Month	Percent
1999-01-31	13.21
1999-02-28	13.78
1999-03-31	13.47
1999-04-30	12.97
1999-05-31	13.04
1999-06-30	12.98
1999-07-31	12.56
1999-08-31	12.48
1999-09-30	12.77
1999-10-31	12.72
1999-11-30	12.98
1999-12-31	12.26
2000-01-31	13.31
2000-02-29	13.4
2000-03-31	13.06
2000-04-30	12.85
2000-05-31	12.86
2000-06-30	12.81
2000-07-31	12.63
2000-08-31	12.74
2000-09-30	12.77
2000-10-31	12.86
2000-11-30	12.78
2000-12-31	12.54
2001-01-31	12.37
2001-02-28	12.52
2001-03-31	12.16
2001-04-30	12.14
2001-05-31	12.14
2001-06-30	11.98
2001-07-31	12.03
2001-08-31	12.09
2001-09-30	12.3
2001-10-31	12.37
2001-11-30	12.21
2001-12-31	12.27
2002-01-31	11.74
2002-02-28	11.82
2002-03-31	11.44
2002-04-30	11.54
2002-05-31	11.32
2002-06-30	11.32
2002-07-31	11.37
2002-08-31	11.32
2002-09-30	11.57
2002-10-31	11.48
2002-11-30	11.51
2002-12-31	11.38
2003-01-31	11.28
2003-02-28	11.61
2003-03-31	11.29
2003-04-30	11.18
2003-05-31	11
2003-06-30	11.03
2003-07-31	10.83
2003-08-31	11.04
2003-09-30	11.11
2003-10-31	11.03
2003-11-30	11.1
2003-12-31	10.98
2004-01-31	10.05
2004-02-29	10.72
2004-03-31	10.43
2004-04-30	10.26
2004-05-31	10
2004-06-30	10.36
2004-07-31	10.15
2004-08-31	10.17
2004-09-30	10.38
2004-10-31	10.47
2004-11-30	11.02
2004-12-31	10.67
2005-01-31	11
2005-02-28	11.15
2005-03-31	11.05
2005-04-30	11.05
2005-05-31	11.04
2005-06-30	11.04
2005-07-31	11.06
2005-08-31	11.11
2005-09-30	11.45
2005-10-31	11.29
2005-11-30	11.38
2005-12-31	11.35
2006-01-31	11.4
2006-02-28	11.49
2006-03-31	11.13
2006-04-30	11.11
2006-05-31	11.17
2006-06-30	11.18
2006-07-31	11.1
2006-08-31	11.54
2006-09-30	11.68
2006-10-31	12.01
2006-11-30	12.24
2006-12-31	11.96
2007-01-31	12.13
2007-02-28	12.2
2007-03-31	11.77
2007-04-30	12.17
2007-05-31	11.95
2007-06-30	12.05
2007-07-31	11.88
2007-08-31	12.13
2007-09-30	12.35
2007-10-31	12.07
2007-11-30	12.21
2007-12-31	11.92
2008-01-31	12.3
2008-02-29	12.26
2008-03-31	12.02
2008-04-30	12.16
2008-05-31	12.03
2008-06-30	12.08
2008-07-31	11.98
2008-08-31	12.14
2008-09-30	12.27
2008-10-31	12.3
2008-11-30	12.4
2008-12-31	12
2009-01-31	12.33
2009-02-28	12.37
2009-03-31	12.16
2009-04-30	12.28
2009-05-31	12.27
2009-06-30	12.32
2009-07-31	12.21
2009-08-31	12.27
2009-09-30	12.33
2009-10-31	11.99
2009-11-30	12.2
2009-12-31	11.82
2010-01-31	12.17
2010-02-28	12.36
2010-03-31	12.13
2010-04-30	12.28
2010-05-31	12.15
2010-06-30	12.38
2010-07-31	12.28
2010-08-31	12.24
2010-09-30	12.37
2010-10-31	12.17
2010-11-30	12.08
2010-12-31	12
2011-01-31	12.19
2011-02-28	12.16
2011-03-31	11.61
2011-04-30	11.68
2011-05-31	11.76
2011-06-30	11.86
2011-07-31	11.47
2011-08-31	11.44
2011-09-30	11.48
2011-10-31	11.26
2011-11-30	11.05
2011-12-31	10.82
2012-01-31	11.03
2012-02-29	11.04
2012-03-31	10.83
2012-04-30	11.06
2012-05-31	10.83
2012-06-30	10.9
2012-07-31	10.79
2012-08-31	10.77
2012-09-30	10.91
2012-10-31	10.78
2012-11-30	10.73
2012-12-31	10.52
2013-01-31	11.85
2013-02-28	12.38
2013-03-31	11.28
2013-04-30	11.63
2013-05-31	11.46
2013-06-30	11.55
2013-07-31	11.28
2013-08-31	11.26
2013-09-30	11.5
2013-10-31	11.23
2013-11-30	11.18
2013-12-31	10.97
2014-01-31	11.14
2014-02-28	11.57
2014-03-31	10.92
2014-04-30	10.88
2014-05-31	10.78
2014-06-30	10.87
2014-07-31	10.73
2014-08-31	10.8
2014-09-30	11.01
2014-10-31	10.67
2014-11-30	10.67
2014-12-31	10.36
2015-01-31	10.57
2015-02-28	11.08
2015-03-31	10.55
2015-04-30	10.45
2015-05-31	10.48
2015-06-30	10.58
2015-07-31	10.33
2015-08-31	10.41
2015-09-30	10.53
2015-10-31	10.38
2015-11-30	10.36
2015-12-31	10.16