Month	Percent
2004-01-31	3.6
2004-02-29	3.73
2004-03-31	3.81
2004-04-30	3.79
2004-05-31	3.96
2004-06-30	4.15
2004-07-31	4.27
2004-08-31	4.45
2004-09-30	4.55
2004-10-31	4.59
2004-11-30	4.61
2004-12-31	4.56
2005-01-31	4.55
2005-02-28	4.55
2005-03-31	4.58
2005-04-30	4.61
2005-05-31	4.61
2005-06-30	4.58
2005-07-31	4.56
2005-08-31	4.46
2005-09-30	4.43
2005-10-31	4.42
2005-11-30	4.42
2005-12-31	4.42
2006-01-31	4.34
2006-02-28	4.32
2006-03-31	4.33
2006-04-30	4.29
2006-05-31	4.33
2006-06-30	4.39
2006-07-31	4.47
2006-08-31	4.42
2006-09-30	4.52
2006-10-31	4.57
2006-11-30	4.68
2006-12-31	4.78
2007-01-31	4.86
2007-02-28	5.01
2007-03-31	5.06
2007-04-30	5.11
2007-05-31	5.2
2007-06-30	5.29
2007-07-31	5.43
2007-08-31	5.58
2007-09-30	5.8
2007-10-31	5.78
2007-11-30	5.77
2007-12-31	5.86
2008-01-31	5.7
2008-02-29	5.42
2008-03-31	5.36
2008-04-30	5.36
2008-05-31	5.35
2008-06-30	5.38
2008-07-31	5.44
2008-08-31	5.46
2008-09-30	5.46
2008-10-31	5.54
2008-11-30	5.15
2008-12-31	4.21
2009-01-31	3.54
2009-02-28	3.04
2009-03-31	2.73
2009-04-30	2.45
2009-05-31	2.23
2009-06-30	2.02
2009-07-31	1.74
2009-08-31	1.54
2009-09-30	1.36
2009-10-31	1.2
2009-11-30	1.14
2009-12-31	1.11
2010-01-31	1.06
2010-02-28	1.05
2010-03-31	1.09
2010-04-30	1.09
2010-05-31	1.08
2010-06-30	1.12
2010-07-31	1.15
2010-08-31	1.18
2010-09-30	1.19
2010-10-31	1.25
2010-11-30	1.26
2010-12-31	1.27