Month	Percent
1999-04-30	6.32
1999-05-31	6.29
1999-06-30	6.28
1999-07-31	6.2
1999-08-31	6.13
1999-09-30	6.15
1999-10-31	6.17
1999-11-30	6.21
1999-12-31	6.27
2000-01-31	6.3
2000-02-29	6.45
2000-03-31	6.66
2000-04-30	6.67
2000-05-31	6.66
2000-06-30	6.65
2000-07-31	6.65
2000-08-31	6.62
2000-09-30	6.61
2000-10-31	6.52
2000-11-30	6.51
2000-12-31	6.47
2001-01-31	6.44
2001-02-28	6.38
2001-03-31	6.06
2001-04-30	6.04
2001-05-31	5.68
2001-06-30	5.45
2001-07-31	5.43
2001-08-31	5.31
2001-09-30	5.07
2001-10-31	4.83
2001-11-30	4.57
2001-12-31	4.14
2002-01-31	4.17
2002-02-28	4.14
2002-03-31	4.14
2002-04-30	4.1
2002-05-31	4.1
2002-06-30	4.07
2002-07-31	4.05
2002-08-31	3.97
2002-09-30	3.83
2002-10-31	3.89
2002-11-30	3.89
2002-12-31	3.88
2003-01-31	3.85
2003-02-28	3.84
2003-03-31	3.66
2003-04-30	3.65
2003-05-31	3.65
2003-06-30	3.64
2003-07-31	3.62
2003-08-31	3.4
2003-09-30	3.38
2003-10-31	3.38
2003-11-30	3.41
2003-12-31	3.67
2004-01-31	3.67
2004-02-29	3.68
2004-03-31	3.86
2004-04-30	3.88
2004-05-31	3.89
2004-06-30	4.08
2004-07-31	4.29
2004-08-31	4.31
2004-09-30	4.51
2004-10-31	4.51
2004-11-30	4.51
2004-12-31	4.52
2005-01-31	4.48
2005-02-28	4.48
2005-03-31	4.49
2005-04-30	4.49
2005-05-31	4.49
2005-06-30	4.46
2005-07-31	4.46
2005-08-31	4.41
2005-09-30	4.47
2005-10-31	4.47
2005-11-30	4.47
2005-12-31	4.48
2006-01-31	4.45
2006-02-28	4.48
2006-03-31	4.48
2006-04-30	4.41
2006-05-31	4.4
2006-06-30	4.36
2006-07-31	4.36
2006-08-31	4.36
2006-09-30	4.55
2006-10-31	4.55
2006-11-30	4.55
2006-12-31	4.76
2007-01-31	4.77
2007-02-28	4.93
2007-03-31	4.95
2007-04-30	4.95
2007-05-31	4.95
2007-06-30	5.06
2007-07-31	5.13
2007-08-31	5.34
2007-09-30	5.33
2007-10-31	5.32
2007-11-30	5.34
2007-12-31	5.29
2008-01-31	5.06
2008-02-29	5.06
2008-03-31	4.81
2008-04-30	4.81
2008-05-31	4.56
2008-06-30	4.56
2008-07-31	4.56
2008-08-31	4.54
2008-09-30	4.49
2008-10-31	4.36
2008-11-30	3.83
2008-12-31	2.1
2009-01-31	1.38
2009-02-28	0.96
2009-03-31	0.63
2009-04-30	0.42
2009-05-31	0.41
2009-06-30	0.42
2009-07-31	0.42
2009-08-31	0.41
2009-09-30	0.4
2009-10-31	0.4
2009-11-30	0.41
2009-12-31	0.41
2010-01-31	0.41
2010-02-28	0.47
2010-03-31	0.46
2010-04-30	0.46
2010-05-31	0.46
2010-06-30	0.7
2010-07-31	0.69
2010-08-31	0.61
2010-09-30	0.54
2010-10-31	0.4
2010-11-30	0.4
2010-12-31	0.4
2011-01-31	0.44
2011-02-28	0.44
2011-03-31	0.54
2011-04-30	0.55
2011-05-31	0.55
2011-06-30	0.5
2011-07-31	0.5
2011-08-31	0.5
2011-09-30	0.6
2011-10-31	0.6
2011-11-30	0.61
2011-12-31	0.61
2012-01-31	0.61
2012-02-29	0.65
2012-03-31	0.65
2012-04-30	0.66
2012-05-31	0.66
2012-06-30	0.66
2012-07-31	0.66
2012-08-31	0.66
2012-09-30	0.67
2012-10-31	0.66
2012-11-30	0.59
2012-12-31	0.65