Quarter	Percent
1981-03-31	14.75
1981-06-30	17.75
1981-09-30	18
1981-12-31	13.75
1982-03-31	15.625
1982-06-30	15.875
1982-09-30	10.5625
1982-12-31	9.375
1983-03-31	9.8125
1983-06-30	9.8125
1983-09-30	9.625
1983-12-31	10.0625
1984-03-31	10.813
1984-06-30	12.25
1984-09-30	11.5
1984-12-31	8.75
1985-03-31	9.125
1985-06-30	7.8125
1985-09-30	8.188
1985-12-31	8
1986-03-31	7.4375
1986-06-30	6.875
1986-09-30	6.125
1986-12-31	6.375
1987-03-31	6.626
1987-06-30	7.1875
1987-09-30	8.375
1987-12-31	7.438
1988-03-31	6.875
1988-06-30	7.938
1988-09-30	8.688
1988-12-31	9.313
1989-03-31	10.313
1989-06-30	9.375
1989-09-30	9.1875
1989-12-31	8.375
1990-03-31	8.5
1990-06-30	8.375
1990-09-30	8.3125
1990-12-31	7.5625
1991-03-31	6.375
1991-06-30	6.1875
1991-09-30	5.625
1991-12-31	4.25
1992-03-31	4.375
1992-06-30	3.875
1992-09-30	3.25
1992-12-31	3.4375
1993-03-31	3.25
1993-06-30	3.3125
1993-09-30	3.375
1993-12-31	3.375
1994-03-31	3.9375
1994-06-30	4.875
1994-09-30	5.5
1994-12-31	6.5
1995-03-31	6.25
1995-06-30	6
1995-09-30	5.88
1995-12-31	5.63
1996-03-31	5.63
1996-06-30	5.52
1996-09-30	5.58
1996-12-31	5.56
1997-03-31	5.78
1997-06-30	5.78
1997-09-30	5.71
1997-12-31	5.75
1998-03-31	5.69
1998-06-30	5.65
1998-09-30	5.28
1998-12-31	5.06
1999-03-31	4.93
1999-06-30	5.38
1999-09-30	6
1999-12-31	6.03
2000-03-31	6.32
2000-06-30	6.79
2000-09-30	6.77
2000-12-31	6.41
2001-03-31	4.92
2001-06-30	3.85
2001-09-30	2.57
2001-12-31	1.86
2002-03-31	2.05
2002-06-30	1.88
2002-09-30	1.79
2002-12-31	1.37
2003-03-31	1.3
2003-06-30	1.13
2003-09-30	1.17
2003-12-31	1.14
2004-03-31	1.1
2004-06-30	1.6
2004-09-30	1.99
2004-12-31	2.58
2005-03-31	3.07
2005-06-30	3.52
2005-09-30	4.09
2005-12-31	4.54
2006-03-31	5.03
2006-06-30	5.48
2006-09-30	5.35
2006-12-31	5.38
2007-03-31	5.35
2007-06-30	5.36
2007-09-30	5.37
2007-12-31	4.82
2008-03-31	3.07
2008-06-30	3.04
2008-09-30	6.32
2008-12-31	1.66
2009-03-31	1.19
2009-06-30	1.05
2009-09-30	0.68
2009-12-31	0.53
2010-03-31	0.4
2010-06-30	1.03
2010-09-30	0.51
2010-12-31	0.48
2011-03-31	0.65
2011-06-30	0.31
2011-09-30	0.4
2011-12-31	0.78
2012-03-31	0.4
2012-06-30	0.64
2012-09-30	0.3
2012-12-31	0.48
2013-03-31	0.48
2013-06-30	0.37
2013-09-30	0.33
2013-12-31	0.4
2014-03-31	0.29
2014-06-30	0.34
2014-09-30	0.33
2014-12-31	0.5
2015-03-31	0.52
2015-06-30	0.5
2015-09-30	0.58
2015-12-31	0.81
2016-03-31	0.88
2016-06-30	1.16
2016-09-30	0.9
2016-12-31	1.01
2017-03-31	1.4
2017-06-30	1.45
2017-09-30	1.48
2017-12-31	1.86
2018-03-31	2.48
2018-06-30	2.49
2018-09-30	2.55
2018-12-31	2.97
2019-03-31	2.7
2019-06-30	2.41
2019-09-30	2.22
2019-12-31	2.02