Quarter	Percent
1981-03-31	14.625
1981-06-30	17.625
1981-09-30	17.875
1981-12-31	13.625
1982-03-31	15.5
1982-06-30	15.75
1982-09-30	10.4377
1982-12-31	9.25
1983-03-31	9.6875
1983-06-30	9.6875
1983-09-30	9.5
1983-12-31	9.9375
1984-03-31	10.688
1984-06-30	12.1875
1984-09-30	11.4375
1984-12-31	8.6875
1985-03-31	9.0625
1985-06-30	7.75
1985-09-30	8.1255
1985-12-31	7.9375
1986-03-31	7.375
1986-06-30	6.8125
1986-09-30	6.0625
1986-12-31	6.3125
1987-03-31	6.563
1987-06-30	7.125
1987-09-30	8.3125
1987-12-31	7.3755
1988-03-31	6.8125
1988-06-30	7.8755
1988-09-30	8.6255
1988-12-31	9.2505
1989-03-31	10.2815
1989-06-30	9.3438
1989-09-30	9.1563
1989-12-31	8.3438
1990-03-31	8.4688
1990-06-30	8.3438
1990-09-30	8.2813
1990-12-31	7.5313
1991-03-31	6.3438
1991-06-30	6.1563
1991-09-30	5.5938
1991-12-31	4.2188
1992-03-31	4.3125
1992-06-30	3.8425
1992-09-30	3.19
1992-12-31	3.3738
1993-03-31	3.19
1993-06-30	3.2513
1993-09-30	3.3125
1993-12-31	3.3125
1994-03-31	3.8738
1994-06-30	4.8125
1994-09-30	5.44
1994-12-31	6.44
1995-03-31	6.19
1995-06-30	5.94
1995-09-30	5.815
1995-12-31	5.535
1996-03-31	5.565
1996-06-30	5.47
1996-09-30	5.515
1996-12-31	5.495
1997-03-31	5.73
1997-06-30	5.72
1997-09-30	5.705
1997-12-31	5.685
1998-03-31	5.66
1998-06-30	5.62
1998-09-30	5.265
1998-12-31	5
1999-03-31	4.88
1999-06-30	5.35
1999-09-30	5.95
1999-12-31	5.98
2000-03-31	6.29
2000-06-30	6.76
2000-09-30	6.74
2000-12-31	6.35
2001-03-31	4.86
2001-06-30	3.8
2001-09-30	2.52
2001-12-31	1.83
2002-03-31	2
2002-06-30	1.83
2002-09-30	1.74
2002-12-31	1.345
2003-03-31	1.25
2003-06-30	1.09
2003-09-30	1.13
2003-12-31	1.1
2004-03-31	1.05
2004-06-30	1.56
2004-09-30	1.975
2004-12-31	2.56
2005-03-31	3.04
2005-06-30	3.505
2005-09-30	4.065
2005-12-31	4.505
2006-03-31	4.98
2006-06-30	5.46
2006-09-30	5.33
2006-12-31	5.34
2007-03-31	5.31
2007-06-30	5.345
2007-09-30	5.33
2007-12-31	4.77
2008-03-31	2.995
2008-06-30	2.99
2008-09-30	5.32
2008-12-31	1.41
2009-03-31	1.16
2009-06-30	0.92
2009-09-30	0.58
2009-12-31	0.48
2010-03-31	0.36
2010-06-30	0.9
2010-09-30	0.385
2010-12-31	0.43
2011-03-31	0.515
2011-06-30	0.26
2011-09-30	0.35
2011-12-31	0.68
2012-03-31	0.35
2012-06-30	0.515
2012-09-30	0.25
2012-12-31	0.415
2013-03-31	0.43
2013-06-30	0.32
2013-09-30	0.28
2013-12-31	0.32
2014-03-31	0.24
2014-06-30	0.29
2014-09-30	0.28
2014-12-31	0.425
2015-03-31	0.47
2015-06-30	0.4
2015-09-30	0.535
2015-12-31	0.76
2016-03-31	0.835
2016-06-30	1.06
2016-09-30	0.85
2016-12-31	0.995
2017-03-31	1.3
2017-06-30	1.35
2017-09-30	1.38
2017-12-31	1.76
2018-03-31	2.38
2018-06-30	2.39
2018-09-30	2.45
2018-12-31	2.87
2019-03-31	2.6
2019-06-30	2.31
2019-09-30	2.12
2019-12-31	1.92