Month	Percent
1999-01-31	6.36
1999-02-28	5.97
1999-03-31	5.62
1999-04-30	5.31
1999-05-31	5.24
1999-06-30	5.06
1999-07-31	5.07
1999-08-31	5.06
1999-09-30	5.04
1999-10-31	5.22
1999-11-30	5.35
1999-12-31	5.42
2000-01-31	5.49
2000-02-29	5.76
2000-03-31	5.87
2000-04-30	5.95
2000-05-31	5.96
2000-06-30	5.97
2000-07-31	5.98
2000-08-31	6
2000-09-30	6.04
2000-10-31	6.01
2000-11-30	6.06
2000-12-31	5.97
2001-01-31	5.89
2001-02-28	5.82
2001-03-31	5.7
2001-04-30	5.31
2001-05-31	5.4
2001-06-30	5.28
2001-07-31	5.25
2001-08-31	5.06
2001-09-30	4.93
2001-10-31	4.66
2001-11-30	4.21
2001-12-31	4.05
2002-01-31	3.96
2002-02-28	3.91
2002-03-31	3.89
2002-04-30	3.9
2002-05-31	3.94
2002-06-30	3.92
2002-07-31	3.98
2002-08-31	3.98
2002-09-30	3.9
2002-10-31	3.87
2002-11-30	3.83
2002-12-31	3.91
2003-01-31	3.83
2003-02-28	3.78
2003-03-31	3.73
2003-04-30	3.64
2003-05-31	3.57
2003-06-30	3.61
2003-07-31	3.52
2003-08-31	3.43
2003-09-30	3.46
2003-10-31	3.47
2003-11-30	3.59
2003-12-31	3.64
2004-01-31	3.86
2004-02-29	3.95
2004-03-31	4.03
2004-04-30	3.91
2004-05-31	4.21
2004-06-30	4.4
2004-07-31	4.55
2004-08-31	4.71
2004-09-30	4.79
2004-10-31	4.81
2004-11-30	4.81
2004-12-31	4.77
2005-01-31	4.79
2005-02-28	4.78
2005-03-31	4.8
2005-04-30	4.86
2005-05-31	4.84
2005-06-30	4.81
2005-07-31	4.75
2005-08-31	4.64
2005-09-30	4.57
2005-10-31	4.58
2005-11-30	4.59
2005-12-31	4.58
2006-01-31	4.58
2006-02-28	4.53
2006-03-31	4.53
2006-04-30	4.51
2006-05-31	4.55
2006-06-30	4.6
2006-07-31	4.61
2006-08-31	4.68
2006-09-30	4.78
2006-10-31	4.84
2006-11-30	4.99
2006-12-31	5.07
2007-01-31	5.13
2007-02-28	5.24
2007-03-31	5.28
2007-04-30	5.31
2007-05-31	5.37
2007-06-30	5.44
2007-07-31	5.58
2007-08-31	5.74
2007-09-30	5.85
2007-10-31	5.81
2007-11-30	5.76
2007-12-31	5.89
2008-01-31	5.72
2008-02-29	5.53
2008-03-31	5.5
2008-04-30	5.53
2008-05-31	5.54
2008-06-30	5.49
2008-07-31	5.57
2008-08-31	5.53
2008-09-30	5.53
2008-10-31	5.39
2008-11-30	4.42
2008-12-31	3.4
2009-01-31	2.52
2009-02-28	2.28
2009-03-31	1.75
2009-04-30	1.38
2009-05-31	1.4
2009-06-30	1.24
2009-07-31	1.14
2009-08-31	1
2009-09-30	0.87
2009-10-31	0.79
2009-11-30	0.73
2009-12-31	0.69