Month	Percent
2004-01-31	4.3
2004-02-29	4.35
2004-03-31	4.48
2004-04-30	4.48
2004-05-31	4.64
2004-06-30	4.78
2004-07-31	4.9
2004-08-31	5.06
2004-09-30	5.08
2004-10-31	5.1
2004-11-30	5.22
2004-12-31	5.16
2005-01-31	5.11
2005-02-28	5.1
2005-03-31	5.05
2005-04-30	5.07
2005-05-31	5.07
2005-06-30	5.02
2005-07-31	5
2005-08-31	4.92
2005-09-30	4.87
2005-10-31	4.82
2005-11-30	4.82
2005-12-31	4.8
2006-01-31	4.85
2006-02-28	4.83
2006-03-31	4.78
2006-04-30	4.73
2006-05-31	4.79
2006-06-30	4.82
2006-07-31	4.86
2006-08-31	4.9
2006-09-30	4.95
2006-10-31	5
2006-11-30	5.01
2006-12-31	5.07
2007-01-31	5.11
2007-02-28	5.2
2007-03-31	5.26
2007-04-30	5.29
2007-05-31	5.34
2007-06-30	5.45
2007-07-31	5.59
2007-08-31	5.71
2007-09-30	5.81
2007-10-31	5.98
2007-11-30	5.99
2007-12-31	5.84
2008-01-31	5.74
2008-02-29	5.67
2008-03-31	5.58
2008-04-30	5.63
2008-05-31	5.47
2008-06-30	5.6
2008-07-31	5.58
2008-08-31	5.62
2008-09-30	5.71
2008-10-31	5.9
2008-11-30	5.62
2008-12-31	4.09
2009-01-31	3.32
2009-02-28	2.75
2009-03-31	2.6
2009-04-30	2.1
2009-05-31	1.79
2009-06-30	1.85
2009-07-31	1.64
2009-08-31	1.46
2009-09-30	1.54
2009-10-31	1.42
2009-11-30	1.42
2009-12-31	1.34