Month	Percent
1978-01-31	6.845
1978-02-28	7.755
1978-03-31	7.44
1978-04-30	8.905
1978-05-31	9.97
1978-06-30	10.435
1978-07-31	10.005
1978-08-31	9.625
1978-09-30	10.065
1978-10-31	11.505
1978-11-30	12.035
1978-12-31	12.625
1979-01-31	13.285
1979-02-28	11.72
1979-03-31	11.535
1979-04-30	11.345
1979-05-31	11.75
1979-06-30	13.435
1979-07-31	13.97
1979-08-31	13.815
1979-09-30	13.94
1979-10-31	14.69
1979-11-30	16.565
1979-12-31	16.565
1980-01-31	16.72
1980-02-29	17.755
1980-03-31	18.095
1980-04-30	16.19
1980-05-31	16.285
1980-06-30	15.815
1980-07-31	14.595
1980-08-31	16.22
1980-09-30	15.22
1980-10-31	15.97
1980-11-30	14.285
1980-12-31	14.47
1981-01-31	13.125
1981-02-28	12.255
1981-03-31	12.44
1981-04-30	12.405
1981-05-31	12.72
1981-06-30	12.875
1981-07-31	14.72
1981-08-31	14.22
1981-09-30	16.935
1981-10-31	16.375
1981-11-30	14.655
1981-12-31	15.72
1982-01-31	14.505
1982-02-28	14.035
1982-03-31	13.625
1982-04-30	13.755
1982-05-31	13.375
1982-06-30	13.125
1982-07-31	11.94
1982-08-31	10.875
1982-09-30	10.565
1982-10-31	9.565
1982-11-30	10.375
1982-12-31	10.44
1983-01-31	11.685
1983-02-28	11.315
1983-03-31	10.875
1983-04-30	10.25
1983-05-31	10.47
1983-06-30	10.065
1983-07-31	10.5
1983-08-31	10.25
1983-09-30	9.75
1983-10-31	9.56
1983-11-30	9.625
1983-12-31	9.695
1984-01-31	9.755
1984-02-29	9.445
1984-03-31	9.255
1984-04-30	9.25
1984-05-31	10.59
1984-06-30	10.565
1984-07-31	12.44
1984-08-31	10.87
1984-09-30	10.81
1984-10-31	10.69
1984-11-30	10.005
1984-12-31	10.22
1985-01-31	12.375
1985-02-28	13.065
1985-03-31	12.375
1985-04-30	12.375
1985-05-31	12.41
1985-06-30	12.315
1985-07-31	10.94
1985-08-31	11.25
1985-09-30	11.19
1985-10-31	11.5
1985-11-30	11.375
1985-12-31	11.91
1986-01-31	12.815
1986-02-28	11.815
1986-03-31	10.78
1986-04-30	9.94
1986-05-31	9.625
1986-06-30	9.66
1986-07-31	9.94
1986-08-31	9.69
1986-09-30	11.375
1986-10-31	11.19
1986-11-30	11.44
1986-12-31	11.19
1987-01-31	10.875
1987-02-28	10.44
1987-03-31	9.75
1987-04-30	9.25
1987-05-31	8.97
1987-06-30	9.25
1987-07-31	9.63
1987-08-31	10.69
1987-09-30	10.375
1987-10-31	9.065
1987-11-30	9
1987-12-31	9.065
1988-01-31	8.94
1988-02-29	9.47
1988-03-31	8.815
1988-04-30	8.815
1988-05-31	8.125
1988-06-30	10
1988-07-31	10.91
1988-08-31	12.25
1988-09-30	11.785
1988-10-31	12.03
1988-11-30	12.22
1988-12-31	13.095
1989-01-31	12.795
1989-02-28	13.375
1989-03-31	13.03
1989-04-30	12.91
1989-05-31	14.28
1989-06-30	14.28
1989-07-31	13.66
1989-08-31	13.91
1989-09-30	14.66
1989-10-31	15.125
1989-11-30	15.095
1989-12-31	15.09
1990-01-31	15.0313
1990-02-28	15.16
1990-03-31	15.41
1990-04-30	15.575
1990-05-31	15.19
1990-06-30	14.94
1990-07-31	14.91
1990-08-31	14.91
1990-09-30	14.91
1990-10-31	13.345
1990-11-30	12.91
1990-12-31	13.375
1991-01-31	13.38
1991-02-28	12.16
1991-03-31	11.91
1991-04-30	11.53
1991-05-31	11.16
1991-06-30	11.03
1991-07-31	10.97
1991-08-31	10.61
1991-09-30	10.16
1991-10-31	10.33
1991-11-30	10.545
1991-12-31	10.97
1992-01-31	10.41
1992-02-29	10.175
1992-03-31	10.985
1992-04-30	10.53
1992-05-31	9.955
1992-06-30	10.09
1992-07-31	10.38
1992-08-31	10.72
1992-09-30	8.81
1992-10-31	7
1992-11-30	7.03
1992-12-31	6.88
1993-01-31	6.065
1993-02-28	5.925
1993-03-31	5.88
1993-04-30	6.16
1993-05-31	5.91
1993-06-30	5.925
1993-07-31	5.72
1993-08-31	5.72
1993-09-30	5.83
1993-10-31	5.5
1993-11-30	5.295
1993-12-31	5.265
1994-01-31	5.28
1994-02-28	5.175
1994-03-31	5.47
1994-04-30	5.375
1994-05-31	5.44
1994-06-30	5.455
1994-07-31	5.72
1994-08-31	5.985
1994-09-30	6.44
1994-10-31	6.455
1994-11-30	6.66
1994-12-31	7.075
1995-01-31	7.075
1995-02-28	7.11
1995-03-31	6.97
1995-04-30	7.125
1995-05-31	6.825
1995-06-30	7.11
1995-07-31	6.91
1995-08-31	6.81
1995-09-30	6.78
1995-10-31	6.72
1995-11-30	6.375
1995-12-31	6.345
1996-01-31	6.11
1996-02-29	6.045
1996-03-31	6.13
1996-04-30	6.045
1996-05-31	6.13
1996-06-30	5.795
1996-07-31	5.765
1996-08-31	5.72
1996-09-30	5.955
1996-10-31	6.325
1996-11-30	6.515
1996-12-31	6.66
1997-01-31	6.375
1997-02-28	6.325
1997-03-31	6.56
1997-04-30	6.675
1997-05-31	6.72
1997-06-30	6.97
1997-07-31	7.235
1997-08-31	7.41
1997-09-30	7.3594
1997-10-31	7.375
1997-11-30	7.72
1997-12-31	7.595
1998-01-31	7.44
1998-02-28	7.485
1998-03-31	7.5313
1998-04-30	7.375
1998-05-31	7.4219
1998-06-30	7.8594
1998-07-31	7.72
1998-08-31	7.515
1998-09-30	7.125
1998-10-31	6.825
1998-11-30	6.545
1998-12-31	5.825
1999-01-31	5.53
1999-02-28	5.265
1999-03-31	5.125
1999-04-30	5.22
1999-05-31	5.235
1999-06-30	5.16
1999-07-31	5.455
1999-08-31	5.485
1999-09-30	5.895
1999-10-31	6.045
1999-11-30	6.06
1999-12-31	6.2188
2000-01-31	6.3438
2000-02-29	6.3594
2000-03-31	6.3751
2000-04-30	6.4063
2000-05-31	6.3282
2000-06-30	6.2657
2000-07-31	6.2813
2000-08-31	6.2969
2000-09-30	6.2032
2000-10-31	6.125
2000-11-30	5.9532
2000-12-31	5.7813
2001-01-31	5.5782
2001-02-28	5.4376
2001-03-31	5.2813
2001-04-30	5.1719
2001-05-31	5.1876
2001-06-30	5.3438
2001-07-31	5.1876
2001-08-31	4.8594
2001-09-30	4.3907
2001-10-31	4.1563
2001-11-30	3.9688
2001-12-31	4.0469
2002-01-31	4.125
2002-02-28	4.125
2002-03-31	4.3438
2002-04-30	4.2344
2002-05-31	4.3438
2002-06-30	4.25
2002-07-31	4.0156
2002-08-31	3.9844
2002-09-30	3.875
2002-10-31	3.875
2002-11-30	4.015
2002-12-31	3.915
2003-01-31	3.85
2003-02-28	3.525
2003-03-31	3.53
2003-04-30	3.49
2003-05-31	3.48
2003-06-30	3.515
2003-07-31	3.395
2003-08-31	3.63
2003-09-30	3.765
2003-10-31	4.06
2003-11-30	4.14
2003-12-31	4.11
2004-01-31	4.23
2004-02-29	4.265
2004-03-31	4.47
2004-04-30	4.535
2004-05-31	4.795
2004-06-30	4.98
2004-07-31	5.05
2004-08-31	5.015
2004-09-30	4.935
2004-10-31	4.9
2004-11-30	4.815
2004-12-31	4.85
2005-01-31	4.835
2005-02-28	4.99
2005-03-31	4.965
2005-04-30	4.895
2005-05-31	4.8
2005-06-30	4.645
2005-07-31	4.475
2005-08-31	4.475
2005-09-30	4.505
2005-10-31	4.555
2005-11-30	4.565
2005-12-31	4.53
2006-01-31	4.55
2006-02-28	4.535
2006-03-31	4.6
2006-04-30	4.66
2006-05-31	4.725
2006-06-30	4.76
2006-07-31	4.805
2006-08-31	5.045
2006-09-30	5.14
2006-10-31	5.255
2006-11-30	5.28
2006-12-31	5.385
2007-01-31	5.665
2007-02-28	5.585
2007-03-31	5.675
2007-04-30	5.785
2007-05-31	5.905
2007-06-30	6.075
2007-07-31	6.105
2007-08-31	6.54
2007-09-30	6.25
2007-10-31	6.17
2007-11-30	6.3
2007-12-31	5.86
2008-01-31	5.495
2008-02-29	5.65
2008-03-31	5.955
2008-04-30	5.82
2008-05-31	5.95
2008-06-30	6.11
2008-07-31	5.945
2008-08-31	5.865
2008-09-30	6.325
2008-10-31	5.975
2008-11-30	4.1
2008-12-31	3
2009-01-31	2.275
2009-02-28	2.2
2009-03-31	1.85
2009-04-30	1.625
2009-05-31	1.45
2009-06-30	1.425
2009-07-31	1.15
2009-08-31	0.925
2009-09-30	0.75
2009-10-31	0.825
2009-11-30	0.825
2009-12-31	0.825
2010-01-31	0.845
2010-02-28	0.825
2010-03-31	0.85
2010-04-30	0.85
2010-05-31	0.95
2010-06-30	1.02
2010-07-31	1.02
2010-08-31	1.02
2010-09-30	1.02
2010-10-31	1.04
2010-11-30	1.04
2010-12-31	1.045
2011-01-31	1.025
2011-02-28	1.08
2011-03-31	1.1
2011-04-30	1.085
2011-05-31	1.065
2011-06-30	1.13
2011-07-31	1.13
2011-08-31	1.21
2011-09-30	1.275
2011-10-31	1.305
2011-11-30	1.375
2011-12-31	1.395
2012-01-31	1.41
2012-02-29	1.395
2012-03-31	1.37
2012-04-30	1.335
2012-05-31	1.305
2012-06-30	1.195
2012-07-31	1.1
2012-08-31	0.91
2012-09-30	0.85
2012-10-31	0.7
2012-11-30	0.675
2012-12-31	0.665
2013-01-31	0.645
2013-02-28	0.635
2013-03-31	0.59
2013-04-30	0.565
2013-05-31	0.565
2013-06-30	0.575
2013-07-31	0.575
2013-08-31	0.575
2013-09-30	0.585
2013-10-31	0.585
2013-11-30	0.62
2013-12-31	0.585
2014-01-31	0.59
2014-02-28	0.595
2014-03-31	0.605
2014-04-30	0.665
2014-05-31	0.665
2014-06-30	0.675
2014-07-31	0.675
2014-08-31	0.67
2014-09-30	0.685
2014-10-31	0.675
2014-11-30	0.675
2014-12-31	0.675
2015-01-31	0.665
2015-02-28	0.675
2015-03-31	0.675
2015-04-30	0.68
2015-05-31	0.68
2015-06-30	0.79
2015-07-31	0.79
2015-08-31	0.79
2015-09-30	0.79
2015-10-31	0.79
2015-11-30	0.79
2015-12-31	0.79
2016-01-31	0.79
2016-02-29	0.79
2016-03-31	0.79
2016-04-30	0.79
2016-05-31	0.79
2016-06-30	0.785
2016-07-31	0.695
2016-08-31	0.54
2016-09-30	0.55
2016-10-31	0.565
2016-11-30	0.565
2016-12-31	0.565
2017-01-31	0.535
2017-02-28	0.51
2017-03-31	0.505
2017-04-30	0.5
2017-05-31	0.49
2017-06-30	0.49
2017-07-31	0.49
2017-08-31	0.485
2017-09-30	0.52
2017-10-31	0.565
2017-11-30	0.585