Month	Percent
2004-01-31	3.5
2004-02-29	3.65
2004-03-31	3.68
2004-04-30	3.71
2004-05-31	3.88
2004-06-30	4.09
2004-07-31	4.17
2004-08-31	4.35
2004-09-30	4.46
2004-10-31	4.5
2004-11-30	4.5
2004-12-31	4.47
2005-01-31	4.46
2005-02-28	4.46
2005-03-31	4.49
2005-04-30	4.52
2005-05-31	4.52
2005-06-30	4.49
2005-07-31	4.46
2005-08-31	4.35
2005-09-30	4.31
2005-10-31	4.29
2005-11-30	4.29
2005-12-31	4.29
2006-01-31	4.28
2006-02-28	4.26
2006-03-31	4.26
2006-04-30	4.28
2006-05-31	4.31
2006-06-30	4.38
2006-07-31	4.46
2006-08-31	4.41
2006-09-30	4.51
2006-10-31	4.56
2006-11-30	4.68
2006-12-31	4.79
2007-01-31	4.87
2007-02-28	5.03
2007-03-31	5.07
2007-04-30	5.09
2007-05-31	5.21
2007-06-30	5.29
2007-07-31	5.44
2007-08-31	5.59
2007-09-30	5.82
2007-10-31	5.78
2007-11-30	5.77
2007-12-31	5.87
2008-01-31	5.69
2008-02-29	5.41
2008-03-31	5.34
2008-04-30	5.34
2008-05-31	5.32
2008-06-30	5.37
2008-07-31	5.43
2008-08-31	5.45
2008-09-30	5.45
2008-10-31	5.53
2008-11-30	5.12
2008-12-31	4.15
2009-01-31	3.46
2009-02-28	2.96
2009-03-31	2.64
2009-04-30	2.35
2009-05-31	2.15
2009-06-30	1.94
2009-07-31	1.65
2009-08-31	1.44
2009-09-30	1.25
2009-10-31	1.09
2009-11-30	1.02
2009-12-31	0.98
2010-01-31	0.94
2010-02-28	0.92
2010-03-31	0.94
2010-04-30	0.95
2010-05-31	0.94
2010-06-30	0.98
2010-07-31	1.03
2010-08-31	1.05
2010-09-30	1.06
2010-10-31	1.08
2010-11-30	1.09
2010-12-31	1.1