Month	Percent
2004-01-31	5.64
2004-02-29	5.66
2004-03-31	5.66
2004-04-30	5.65
2004-05-31	5.65
2004-06-30	5.73
2004-07-31	5.71
2004-08-31	5.69
2004-09-30	5.69
2004-10-31	5.69
2004-11-30	5.72
2004-12-31	5.71
2005-01-31	5.7
2005-02-28	5.7
2005-03-31	5.72
2005-04-30	5.68
2005-05-31	5.65
2005-06-30	5.63
2005-07-31	5.62
2005-08-31	5.58
2005-09-30	5.57
2005-10-31	5.55
2005-11-30	5.53
2005-12-31	5.51
2006-01-31	5.47
2006-02-28	5.47
2006-03-31	5.43
2006-04-30	5.44
2006-05-31	5.39
2006-06-30	5.41
2006-07-31	5.4
2006-08-31	5.39
2006-09-30	5.4
2006-10-31	5.38
2006-11-30	5.39
2006-12-31	5.38
2007-01-31	5.37
2007-02-28	5.4
2007-03-31	5.38
2007-04-30	5.39
2007-05-31	5.4
2007-06-30	5.49
2007-07-31	5.44
2007-08-31	5.47
2007-09-30	5.44
2007-10-31	5.43
2007-11-30	5.47
2007-12-31	5.5
2008-01-31	5.53
2008-02-29	5.52
2008-03-31	5.55
2008-04-30	5.53
2008-05-31	5.55
2008-06-30	5.55
2008-07-31	5.58
2008-08-31	5.58
2008-09-30	5.58
2008-10-31	5.64
2008-11-30	5.68
2008-12-31	5.68
2009-01-31	5.68
2009-02-28	5.68
2009-03-31	5.68
2009-04-30	5.68
2009-05-31	5.66
2009-06-30	5.67
2009-07-31	5.66
2009-08-31	5.65
2009-09-30	5.65
2009-10-31	5.65
2009-11-30	5.65
2009-12-31	5.65
2010-01-31	5.59
2010-02-28	5.59
2010-03-31	5.58
2010-04-30	5.6
2010-05-31	5.58
2010-06-30	5.58
2010-07-31	5.58
2010-08-31	5.59
2010-09-30	5.59
2010-10-31	5.59
2010-11-30	5.6
2010-12-31	5.59
2011-01-31	5.54
2011-02-28	5.54
2011-03-31	5.53
2011-04-30	5.54
2011-05-31	5.52
2011-06-30	5.52
2011-07-31	5.53
2011-08-31	5.53
2011-09-30	5.52
2011-10-31	5.52
2011-11-30	5.51
2011-12-31	5.5
2012-01-31	5.48
2012-02-29	5.47
2012-03-31	5.45
2012-04-30	5.45
2012-05-31	5.46
2012-06-30	5.45
2012-07-31	5.44
2012-08-31	5.42
2012-09-30	5.39
2012-10-31	5.34
2012-11-30	5.32
2012-12-31	5.3
2013-01-31	5.42
2013-02-28	5.43
2013-03-31	5.42
2013-04-30	5.42
2013-05-31	5.42
2013-06-30	5.42
2013-07-31	5.41
2013-08-31	5.4
2013-09-30	5.46
2013-10-31	5.44
2013-11-30	5.44
2013-12-31	5.43
2014-01-31	5.44
2014-02-28	5.4
2014-03-31	5.38
2014-04-30	5.38
2014-05-31	5.37
2014-06-30	5.36
2014-07-31	5.35
2014-08-31	5.33
2014-09-30	5.31
2014-10-31	5.3
2014-11-30	5.28
2014-12-31	5.27
2015-01-31	5.26
2015-02-28	5.22
2015-03-31	5.17
2015-04-30	5.1
2015-05-31	5.04
2015-06-30	4.97
2015-07-31	4.9
2015-08-31	4.84
2015-09-30	4.78
2015-10-31	4.71
2015-11-30	4.67
2015-12-31	4.63