Month	Percent
1999-01-31	9.06
1999-02-28	8.92
1999-03-31	8.53
1999-04-30	8.44
1999-05-31	8.45
1999-06-30	8.32
1999-07-31	8.38
1999-08-31	8.41
1999-09-30	8.47
1999-10-31	8.49
1999-11-30	8.6
1999-12-31	8.54
2000-01-31	8.56
2000-02-29	8.84
2000-03-31	8.84
2000-04-30	9.19
2000-05-31	9.19
2000-06-30	9.39
2000-07-31	9.38
2000-08-31	9.42
2000-09-30	9.21
2000-10-31	9.25
2000-11-30	9.18
2000-12-31	9.19
2001-01-31	9.07
2001-02-28	9
2001-03-31	9.02
2001-04-30	8.93
2001-05-31	8.72
2001-06-30	8.8
2001-07-31	8.8
2001-08-31	8.65
2001-09-30	8.53
2001-10-31	8.33
2001-11-30	8.02
2001-12-31	7.92
2002-01-31	7.99
2002-02-28	7.98
2002-03-31	7.99
2002-04-30	8
2002-05-31	7.88
2002-06-30	7.75
2002-07-31	7.85
2002-08-31	7.87
2002-09-30	7.84
2002-10-31	7.72
2002-11-30	7.77
2002-12-31	7.79
2003-01-31	7.77
2003-02-28	7.55
2003-03-31	7.47
2003-04-30	7.43
2003-05-31	7.53
2003-06-30	7.39
2003-07-31	7.28
2003-08-31	7.2
2003-09-30	7.26
2003-10-31	7.24
2003-11-30	7.38
2003-12-31	7.48
2004-01-31	6.55
2004-02-29	6.33
2004-03-31	6.38
2004-04-30	6.39
2004-05-31	6.58
2004-06-30	6.77
2004-07-31	6.9
2004-08-31	7.11
2004-09-30	7.23
2004-10-31	7.32
2004-11-30	7.33
2004-12-31	7.36
2005-01-31	7.35
2005-02-28	7.34
2005-03-31	7.32
2005-04-30	7.32
2005-05-31	7.34
2005-06-30	7.3
2005-07-31	7.3
2005-08-31	7.04
2005-09-30	7.05
2005-10-31	6.95
2005-11-30	7
2005-12-31	6.97
2006-01-31	6.93
2006-02-28	6.95
2006-03-31	6.97
2006-04-30	6.84
2006-05-31	6.83
2006-06-30	6.87
2006-07-31	6.89
2006-08-31	7.41
2006-09-30	7.08
2006-10-31	7.09
2006-11-30	7.15
2006-12-31	7.1
2007-01-31	7.44
2007-02-28	7.51
2007-03-31	7.54
2007-04-30	7.43
2007-05-31	7.69
2007-06-30	7.79
2007-07-31	7.97
2007-08-31	8
2007-09-30	7.95
2007-10-31	8.01
2007-11-30	8
2007-12-31	7.75
2008-01-31	7.75
2008-02-29	7.59
2008-03-31	7.56
2008-04-30	7.44
2008-05-31	7.38
2008-06-30	7.36
2008-07-31	7.36
2008-08-31	7.25
2008-09-30	7.31
2008-10-31	6.87
2008-11-30	5.47
2008-12-31	4.36
2009-01-31	3.8
2009-02-28	3.45
2009-03-31	2.99
2009-04-30	2.93
2009-05-31	2.97
2009-06-30	3
2009-07-31	3.08
2009-08-31	3.2
2009-09-30	3.2
2009-10-31	3.24
2009-11-30	3.54
2009-12-31	3.53
2010-01-31	3.58
2010-02-28	3.95
2010-03-31	3.83
2010-04-30	3.92
2010-05-31	4.02
2010-06-30	4.18
2010-07-31	4.23
2010-08-31	4.28
2010-09-30	4.38
2010-10-31	4.42
2010-11-30	4.46
2010-12-31	4.46
2011-01-31	4.38
2011-02-28	4.3
2011-03-31	4.34
2011-04-30	4.43
2011-05-31	4.55
2011-06-30	4.64
2011-07-31	4.78
2011-08-31	4.84
2011-09-30	4.76
2011-10-31	4.74
2011-11-30	4.79
2011-12-31	4.83
2012-01-31	4.68
2012-02-29	4.54
2012-03-31	4.58
2012-04-30	4.5
2012-05-31	4.51
2012-06-30	4.44
2012-07-31	4.48
2012-08-31	4.2
2012-09-30	4.45
2012-10-31	4.27
2012-11-30	4.43
2012-12-31	4.53
2013-01-31	4.03
2013-02-28	4.03
2013-03-31	3.89
2013-04-30	3.62
2013-05-31	3.73
2013-06-30	3.75
2013-07-31	3.77
2013-08-31	3.86
2013-09-30	3.86
2013-10-31	3.88
2013-11-30	3.76
2013-12-31	3.66
2014-01-31	3.63
2014-02-28	3.77
2014-03-31	3.71
2014-04-30	3.46
2014-05-31	3.64
2014-06-30	3.74
2014-07-31	3.75
2014-08-31	3.77
2014-09-30	3.78
2014-10-31	3.79
2014-11-30	3.65
2014-12-31	3.57
2015-01-31	3.62
2015-02-28	3.54
2015-03-31	3.49
2015-04-30	3.51
2015-05-31	3.52
2015-06-30	3.51
2015-07-31	3.01
2015-08-31	3.01
2015-09-30	3.05
2015-10-31	3.02
2015-11-30	3.02
2015-12-31	3.03