Month	Percent
2004-01-31	4.71
2004-02-29	4.82
2004-03-31	4.95
2004-04-30	4.89
2004-05-31	4.99
2004-06-30	5.09
2004-07-31	5.15
2004-08-31	5.29
2004-09-30	5.38
2004-10-31	5.37
2004-11-30	5.35
2004-12-31	5.35
2005-01-31	5.32
2005-02-28	5.29
2005-03-31	5.3
2005-04-30	5.3
2005-05-31	5.3
2005-06-30	5.28
2005-07-31	5.17
2005-08-31	4.99
2005-09-30	4.82
2005-10-31	4.75
2005-11-30	4.71
2005-12-31	4.72
2006-01-31	4.8
2006-02-28	4.86
2006-03-31	4.87
2006-04-30	4.87
2006-05-31	4.86
2006-06-30	4.89
2006-07-31	4.96
2006-08-31	5.08
2006-09-30	5.15
2006-10-31	5.18
2006-11-30	5.14
2006-12-31	5.11
2007-01-31	5.17
2007-02-28	5.25
2007-03-31	5.3
2007-04-30	5.35
2007-05-31	5.39
2007-06-30	5.44
2007-07-31	5.55
2007-08-31	5.72
2007-09-30	5.87
2007-10-31	5.94
2007-11-30	5.98
2007-12-31	5.94
2008-01-31	5.92
2008-02-29	5.87
2008-03-31	5.76
2008-04-30	5.74
2008-05-31	5.79
2008-06-30	5.94
2008-07-31	6.05
2008-08-31	6.11
2008-09-30	6.2
2008-10-31	6.05
2008-11-30	5.97
2008-12-31	5.61
2009-01-31	5.2
2009-02-28	5.07
2009-03-31	4.82
2009-04-30	4.76
2009-05-31	4.68
2009-06-30	4.54
2009-07-31	4.58
2009-08-31	4.68
2009-09-30	4.73
2009-10-31	4.81
2009-11-30	4.9
2009-12-31	4.84
2010-01-31	4.76
2010-02-28	4.68
2010-03-31	4.73
2010-04-30	4.71
2010-05-31	4.6
2010-06-30	4.55
2010-07-31	4.51
2010-08-31	4.41
2010-09-30	4.39
2010-10-31	4.32
2010-11-30	4.28
2010-12-31	4.22
2011-01-31	4.11
2011-02-28	4.09
2011-03-31	4.18
2011-04-30	4.31
2011-05-31	4.35
2011-06-30	4.39
2011-07-31	4.27
2011-08-31	4.13
2011-09-30	3.97
2011-10-31	3.87
2011-11-30	3.69
2011-12-31	3.75
2012-01-31	3.7
2012-02-29	3.82
2012-03-31	3.97
2012-04-30	3.96
2012-05-31	4.03
2012-06-30	4.16
2012-07-31	4.21
2012-08-31	4.23
2012-09-30	4.09
2012-10-31	3.99
2012-11-30	3.93
2012-12-31	3.81
2013-01-31	3.64
2013-02-28	3.58
2013-03-31	3.5
2013-04-30	3.38
2013-05-31	3.35
2013-06-30	3.31
2013-07-31	3.24
2013-08-31	3.24
2013-09-30	3.14
2013-10-31	3.09
2013-11-30	3.1
2013-12-31	3.12
2014-01-31	3.07
2014-02-28	3.12
2014-03-31	3.15
2014-04-30	3.15
2014-05-31	3.21
2014-06-30	3.21
2014-07-31	3.3
2014-08-31	3.31
2014-09-30	3.32
2014-10-31	3.29
2014-11-30	3.21
2014-12-31	3.12
2015-01-31	2.94
2015-02-28	2.92
2015-03-31	2.81
2015-04-30	2.76
2015-05-31	2.71
2015-06-30	2.65
2015-07-31	2.66
2015-08-31	2.65
2015-09-30	2.63
2015-10-31	2.58
2015-11-30	2.6
2015-12-31	2.59