
2005-06-30	4.755
2005-09-30	4.54
2005-12-31	4.605
2006-03-31	4.525
2006-06-30	4.64
2006-09-30	4.915
2006-12-31	5.22
2007-03-31	5.425
2007-06-30	5.825
2007-09-30	6.08
2007-12-31	5.925
2008-03-31	5.75
2008-06-30	5.465
2008-09-30	6.05
2008-12-31	2.15
2009-03-31	1
2009-06-30	0.6
2009-09-30	0.525
2009-12-31	0.53
2010-03-31	0.525
2010-06-30	0.575
2010-09-30	0.575
2010-12-31	0.615
2011-03-31	0.625
2011-06-30	0.66
2011-09-30	0.715
2011-12-31	0.81
2012-03-31	0.73
2012-06-30	0.6
2012-09-30	0.475
2012-12-31	0.47
2013-03-31	0.455
2013-06-30	0.46
2013-09-30	0.48
2013-12-31	0.475
2014-03-31	0.47
2014-06-30	0.475
2014-09-30	0.465
2014-12-31	0.465
2015-03-31	0.475
2015-06-30	0.505
2015-09-30	0.505
2015-12-31	0.505
2016-03-31	0.49
2016-06-30	0.49
2016-09-30	0.31
2016-12-31	0.3
2017-03-31	0.28
2017-06-30	0.28
2017-09-30	0.29