Month	Percent
1978-01-31	6.44
1978-02-28	6.94
1978-03-31	6.94
1978-04-30	8.375
1978-05-31	9.47
1978-06-30	10.155
1978-07-31	9.875
1978-08-31	9.345
1978-09-30	9.75
1978-10-31	11.19
1978-11-30	12.25
1978-12-31	12.565
1979-01-31	13.19
1979-02-28	12.375
1979-03-31	12.125
1979-04-30	11.72
1979-05-31	11.815
1979-06-30	14.065
1979-07-31	14.28
1979-08-31	14.25
1979-09-30	14.16
1979-10-31	14.815
1979-11-30	16.875
1979-12-31	17.065
1980-01-31	17.875
1980-02-29	18.19
1980-03-31	18.565
1980-04-30	17.125
1980-05-31	17.065
1980-06-30	17.125
1980-07-31	15.875
1980-08-31	16.875
1980-09-30	15.94
1980-10-31	16.845
1980-11-30	14.625
1980-12-31	14.875
1981-01-31	13.78
1981-02-28	12.625
1981-03-31	12.595
1981-04-30	12.5
1981-05-31	12.5
1981-06-30	12.66
1981-07-31	14.69
1981-08-31	14.065
1981-09-30	16.875
1981-10-31	16.47
1981-11-30	15.005
1981-12-31	15.75
1982-01-31	14.53
1982-02-28	14.065
1982-03-31	13.625
1982-04-30	13.75
1982-05-31	13.44
1982-06-30	13.065
1982-07-31	11.875
1982-08-31	10.94
1982-09-30	10.565
1982-10-31	9.625
1982-11-30	10.44
1982-12-31	10.5
1983-01-31	11.595
1983-02-28	11.315
1983-03-31	10.845
1983-04-30	10.22
1983-05-31	10.345
1983-06-30	9.69
1983-07-31	9.97
1983-08-31	9.845
1983-09-30	9.66
1983-10-31	9.345
1983-11-30	9.28
1983-12-31	9.375
1984-01-31	9.41
1984-02-29	9.25
1984-03-31	8.97
1984-04-30	8.91
1984-05-31	10
1984-06-30	9.47
1984-07-31	12.345
1984-08-31	10.78
1984-09-30	10.78
1984-10-31	10.565
1984-11-30	9.78
1984-12-31	10.03
1985-01-31	12.565
1985-02-28	13.97
1985-03-31	13.155
1985-04-30	12.66
1985-05-31	12.53
1985-06-30	12.53
1985-07-31	11.22
1985-08-31	11.655
1985-09-30	11.565
1985-10-31	11.595
1985-11-30	11.53
1985-12-31	11.91
1986-01-31	12.875
1986-02-28	12.44
1986-03-31	11.345
1986-04-30	10.47
1986-05-31	9.815
1986-06-30	9.78
1986-07-31	9.97
1986-08-31	9.925
1986-09-30	10.94
1986-10-31	11.125
1986-11-30	11.41
1986-12-31	11.22
1987-01-31	11.03
1987-02-28	10.795
1987-03-31	9.94
1987-04-30	9.44
1987-05-31	8.875
1987-06-30	9.22
1987-07-31	9.315
1987-08-31	10.41
1987-09-30	10.315
1987-10-31	9.25
1987-11-30	8.97
1987-12-31	8.925
1988-01-31	8.75
1988-02-29	9.36
1988-03-31	8.66
1988-04-30	8.455
1988-05-31	7.735
1988-06-30	9.895
1988-07-31	10.86
1988-08-31	12.295
1988-09-30	11.925
1988-10-31	12.06
1988-11-30	13.125
1988-12-31	13.205
1989-01-31	13.03
1989-02-28	13.375
1989-03-31	13.045
1989-04-30	12.91
1989-05-31	14.28
1989-06-30	14.22
1989-07-31	13.845
1989-08-31	13.97
1989-09-30	14.66
1989-10-31	15.345
1989-11-30	15.19
1989-12-31	15.145
1990-01-31	15.0781
1990-02-28	15.125
1990-03-31	15.235
1990-04-30	15.325
1990-05-31	15.16
1990-06-30	14.955
1990-07-31	15.03
1990-08-31	14.985
1990-09-30	14.955
1990-10-31	13.72
1990-11-30	13.53
1990-12-31	14.03
1991-01-31	13.91
1991-02-28	12.72
1991-03-31	12.41
1991-04-30	11.75
1991-05-31	11.395
1991-06-30	11.31
1991-07-31	11.145
1991-08-31	10.795
1991-09-30	10.325
1991-10-31	10.455
1991-11-30	10.61
1991-12-31	10.94
1992-01-31	10.645
1992-02-29	10.325
1992-03-31	10.81
1992-04-30	10.61
1992-05-31	10
1992-06-30	10.095
1992-07-31	10.28
1992-08-31	10.595
1992-09-30	8.97
1992-10-31	7.595
1992-11-30	7.345
1992-12-31	7
1993-01-31	6.28
1993-02-28	6.13
1993-03-31	5.94
1993-04-30	6.13
1993-05-31	5.875
1993-06-30	5.94
1993-07-31	5.91
1993-08-31	5.91
1993-09-30	5.985
1993-10-31	5.66
1993-11-30	5.395
1993-12-31	5.31
1994-01-31	5.41
1994-02-28	5.145
1994-03-31	5.31
1994-04-30	5.19
1994-05-31	5.16
1994-06-30	5.145
1994-07-31	5.41
1994-08-31	5.5
1994-09-30	5.83
1994-10-31	5.97
1994-11-30	6.175
1994-12-31	6.545
1995-01-31	6.72
1995-02-28	6.705
1995-03-31	6.61
1995-04-30	6.925
1995-05-31	6.625
1995-06-30	6.895
1995-07-31	6.825
1995-08-31	6.765
1995-09-30	6.765
1995-10-31	6.705
1995-11-30	6.5
1995-12-31	6.485
1996-01-31	6.22
1996-02-29	6.095
1996-03-31	6.03
1996-04-30	6.015
1996-05-31	6.045
1996-06-30	5.765
1996-07-31	5.735
1996-08-31	5.705
1996-09-30	5.86
1996-10-31	6.19
1996-11-30	6.325
1996-12-31	6.455
1997-01-31	6.235
1997-02-28	6.16
1997-03-31	6.295
1997-04-30	6.485
1997-05-31	6.545
1997-06-30	6.825
1997-07-31	7.03
1997-08-31	7.235
1997-09-30	7.235
1997-10-31	7.28
1997-11-30	7.645
1997-12-31	7.545
1998-01-31	7.455
1998-02-28	7.485
1998-03-31	7.515
1998-04-30	7.395
1998-05-31	7.425
1998-06-30	7.7969
1998-07-31	7.705
1998-08-31	7.575
1998-09-30	7.28
1998-10-31	7.11
1998-11-30	6.795
1998-12-31	6.175
1999-01-31	5.72
1999-02-28	5.39
1999-03-31	5.22
1999-04-30	5.235
1999-05-31	5.265
1999-06-30	5.11
1999-07-31	5.19
1999-08-31	5.125
1999-09-30	5.455
1999-10-31	5.91
1999-11-30	5.91
1999-12-31	5.9688
2000-01-31	6.1251
2000-02-29	6.1876
2000-03-31	6.1876
2000-04-30	6.2813
2000-05-31	6.2032
2000-06-30	6.1407
2000-07-31	6.1719
2000-08-31	6.1719
2000-09-30	6.1094
2000-10-31	6.0469
2000-11-30	5.9532
2000-12-31	5.8282
2001-01-31	5.7032
2001-02-28	5.5469
2001-03-31	5.4532
2001-04-30	5.2657
2001-05-31	5.1719
2001-06-30	5.2188
2001-07-31	5.1876
2001-08-31	4.8594
2001-09-30	4.4376
2001-10-31	4.1563
2001-11-30	3.9688
2001-12-31	4.0469
2002-01-31	4
2002-02-28	3.9844
2002-03-31	4.125
2002-04-30	4.0938
2002-05-31	4.1094
2002-06-30	4.0781
2002-07-31	3.9531
2002-08-31	3.9375
2002-09-30	3.8906
2002-10-31	3.8906
2002-11-30	3.96
2002-12-31	3.95
2003-01-31	3.895
2003-02-28	3.615
2003-03-31	3.59
2003-04-30	3.565
2003-05-31	3.555
2003-06-30	3.57
2003-07-31	3.38
2003-08-31	3.555
2003-09-30	3.665
2003-10-31	3.88
2003-11-30	3.92
2003-12-31	3.965
2004-01-31	4.075
2004-02-29	4.135
2004-03-31	4.315
2004-04-30	4.37
2004-05-31	4.575
2004-06-30	4.78
2004-07-31	4.875
2004-08-31	4.89
2004-09-30	4.84
2004-10-31	4.825
2004-11-30	4.785
2004-12-31	4.825
2005-01-31	4.8
2005-02-28	4.885
2005-03-31	4.915
2005-04-30	4.87
2005-05-31	4.8
2005-06-30	4.71
2005-07-31	4.55
2005-08-31	4.53
2005-09-30	4.535
2005-10-31	4.55
2005-11-30	4.565
2005-12-31	4.58
2006-01-31	4.53
2006-02-28	4.52
2006-03-31	4.55
2006-04-30	4.615
2006-05-31	4.67
2006-06-30	4.72
2006-07-31	4.735
2006-08-31	4.945
2006-09-30	5.035
2006-10-31	5.15
2006-11-30	5.21
2006-12-31	5.275
2007-01-31	5.545
2007-02-28	5.49
2007-03-31	5.57
2007-04-30	5.68
2007-05-31	5.77
2007-06-30	5.955
2007-07-31	6.01
2007-08-31	6.6
2007-09-30	6.23
2007-10-31	6.21
2007-11-30	6.555
2007-12-31	5.95
2008-01-31	5.54
2008-02-29	5.7
2008-03-31	5.985
2008-04-30	5.8
2008-05-31	5.835
2008-06-30	5.91
2008-07-31	5.77
2008-08-31	5.725
2008-09-30	6.225
2008-10-31	5.925
2008-11-30	3.975
2008-12-31	2.825
2009-01-31	2.125
2009-02-28	2.05
2009-03-31	1.65
2009-04-30	1.375
2009-05-31	1.225
2009-06-30	1.175
2009-07-31	0.9
2009-08-31	0.7
2009-09-30	0.575
2009-10-31	0.6
2009-11-30	0.6
2009-12-31	0.625
2010-01-31	0.6
2010-02-28	0.6
2010-03-31	0.6
2010-04-30	0.6
2010-05-31	0.675
2010-06-30	0.75
2010-07-31	0.75
2010-08-31	0.75
2010-09-30	0.75
2010-10-31	0.75
2010-11-30	0.745
2010-12-31	0.775
2011-01-31	0.775
2011-02-28	0.775
2011-03-31	0.8
2011-04-30	0.8
2011-05-31	0.8
2011-06-30	0.86
2011-07-31	0.86
2011-08-31	0.94
2011-09-30	1.005
2011-10-31	1.03
2011-11-30	1.075
2011-12-31	1.1
2012-01-31	1.11
2012-02-29	1.09
2012-03-31	1.06
2012-04-30	1.02
2012-05-31	0.995
2012-06-30	0.915
2012-07-31	0.815
2012-08-31	0.66
2012-09-30	0.61
2012-10-31	0.515
2012-11-30	0.5
2012-12-31	0.5
2013-01-31	0.49
2013-02-28	0.49
2013-03-31	0.485
2013-04-30	0.485
2013-05-31	0.485
2013-06-30	0.485
2013-07-31	0.485
2013-08-31	0.485
2013-09-30	0.495
2013-10-31	0.495
2013-11-30	0.545
2013-12-31	0.53
2014-01-31	0.53
2014-02-28	0.53
2014-03-31	0.53
2014-04-30	0.55
2014-05-31	0.55
2014-06-30	0.55
2014-07-31	0.545
2014-08-31	0.545
2014-09-30	0.555
2014-10-31	0.53
2014-11-30	0.53
2014-12-31	0.53
2015-01-31	0.53
2015-02-28	0.53
2015-03-31	0.53
2015-04-30	0.54
2015-05-31	0.54
2015-06-30	0.565
2015-07-31	0.57
2015-08-31	0.57
2015-09-30	0.57
2015-10-31	0.57
2015-11-30	0.57
2015-12-31	0.57
2016-01-31	0.565
2016-02-29	0.565
2016-03-31	0.565
2016-04-30	0.565
2016-05-31	0.565
2016-06-30	0.55
2016-07-31	0.535
2016-08-31	0.36
2016-09-30	0.37
2016-10-31	0.38
2016-11-30	0.38
2016-12-31	0.37
2017-01-31	0.34
2017-02-28	0.34
2017-03-31	0.33
2017-04-30	0.33
2017-05-31	0.32
2017-06-30	0.32
2017-07-31	0.32
2017-08-31	0.31
2017-09-30	0.33
2017-10-31	0.4
2017-11-30	0.44