Month	Percent
2004-01-31	4.72
2004-02-29	4.66
2004-03-31	4.75
2004-04-30	4.81
2004-05-31	5.37
2004-06-30	4.93
2004-07-31	5.22
2004-08-31	5.44
2004-09-30	5.22
2004-10-31	5.16
2004-11-30	5.18
2004-12-31	5.3
2005-01-31	5.45
2005-02-28	5.39
2005-03-31	5.51
2005-04-30	5.57
2005-05-31	5.66
2005-06-30	5.97
2005-07-31	5.92
2005-08-31	5.82
2005-09-30	5.81
2005-10-31	5.81
2005-11-30	5.81
2005-12-31	5.81
2006-01-31	5.87
2006-02-28	5.99
2006-03-31	5.98
2006-04-30	6.03
2006-05-31	6.13
2006-06-30	6.19
2006-07-31	6.23
2006-08-31	6.26
2006-09-30	6.24
2006-10-31	6.19
2006-11-30	6.23
2006-12-31	6.14
2007-01-31	6
2007-02-28	6.09
2007-03-31	6.08
2007-04-30	6.06
2007-05-31	6.03
2007-06-30	6.06
2007-07-31	6.07
2007-08-31	6.11
2007-09-30	6.3
2007-10-31	6.43
2007-11-30	6.36
2007-12-31	6.45
2008-01-31	5.91
2008-02-29	6.02
2008-03-31	5.91
2008-04-30	5.95
2008-05-31	5.91
2008-06-30	6.04
2008-07-31	6.13
2008-08-31	6.19
2008-09-30	6.46
2008-10-31	6.42
2008-11-30	6.06
2008-12-31	5.59
2009-01-31	5.33
2009-02-28	5.14
2009-03-31	4.78
2009-04-30	4.7
2009-05-31	4.56
2009-06-30	4.51
2009-07-31	4.41
2009-08-31	4.45
2009-09-30	4.46
2009-10-31	4.37
2009-11-30	4.38
2009-12-31	4.34
2010-01-31	4.63
2010-02-28	4.76
2010-03-31	4.65
2010-04-30	4.63
2010-05-31	4.69
2010-06-30	4.68
2010-07-31	4.67
2010-08-31	4.34
2010-09-30	4.35
2010-10-31	4.33
2010-11-30	4.36
2010-12-31	4.4
2011-01-31	4.46
2011-02-28	4.46
2011-03-31	4.45
2011-04-30	4.41
2011-05-31	4.44
2011-06-30	4.48
2011-07-31	4.49
2011-08-31	4.47
2011-09-30	4.47
2011-10-31	4.45
2011-11-30	4.49
2011-12-31	4.48
2012-01-31	4.47
2012-02-29	4.47
2012-03-31	4.44
2012-04-30	4.32
2012-05-31	4.45
2012-06-30	4.47
2012-07-31	4.45
2012-08-31	4.44
2012-09-30	4.41
2012-10-31	4.37
2012-11-30	4.37
2012-12-31	4.38
2013-01-31	4.38
2013-02-28	4.37
2013-03-31	4.39
2013-04-30	4.43
2013-05-31	4.34
2013-06-30	4.22
2013-07-31	4.19
2013-08-31	4.19
2013-09-30	4.2
2013-10-31	4.2
2013-11-30	4.17
2013-12-31	4.12
2014-01-31	4.15
2014-02-28	4.14
2014-03-31	4.13
2014-04-30	4.11
2014-05-31	4.09
2014-06-30	4.09
2014-07-31	4.09
2014-08-31	4.08
2014-09-30	4.07
2014-10-31	4.05
2014-11-30	4.03
2014-12-31	3.99
2015-01-31	4
2015-02-28	3.99
2015-03-31	4
2015-04-30	3.98
2015-05-31	3.93
2015-06-30	3.96
2015-07-31	3.95
2015-08-31	3.97
2015-09-30	3.98
2015-10-31	3.98
2015-11-30	4.07
2015-12-31	4.25