Month	Percent
1978-01-31	7.44
1978-02-28	8.255
1978-03-31	8.285
1978-04-30	9.255
1978-05-31	10.22
1978-06-30	10.535
1978-07-31	10.065
1978-08-31	9.875
1978-09-30	10.19
1978-10-31	11.47
1978-11-30	11.815
1978-12-31	12.285
1979-01-31	12.94
1979-02-28	11.685
1979-03-31	11.095
1979-04-30	11.095
1979-05-31	11.535
1979-06-30	12.72
1979-07-31	13.065
1979-08-31	12.94
1979-09-30	13.19
1979-10-31	14.125
1979-11-30	15.375
1979-12-31	15.22
1980-01-31	15.595
1980-02-29	16.75
1980-03-31	17.38
1980-04-30	15.16
1980-05-31	14.905
1980-06-30	14.375
1980-07-31	13.44
1980-08-31	15.22
1980-09-30	14.25
1980-10-31	14.69
1980-11-30	13.845
1980-12-31	14.095
1981-01-31	12.94
1981-02-28	12.16
1981-03-31	12.315
1981-04-30	12.405
1981-05-31	12.875
1981-06-30	13.22
1981-07-31	14.595
1981-08-31	14.285
1981-09-30	16.345
1981-10-31	16.095
1981-11-30	14.44
1981-12-31	15.405
1982-01-31	14.535
1982-02-28	14.035
1982-03-31	13.625
1982-04-30	13.785
1982-05-31	13.375
1982-06-30	13.19
1982-07-31	12
1982-08-31	10.875
1982-09-30	10.565
1982-10-31	9.47
1982-11-30	10.345
1982-12-31	10.44
1983-01-31	11.625
1983-02-28	11.06
1983-03-31	10.81
1983-04-30	10.31
1983-05-31	10.5
1983-06-30	10.255
1983-07-31	10.755
1983-08-31	10.695
1983-09-30	9.94
1983-10-31	9.87
1983-11-30	9.94
1983-12-31	10
1984-01-31	10.125
1984-02-29	9.625
1984-03-31	9.5
1984-04-30	9.565
1984-05-31	11.06
1984-06-30	10.755
1984-07-31	12.25
1984-08-31	10.945
1984-09-30	10.94
1984-10-31	10.69
1984-11-30	10.12
1984-12-31	10.44
1985-01-31	12.005
1985-02-28	12.69
1985-03-31	11.94
1985-04-30	12.125
1985-05-31	12.19
1985-06-30	12.065
1985-07-31	10.875
1985-08-31	11.065
1985-09-30	11
1985-10-31	11.25
1985-11-30	11.19
1985-12-31	11.69
1986-01-31	12.625
1986-02-28	11.565
1986-03-31	10.44
1986-04-30	9.565
1986-05-31	9.44
1986-06-30	9.66
1986-07-31	9.97
1986-08-31	9.625
1986-09-30	11.375
1986-10-31	11.19
1986-11-30	11.47
1986-12-31	11.125
1987-01-31	10.815
1987-02-28	10.315
1987-03-31	9.625
1987-04-30	9.19
1987-05-31	9.16
1987-06-30	9.44
1987-07-31	9.94
1987-08-31	10.94
1987-09-30	10.565
1987-10-31	9.125
1987-11-30	9.125
1987-12-31	9.315
1988-01-31	9.28
1988-02-29	9.75
1988-03-31	9.125
1988-04-30	9.22
1988-05-31	8.78
1988-06-30	10.19
1988-07-31	10.94
1988-08-31	12.25
1988-09-30	11.815
1988-10-31	11.75
1988-11-30	12.94
1988-12-31	12.875
1989-01-31	12.5
1989-02-28	13.25
1989-03-31	12.91
1989-04-30	12.875
1989-05-31	14.125
1989-06-30	14.125
1989-07-31	13.315
1989-08-31	13.53
1989-09-30	14.375
1989-10-31	14.625
1989-11-30	14.69
1989-12-31	14.66
1990-01-31	14.9063
1990-02-28	15.25
1990-03-31	15.53
1990-04-30	15.94
1990-05-31	15.095
1990-06-30	14.625
1990-07-31	14.5
1990-08-31	14.565
1990-09-30	14.5
1990-10-31	12.815
1990-11-30	12.41
1990-12-31	12.845
1991-01-31	12.815
1991-02-28	11.69
1991-03-31	11.565
1991-04-30	11.325
1991-05-31	11.015
1991-06-30	10.875
1991-07-31	10.91
1991-08-31	10.595
1991-09-30	10.095
1991-10-31	10.25
1991-11-30	10.53
1991-12-31	10.91
1992-01-31	10.295
1992-02-29	10.075
1992-03-31	11
1992-04-30	10.375
1992-05-31	9.895
1992-06-30	10.015
1992-07-31	10.315
1992-08-31	10.78
1992-09-30	8.47
1992-10-31	6.625
1992-11-30	6.78
1992-12-31	6.78
1993-01-31	5.97
1993-02-28	5.72
1993-03-31	5.845
1993-04-30	6.31
1993-05-31	6.03
1993-06-30	5.925
1993-07-31	5.66
1993-08-31	5.63
1993-09-30	5.72
1993-10-31	5.455
1993-11-30	5.28
1993-12-31	5.13
1994-01-31	5.235
1994-02-28	5.25
1994-03-31	5.735
1994-04-30	5.845
1994-05-31	6
1994-06-30	6.145
1994-07-31	6.41
1994-08-31	6.845
1994-09-30	7.395
1994-10-31	7.28
1994-11-30	7.375
1994-12-31	7.91
1995-01-31	7.765
1995-02-28	7.75
1995-03-31	7.53
1995-04-30	7.72
1995-05-31	7.16
1995-06-30	7.485
1995-07-31	7.11
1995-08-31	6.875
1995-09-30	6.795
1995-10-31	6.735
1995-11-30	6.31
1995-12-31	6.295
1996-01-31	6.095
1996-02-29	6.175
1996-03-31	6.375
1996-04-30	6.295
1996-05-31	6.41
1996-06-30	6.045
1996-07-31	6.015
1996-08-31	5.94
1996-09-30	6.19
1996-10-31	6.63
1996-11-30	6.875
1996-12-31	6.94
1997-01-31	6.705
1997-02-28	6.61
1997-03-31	6.925
1997-04-30	6.985
1997-05-31	7
1997-06-30	7.235
1997-07-31	7.425
1997-08-31	7.575
1997-09-30	7.5156
1997-10-31	7.47
1997-11-30	7.78
1997-12-31	7.61
1998-01-31	7.395
1998-02-28	7.485
1998-03-31	7.5156
1998-04-30	7.345
1998-05-31	7.4063
1998-06-30	7.9531
1998-07-31	7.75
1998-08-31	7.34
1998-09-30	6.86
1998-10-31	6.455
1998-11-30	6.235
1998-12-31	5.515
1999-01-31	5.425
1999-02-28	5.265
1999-03-31	5.16
1999-04-30	5.28
1999-05-31	5.36
1999-06-30	5.41
1999-07-31	5.75
1999-08-31	5.825
1999-09-30	6.265
1999-10-31	6.425
1999-11-30	6.47
1999-12-31	6.625
2000-01-31	6.7813
2000-02-29	6.6719
2000-03-31	6.7344
2000-04-30	6.6407
2000-05-31	6.6094
2000-06-30	6.4376
2000-07-31	6.4532
2000-08-31	6.4844
2000-09-30	6.2188
2000-10-31	6.2188
2000-11-30	5.9532
2000-12-31	5.7188
2001-01-31	5.5157
2001-02-28	5.3751
2001-03-31	5.1876
2001-04-30	5.1407
2001-05-31	5.2969
2001-06-30	5.6407
2001-07-31	5.3126
2001-08-31	4.9844
2001-09-30	4.4532
2001-10-31	4.1094
2001-11-30	4.1875
2001-12-31	4.4063
2002-01-31	4.5313
2002-02-28	4.4375
2002-03-31	4.7813
2002-04-30	4.6094
2002-05-31	4.7656
2002-06-30	4.6094
2002-07-31	4.2188
2002-08-31	4.0938
2002-09-30	3.8906
2002-10-31	3.9063
2002-11-30	4.23
2002-12-31	3.925
2003-01-31	3.825
2003-02-28	3.465
2003-03-31	3.515
2003-04-30	3.475
2003-05-31	3.44
2003-06-30	3.51
2003-07-31	3.51
2003-08-31	3.9
2003-09-30	3.97
2003-10-31	4.445
2003-11-30	4.53
2003-12-31	4.375
2004-01-31	4.525
2004-02-29	4.485
2004-03-31	4.7
2004-04-30	4.82
2004-05-31	5.13
2004-06-30	5.225
2004-07-31	5.32
2004-08-31	5.17
2004-09-30	5.03
2004-10-31	4.96
2004-11-30	4.83
2004-12-31	4.87
2005-01-31	4.915
2005-02-28	5.11
2005-03-31	5.05
2005-04-30	4.915
2005-05-31	4.74
2005-06-30	4.52
2005-07-31	4.42
2005-08-31	4.43
2005-09-30	4.47
2005-10-31	4.605
2005-11-30	4.595
2005-12-31	4.5
2006-01-31	4.625
2006-02-28	4.605
2006-03-31	4.725
2006-04-30	4.8
2006-05-31	4.88
2006-06-30	4.945
2006-07-31	4.965
2006-08-31	5.19
2006-09-30	5.235
2006-10-31	5.395
2006-11-30	5.385
2006-12-31	5.54
2007-01-31	5.82
2007-02-28	5.685
2007-03-31	5.82
2007-04-30	5.93
2007-05-31	6.105
2007-06-30	6.27
2007-07-31	6.245
2007-08-31	6.49
2007-09-30	6.14
2007-10-31	6.06
2007-11-30	5.97
2007-12-31	5.66
2008-01-31	5.325
2008-02-29	5.52
2008-03-31	5.795
2008-04-30	5.795
2008-05-31	6.11
2008-06-30	6.405
2008-07-31	6.14
2008-08-31	5.975
2008-09-30	6.425
2008-10-31	5.975
2008-11-30	4.125
2008-12-31	3.1
2009-01-31	2.4
2009-02-28	2.35
2009-03-31	2.05
2009-04-30	1.875
2009-05-31	1.775
2009-06-30	1.75
2009-07-31	1.625
2009-08-31	1.225
2009-09-30	1.15
2009-10-31	1.225
2009-11-30	1.25
2009-12-31	1.375
2010-01-31	1.3
2010-02-28	1.3
2010-03-31	1.305
2010-04-30	1.325
2010-05-31	1.4
2010-06-30	1.475
2010-07-31	1.475
2010-08-31	1.475
2010-09-30	1.475
2010-10-31	1.475
2010-11-30	1.475
2010-12-31	1.5
2011-01-31	1.5
2011-02-28	1.525
2011-03-31	1.575
2011-04-30	1.55
2011-05-31	1.525
2011-06-30	1.575
2011-07-31	1.575
2011-08-31	1.695
2011-09-30	1.77
2011-10-31	1.8
2011-11-30	1.865
2011-12-31	1.885
2012-01-31	1.94
2012-02-29	1.925
2012-03-31	1.89
2012-04-30	1.865
2012-05-31	1.835
2012-06-30	1.72
2012-07-31	1.6
2012-08-31	1.38
2012-09-30	1.31
2012-10-31	1.09
2012-11-30	1.04
2012-12-31	1.01
2013-01-31	0.93
2013-02-28	0.93
2013-03-31	0.87
2013-04-30	0.83
2013-05-31	0.83
2013-06-30	0.85
2013-07-31	0.845
2013-08-31	0.845
2013-09-30	0.865
2013-10-31	0.865
2013-11-30	0.895
2013-12-31	0.825
2014-01-31	0.835
2014-02-28	0.865
2014-03-31	0.87
2014-04-30	0.935
2014-05-31	0.955
2014-06-30	0.975
2014-07-31	1.01
2014-08-31	1.05
2014-09-30	1.085
2014-10-31	1.04
2014-11-30	1.035
2014-12-31	1.035
2015-01-31	1.025
2015-02-28	1.045
2015-03-31	1.05
2015-04-30	1.05
2015-05-31	1.05
2015-06-30	1.05
2015-07-31	1.065
2015-08-31	1.065
2015-09-30	1.065
2015-10-31	1.05
2015-11-30	1.055
2015-12-31	1.06
2016-01-31	1.04
2016-02-29	1.015
2016-03-31	1.015
2016-04-30	1.025
2016-05-31	1.015
2016-06-30	0.95
2016-07-31	0.895
2016-08-31	0.72
2016-09-30	0.74
2016-10-31	0.79
2016-11-30	0.79
2016-12-31	0.78
2017-01-31	0.75
2017-02-28	0.705
2017-03-31	0.69
2017-04-30	0.68
2017-05-31	0.65
2017-06-30	0.665
2017-07-31	0.655
2017-08-31	0.64
2017-09-30	0.705
2017-10-31	0.765
2017-11-30	0.775