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	9.42
2003-04-01	8.75
2003-05-01	7.66
2003-06-01	7.41
2003-07-01	8.27
2003-08-01	8.26
2003-09-01	8.45
2003-10-01	8.27
2003-11-01	8.18
2003-12-01	8.10
2004-01-01	7.48
2004-02-01	7.33
2004-03-01	7.20
2004-04-01	7.62
2004-05-01	7.99
2004-06-01	8.04
2004-07-01	8.03
2004-08-01	8.03
2004-09-01	7.96
2004-10-01	7.86
2004-11-01	7.85
2004-12-01	8.06
2005-01-01	8.03
2005-02-01	7.99
2005-03-01	8.02
2005-04-01	8.12
2005-05-01	8.10
2005-06-01	8.12
2005-07-01	8.09
2005-08-01	7.84
2005-09-01	7.39
2005-10-01	7.30
2005-11-01	7.17
2005-12-01	6.94
2006-01-01	6.78
2006-02-01	6.83
2006-03-01	6.87
2006-04-01	6.91
2006-05-01	6.94
2006-06-01	6.96
2006-07-01	6.95
2006-08-01	6.85
2006-09-01	6.77
2006-10-01	6.73
2006-11-01	6.74
2006-12-01	6.65
2007-01-01	6.65
2007-02-01	6.65
2007-03-01	6.66
2007-04-01	6.61
2007-05-01	6.57
2007-06-01	6.57
2007-07-01	6.53
2007-08-01	6.60
2007-09-01	6.72
2007-10-01	6.61
2007-11-01	6.58
2007-12-01	6.58
2008-01-01	6.54
2008-02-01	6.74
2008-03-01	6.86
2008-04-01	6.86
2008-05-01	6.87
2008-06-01	6.89
2008-07-01	7.04
2008-08-01	7.46
2008-09-01	8.12
2008-10-01	8.45
2008-11-01	8.52
2008-12-01	8.99
2009-01-01	10.28
2009-02-01	10.37
2009-03-01	10.78
2009-04-01	10.40
2009-05-01	10.62
2009-06-01	9.92
2009-07-01	10.55
2009-08-01	10.61
2009-09-01	10.57
2009-10-01	9.58
2009-11-01	9.01
2009-12-01	8.96
2010-01-01	8.30
2010-02-01	8.25
2010-03-01	7.66
2010-04-01	7.33
2010-05-01	7.55
2010-06-01	7.40
2010-07-01	7.39
2010-08-01	7.44
2010-09-01	7.50
2010-10-01	7.45
2010-11-01	7.56
2010-12-01	7.66
2011-01-01	7.66
2011-02-01	7.69
2011-03-01	7.71
2011-04-01	7.59
2011-05-01	7.70
2011-06-01	7.74
2011-07-01	7.59
2011-08-01	7.78
2011-09-01	7.88
2011-10-01	8.02
2011-11-01	8.10
2011-12-01	8.14
2012-01-01	8.15
2012-02-01	7.81
2012-03-01	7.81
2012-04-01	7.88
2012-05-01	7.98
2012-06-01	8.12
2012-07-01	7.95
2012-08-01	7.92
2012-09-01	7.95
2012-10-01	7.81
2012-11-01	7.56
2012-12-01	7.84
2013-01-01	6.71
2013-02-01	6.74
2013-03-01	6.86
2013-04-01	6.76
2013-05-01	6.70
2013-06-01	7.24
2013-07-01	7.21
2013-08-01	7.25
2013-09-01	7.26
2013-10-01	7.24
2013-11-01	7.40
2013-12-01	7.56
2014-01-01	7.70
2014-02-01	7.81
2014-03-01	8.47
2014-04-01	8.43
2014-05-01	8.42
2014-06-01	8.23
2014-07-01	8.44
2014-08-01	8.98
2014-09-01	9.13
2014-10-01	9.30
2014-11-01	9.38
2014-12-01	11.65
2015-01-01	12.40
2015-02-01	11.78
2015-03-01	12.05
2015-04-01	11.04
2015-05-01	10.48
2015-06-01	10.32
2015-07-01	10.31
2015-08-01	11.93
2015-09-01	12.36
2015-10-01	11.81
2015-11-01	11.65
2015-12-01	11.37
2016-01-01	11.24
2016-02-01	10.81
2016-03-01	10.16
2016-04-01	10.16
2016-05-01	10.06
2016-06-01	9.91
2016-07-01	9.72
2016-08-01	9.59
2016-09-01	9.45
2016-10-01	9.51
2016-11-01	9.57
2016-12-01	9.40
2017-01-01	9.14
2017-02-01	9.12
2017-03-01	8.99
2017-04-01	8.81
2017-05-01	8.63
2017-06-01	8.60
2017-07-01	8.56
2017-08-01	8.41
2017-09-01	8.26
2017-10-01	8.19
2017-11-01	8.13
2017-12-01	7.92
2018-01-01	7.68
2018-02-01	7.39
2018-03-01	7.68
2018-04-01	7.27
2018-05-01	7.20
2018-06-01	7.27