Month	Percent
1998-04-01	28.2
1998-05-01	29.1
1998-06-01	30.3
1998-07-01	28.1
1998-08-01	30.3
1998-09-01	31.5
1998-10-01	28
1998-11-01	32.5
1998-12-01	31.6
1999-01-01	31.2
1999-02-01	32.1
1999-03-01	32.1
1999-04-01	30.2
1999-05-01	31.1
1999-06-01	32.4
1999-07-01	28.9
1999-08-01	31.1
1999-09-01	32.4
1999-10-01	29.4
1999-11-01	33.9
1999-12-01	33.1
2000-01-01	30.2
2000-02-01	31
2000-03-01	31.1
2000-04-01	28
2000-05-01	29
2000-06-01	30.2
2000-07-01	26.8
2000-08-01	28.9
2000-09-01	30.2
2000-10-01	25.4
2000-11-01	29.5
2000-12-01	28.8
2001-01-01	28.3
2001-02-01	29.1
2001-03-01	29.1
2001-04-01	26.9
2001-05-01	27.7
2001-06-01	29
2001-07-01	25.1
2001-08-01	27.2
2001-09-01	28.5
2001-10-01	26
2001-11-01	30.2
2001-12-01	29.7
2002-01-01	28.3
2002-02-01	29.2
2002-03-01	29.2
2002-04-01	25.2
2002-05-01	26
2002-06-01	27.2
2002-07-01	24.1
2002-08-01	26.1
2002-09-01	27.3
2002-10-01	24.1
2002-11-01	28.1
2002-12-01	27.5
2003-01-01	26.3
2003-02-01	27.1
2003-03-01	27.2
2003-04-01	24.8
2003-05-01	25.6
2003-06-01	26.7
2003-07-01	25.1
2003-08-01	27.1
2003-09-01	28.3
2003-10-01	25.6
2003-11-01	29.9
2003-12-01	29
2004-01-01	28.8
2004-02-01	26.3
2004-03-01	30.0
2004-04-01	26.2
2004-05-01	24.6
2004-06-01	27.5
2004-07-01	25.0
2004-08-01	23.3
2004-09-01	27.3
2004-10-01	26
2004-11-01	24.8
2004-12-01	28
2005-01-01	25.7
2005-02-01	24.3
2005-03-01	26.0
2005-04-01	23.6
2005-05-01	24.5
2005-06-01	27
2005-07-01	24.1
2005-08-01	26.3
2005-09-01	27.8
2005-10-01	25.3
2005-11-01	28.2
2005-12-01	26.6
2006-01-01	23.6
2006-02-01	26.5
2006-03-01	25.2
2006-04-01	23.9
2006-05-01	24.7
2006-06-01	24.3
2006-07-01	22.5
2006-08-01	24.5
2006-09-01	25.7
2006-10-01	22.7
2006-11-01	27.6
2006-12-01	28.7
2007-01-01	23.3
2007-02-01	25.7
2007-03-01	25.4
2007-04-01	20.8
2007-05-01	23.1
2007-06-01	21.1
2007-07-01	20.4
2007-08-01	22.1
2007-09-01	23.1
2007-10-01	21.6
2007-11-01	21.3
2007-12-01	24
2008-01-01	20.2
2008-02-01	22.3
2008-03-01	27.0
2008-04-01	20.3
2008-05-01	18.7
2008-06-01	22.1
2008-07-01	20.5
2008-08-01	18.8
2008-09-01	23.8
2008-10-01	20.6
2008-11-01	22
2008-12-01	25.8
2009-01-01	25.0
2009-02-01	26.4
2009-03-01	24.5
2009-04-01	25.1
2009-05-01	25.2
2009-06-01	23.1
2009-07-01	24.0
2009-08-01	24.2
2009-09-01	25.9
2009-10-01	27.9
2009-11-01	28.3
2009-12-01	29
2010-01-01	29.8
2010-02-01	32.5
2010-03-01	29.4
2010-04-01	31.3
2010-05-01	32.9
2010-06-01	29.7
2010-07-01	32.9
2010-08-01	30.8
2010-09-01	34.6
2010-10-01	35.5
2010-11-01	35.9
2010-12-01	40.2
2011-01-01	37.4
2011-02-01	39.1
2011-03-01	43.3
2011-04-01	43.8
2011-05-01	41.7
2011-06-01	44.6
2011-07-01	43.7
2011-08-01	44.2
2011-09-01	48.3
2011-10-01	48.9
2011-11-01	48.3
2011-12-01	53.4
2012-01-01	51.0
2012-02-01	52.1
2012-03-01	55.4
2012-04-01	50.9
2012-05-01	54.2
2012-06-01	56.7
2012-07-01	53.7
2012-08-01	58.4
2012-09-01	57.5
2012-10-01	53.1
2012-11-01	63.4
2012-12-01	57.4
2013-01-01	57.4
2013-02-01	65.1
2013-03-01	57.9
2013-04-01	56.4
2013-05-01	64.9
2013-06-01	56.7
2013-07-01	56.7
2013-08-01	61.2
2013-09-01	54.0
2013-10-01	53.3
2013-11-01	60.1
2013-12-01	57.1
2014-01-01	55.6
2014-02-01	58.3
2014-03-01	56.5
2014-04-01	54.0
2014-05-01	54.3
2014-06-01	48.2
2014-07-01	49.8
2014-08-01	49.2
2014-09-01	49.5
2014-10-01	52.9
2014-11-01	50.4
2014-12-01	51.2
2015-01-01	52.0
2015-02-01	51.9
2015-03-01	51.7
2015-04-01	54.6
2015-05-01	48.6
2015-06-01	45.7
2015-07-01	52.4
2015-08-01	43.9
2015-09-01	49.9
2015-10-01	51.5
2015-11-01	43.6
2015-12-01	51.3
2016-01-01	53.5
2016-02-01	48.9
2016-03-01	50.4
2016-04-01	50.7
2016-05-01	50.3
2016-06-01	46.3
2016-07-01	41.4
2016-08-01	47.7
2016-09-01	43.6
2016-10-01	41.8
2016-11-01	49.8
2016-12-01	44.0
2017-01-01	47.5
2017-02-01	50.8
2017-03-01	42.0
2017-04-01	44.9
2017-05-01	46.5
2017-06-01	39.9
2017-07-01	42.5
2017-08-01	40.1
2017-09-01	37.8
2017-10-01	42.1
2017-11-01	45.9
2017-12-01	42.9
2018-01-01	42.0
2018-02-01	48.3
2018-03-01	43.2
2018-04-01	39.3
2018-05-01	38.4
2018-06-01	38.7
2018-07-01	37.0