Month	Percent
2004-01-31	5.33
2004-02-29	5.41
2004-03-31	5.52
2004-04-30	5.62
2004-05-31	5.74
2004-06-30	5.9
2004-07-31	6.04
2004-08-31	6.1
2004-09-30	6.16
2004-10-31	6.28
2004-11-30	6.23
2004-12-31	6.26
2005-01-31	6.2
2005-02-28	6.15
2005-03-31	6.19
2005-04-30	6.2
2005-05-31	6.2
2005-06-30	6.34
2005-07-31	6.25
2005-08-31	6.13
2005-09-30	6.07
2005-10-31	6.01
2005-11-30	6.01
2005-12-31	6
2006-01-31	6.04
2006-02-28	5.98
2006-03-31	5.96
2006-04-30	5.98
2006-05-31	6.02
2006-06-30	6.01
2006-07-31	6.07
2006-08-31	6.14
2006-09-30	6.21
2006-10-31	6.31
2006-11-30	6.44
2006-12-31	6.61
2007-01-31	6.65
2007-02-28	6.78
2007-03-31	6.75
2007-04-30	6.86
2007-05-31	6.97
2007-06-30	7.05
2007-07-31	7.25
2007-08-31	7.43
2007-09-30	7.65
2007-10-31	7.66
2007-11-30	7.65
2007-12-31	7.69
2008-01-31	7.51
2008-02-29	7.21
2008-03-31	7.19
2008-04-30	7.21
2008-05-31	7.17
2008-06-30	7.19
2008-07-31	7.14
2008-08-31	7.13
2008-09-30	7.19
2008-10-31	7.41
2008-11-30	6.96
2008-12-31	6.06
2009-01-31	4.88
2009-02-28	4.14
2009-03-31	3.87
2009-04-30	3.46
2009-05-31	3.28
2009-06-30	3.13
2009-07-31	3.01
2009-08-31	2.91
2009-09-30	2.87
2009-10-31	2.74
2009-11-30	2.69
2009-12-31	2.71
2010-01-31	2.73
2010-02-28	2.75
2010-03-31	2.76
2010-04-30	2.81
2010-05-31	2.82
2010-06-30	2.85
2010-07-31	2.85
2010-08-31	2.86
2010-09-30	2.87
2010-10-31	2.87
2010-11-30	2.86
2010-12-31	2.88
2011-01-31	2.9
2011-02-28	2.91
2011-03-31	2.92
2011-04-30	2.89
2011-05-31	2.97
2011-06-30	2.93
2011-07-31	2.96
2011-08-31	2.96
2011-09-30	2.99
2011-10-31	3.04
2011-11-30	3.05
2011-12-31	3.06
2012-01-31	3.12
2012-02-29	3.14
2012-03-31	3.12
2012-04-30	3.11
2012-05-31	3.1
2012-06-30	3.1
2012-07-31	3.07
2012-08-31	3.03
2012-09-30	2.97
2012-10-31	2.87
2012-11-30	2.87
2012-12-31	2.86
2013-01-31	2.91
2013-02-28	2.82
2013-03-31	2.82
2013-04-30	2.83
2013-05-31	2.81
2013-06-30	2.77
2013-07-31	2.74
2013-08-31	2.75
2013-09-30	2.72
2013-10-31	2.69
2013-11-30	2.69
2013-12-31	2.65
2014-01-31	2.67
2014-02-28	2.65
2014-03-31	2.69
2014-04-30	2.68
2014-05-31	2.73
2014-06-30	2.7
2014-07-31	2.7
2014-08-31	2.71
2014-09-30	2.72
2014-10-31	2.74
2014-11-30	2.72
2014-12-31	2.73
2015-01-31	2.74
2015-02-28	2.75
2015-03-31	2.74
2015-04-30	2.73
2015-05-31	2.73
2015-06-30	2.75
2015-07-31	2.74
2015-08-31	2.75
2015-09-30	2.78
2015-10-31	2.76
2015-11-30	2.77
2015-12-31	2.78