Month	Percent
2004-01-31	3.55
2004-02-29	3.75
2004-03-31	3.83
2004-04-30	3.91
2004-05-31	4
2004-06-30	4.06
2004-07-31	4.13
2004-08-31	4.22
2004-09-30	4.35
2004-10-31	4.49
2004-11-30	4.46
2004-12-31	4.48
2005-01-31	4.45
2005-02-28	4.52
2005-03-31	4.53
2005-04-30	4.6
2005-05-31	4.55
2005-06-30	4.55
2005-07-31	4.67
2005-08-31	4.71
2005-09-30	4.72
2005-10-31	4.68
2005-11-30	4.66
2005-12-31	4.66
2006-01-31	4.67
2006-02-28	4.65
2006-03-31	4.52
2006-04-30	4.52
2006-05-31	4.55
2006-06-30	4.56
2006-07-31	4.31
2006-08-31	4.42
2006-09-30	4.44
2006-10-31	4.46
2006-11-30	4.61
2006-12-31	4.63
2007-01-31	4.72
2007-02-28	4.84
2007-03-31	5.07
2007-04-30	5.21
2007-05-31	5.36
2007-06-30	5.5
2007-07-31	5.68
2007-08-31	5.79
2007-09-30	5.82
2007-10-31	5.87
2007-11-30	5.89
2007-12-31	5.92
2008-01-31	5.9
2008-02-29	5.83
2008-03-31	5.77
2008-04-30	5.75
2008-05-31	5.78
2008-06-30	5.75
2008-07-31	5.74
2008-08-31	5.73
2008-09-30	5.71
2008-10-31	5.71
2008-11-30	5.59
2008-12-31	5.27
2009-01-31	5.11
2009-02-28	4.96
2009-03-31	4.81
2009-04-30	4.56
2009-05-31	4.17
2009-06-30	4
2009-07-31	3.86
2009-08-31	3.48
2009-09-30	3.26
2009-10-31	3.15
2009-11-30	2.93
2009-12-31	2.74
2010-01-31	2.73
2010-02-28	2.71
2010-03-31	2.66
2010-04-30	2.65
2010-05-31	2.55
2010-06-30	2.54
2010-07-31	2.42
2010-08-31	2.29
2010-09-30	2.29
2010-10-31	2.3
2010-11-30	2.33
2010-12-31	2.31