Month	Percent
2004-01-31	5.68
2004-02-29	5.71
2004-03-31	5.91
2004-04-30	5.95
2004-05-31	6.08
2004-06-30	6.18
2004-07-31	6.19
2004-08-31	6.34
2004-09-30	6.37
2004-10-31	6.38
2004-11-30	6.32
2004-12-31	6.28
2005-01-31	6.27
2005-02-28	6.26
2005-03-31	6.23
2005-04-30	6.32
2005-05-31	6.3
2005-06-30	6.24
2005-07-31	6.18
2005-08-31	6.13
2005-09-30	6.18
2005-10-31	6.15
2005-11-30	6.12
2005-12-31	6.17
2006-01-31	6.08
2006-02-28	6.03
2006-03-31	6
2006-04-30	5.92
2006-05-31	5.86
2006-06-30	5.91
2006-07-31	5.87
2006-08-31	6.01
2006-09-30	6.03
2006-10-31	5.94
2006-11-30	6.05
2006-12-31	6.07
2007-01-31	6.25
2007-02-28	6.31
2007-03-31	6.39
2007-04-30	6.38
2007-05-31	6.35
2007-06-30	6.44
2007-07-31	6.58
2007-08-31	6.66
2007-09-30	6.85
2007-10-31	6.8
2007-11-30	6.79
2007-12-31	6.67
2008-01-31	6.66
2008-02-29	6.57
2008-03-31	6.51
2008-04-30	6.6
2008-05-31	6.4
2008-06-30	6.39
2008-07-31	6.37
2008-08-31	6.28
2008-09-30	6.37
2008-10-31	6.29
2008-11-30	5.89
2008-12-31	6
2009-01-31	5.53
2009-02-28	5.3
2009-03-31	5.2
2009-04-30	5.5
2009-05-31	5.28
2009-06-30	5.35
2009-07-31	5.29
2009-08-31	5.21
2009-09-30	5.17
2009-10-31	5.15
2009-11-30	5.13
2009-12-31	5.09
2010-01-31	5.27
2010-02-28	5.26
2010-03-31	5.23
2010-04-30	5.27
2010-05-31	5.11
2010-06-30	5.07
2010-07-31	4.85
2010-08-31	4.62
2010-09-30	4.64
2010-10-31	4.47
2010-11-30	4.53
2010-12-31	4.51
2011-01-31	4.55
2011-02-28	4.58
2011-03-31	4.53
2011-04-30	4.5
2011-05-31	4.58
2011-06-30	4.63
2011-07-31	4.62
2011-08-31	4.65
2011-09-30	4.59
2011-10-31	4.57
2011-11-30	4.48
2011-12-31	4.45
2012-01-31	4.5
2012-02-29	4.5
2012-03-31	4.48
2012-04-30	4.54
2012-05-31	4.54
2012-06-30	4.52
2012-07-31	4.47
2012-08-31	4.48
2012-09-30	4.26
2012-10-31	4.18
2012-11-30	4.15
2012-12-31	4.12
2013-01-31	4.17
2013-02-28	4.24
2013-03-31	4.27
2013-04-30	4.29
2013-05-31	4.29
2013-06-30	4.37
2013-07-31	4.41
2013-08-31	4.36
2013-09-30	4.36
2013-10-31	4.3
2013-11-30	4.32
2013-12-31	4.3
2014-01-31	4.24
2014-02-28	4.27
2014-03-31	4.25
2014-04-30	4.33
2014-05-31	4.31
2014-06-30	4.18
2014-07-31	4.2
2014-08-31	4.17
2014-09-30	4.11
2014-10-31	4.21
2014-11-30	4.15
2014-12-31	4.14
2015-01-31	4.13
2015-02-28	4.09
2015-03-31	4.07
2015-04-30	4.08
2015-05-31	4.04
2015-06-30	4.06
2015-07-31	4.13
2015-08-31	4.1
2015-09-30	4.09
2015-10-31	4.12
2015-11-30	4.08
2015-12-31	4.13