Month	Percent
1999-01-01	96.34
1999-02-01	99.47
1999-03-01	98.67
1999-04-01	110.55
1999-05-01	96.75
1999-06-01	64.73
1999-07-01	68.36
1999-08-01	75.88
1999-09-01	83.74
1999-10-01	86.87
1999-11-01	89.06
1999-12-01	78.09
2000-01-01	58.57
2000-02-01	51.06
2000-03-01	40.95
2000-04-01	41.12
2000-05-01	41.05
2000-06-01	37.82
2000-07-01	29.44
2000-08-01	25.68
2000-09-01	23.59
2000-10-01	23.80
2000-11-01	24.18
2000-12-01	24.70
2001-01-01	23.29
2001-02-01	21.97
2001-03-01	22.36
2001-04-01	20.96
2001-05-01	19.34
2001-06-01	18.81
2001-07-01	18.96
2001-08-01	18.58
2001-09-01	17.48
2001-10-01	17.34
2001-11-01	16.84
2001-12-01	16.67
2002-01-01	15.70
2002-02-01	15.10
2002-03-01	16.09
2002-04-01	17.05
2002-05-01	16.85
2002-06-01	16.56
2002-07-01	16.24
2002-08-01	16.28
2002-09-01	16.23
2002-10-01	15.39
2002-11-01	14.62
2002-12-01	13.78
2003-01-01	13.14
2003-02-01	10.89
2003-03-01	9.43
2003-04-01	8.93
2003-05-01	8.05
2003-06-01	7.74
2003-07-01	8.42
2003-08-01	8.43
2003-09-01	8.81
2003-10-01	8.59
2003-11-01	8.60
2003-12-01	8.35
2004-01-01	7.76
2004-02-01	8.16
2004-03-01	7.97
2004-04-01	8.35
2004-05-01	8.41
2004-06-01	8.48
2004-07-01	8.49
2004-08-01	8.52
2004-09-01	8.37
2004-10-01	8.28
2004-11-01	8.22
2004-12-01	8.46
2005-01-01	8.41
2005-02-01	8.38
2005-03-01	8.49
2005-04-01	8.53
2005-05-01	8.51
2005-06-01	8.50
2005-07-01	8.47
2005-08-01	8.21
2005-09-01	7.73
2005-10-01	7.58
2005-11-01	7.38
2005-12-01	7.10
2006-01-01	6.96
2006-02-01	7.01
2006-03-01	7.01
2006-04-01	7.04
2006-05-01	7.05
2006-06-01	7.06
2006-07-01	7.07
2006-08-01	7.02
2006-09-01	6.93
2006-10-01	6.91
2006-11-01	6.89
2006-12-01	6.77
2007-01-01	6.77
2007-02-01	6.77
2007-03-01	6.77
2007-04-01	6.73
2007-05-01	6.68
2007-06-01	6.68
2007-07-01	6.65
2007-08-01	6.71
2007-09-01	6.82
2007-10-01	6.70
2007-11-01	6.67
2007-12-01	6.66
2008-01-01	6.63
2008-02-01	6.83
2008-03-01	6.96
2008-04-01	6.96
2008-05-01	6.99
2008-06-01	6.98
2008-07-01	7.13
2008-08-01	7.56
2008-09-01	8.25
2008-10-01	8.73
2008-11-01	8.46
2008-12-01	8.80
2009-01-01	9.98
2009-02-01	10.09
2009-03-01	10.58
2009-04-01	10.12
2009-05-01	10.13
2009-06-01	9.70
2009-07-01	10.04
2009-08-01	10.11
2009-09-01	10.23
2009-10-01	9.59
2009-11-01	9.07
2009-12-01	8.85
2010-01-01	8.46
2010-02-01	8.25
2010-03-01	7.89
2010-04-01	7.55
2010-05-01	7.71
2010-06-01	7.63
2010-07-01	7.62
2010-08-01	7.65
2010-09-01	7.71
2010-10-01	7.67
2010-11-01	7.83
2010-12-01	8.01
2011-01-01	8.00
2011-02-01	8.00
2011-03-01	8.05
2011-04-01	7.95
2011-05-01	8.02
2011-06-01	8.14
2011-07-01	8.04
2011-08-01	8.19
2011-09-01	8.00
2011-10-01	7.97
2011-11-01	8.14
2011-12-01	8.23
2012-01-01	8.35
2012-02-01	8.06
2012-03-01	8.09
2012-04-01	8.18
2012-05-01	8.13
2012-06-01	8.26
2012-07-01	8.09
2012-08-01	8.17
2012-09-01	8.25
2012-10-01	8.21
2012-11-01	7.96
2012-12-01	8.10
2013-01-01	6.94
2013-02-01	6.99
2013-03-01	7.13
2013-04-01	7.05
2013-05-01	6.99
2013-06-01	7.35
2013-07-01	7.51
2013-08-01	7.56
2013-09-01	7.50
2013-10-01	7.53
2013-11-01	7.65
2013-12-01	7.77
2014-01-01	7.91
2014-02-01	7.80
2014-03-01	8.17
2014-04-01	8.18
2014-05-01	8.14
2014-06-01	8.12
2014-07-01	8.22
2014-08-01	8.57
2014-09-01	8.73
2014-10-01	8.88
2014-11-01	8.63
2014-12-01	10.22
2015-01-01	10.37
2015-02-01	10.51
2015-03-01	10.70
2015-04-01	10.00
2015-05-01	9.61
2015-06-01	9.13
2015-07-01	9.19
2015-08-01	12.16
2015-09-01	12.64
2015-10-01	12.27
2015-11-01	12.24
2015-12-01	11.82
2016-01-01	11.56
2016-02-01	11.25
2016-03-01	10.65
2016-04-01	10.61
2016-05-01	10.49
2016-06-01	10.30
2016-07-01	10.13
2016-08-01	10.12
2016-09-01	10.01
2016-10-01	10.08
2016-11-01	10.11
2016-12-01	9.95
2017-01-01	9.62
2017-02-01	9.77
2017-03-01	9.56
2017-04-01	9.33
2017-05-01	9.09
2017-06-01	8.99
2017-07-01	8.84
2017-08-01	8.74
2017-09-01	8.65
2017-10-01	8.59
2017-11-01	8.48
2017-12-01	8.25
2018-01-01	7.98
2018-02-01	7.85
2018-03-01	7.79
2018-04-01	7.81
2018-05-01	7.67
2018-06-01	7.62