Month	Percent
1998-04-01	39.8
1998-05-01	38
1998-06-01	40.2
1998-07-01	40.4
1998-08-01	40.6
1998-09-01	41.2
1998-10-01	40
1998-11-01	43.2
1998-12-01	40.5
1999-01-01	41.6
1999-02-01	41.7
1999-03-01	41.1
1999-04-01	41.5
1999-05-01	39.7
1999-06-01	41.9
1999-07-01	40.2
1999-08-01	40.3
1999-09-01	41
1999-10-01	41.3
1999-11-01	44.5
1999-12-01	41.8
2000-01-01	40.6
2000-02-01	40.7
2000-03-01	40.1
2000-04-01	38.4
2000-05-01	36.6
2000-06-01	38.8
2000-07-01	37.4
2000-08-01	37.6
2000-09-01	38.2
2000-10-01	35.1
2000-11-01	38.1
2000-12-01	35.6
2001-01-01	37.4
2001-02-01	37.5
2001-03-01	36.9
2001-04-01	36.7
2001-05-01	35
2001-06-01	37.1
2001-07-01	33.5
2001-08-01	33.7
2001-09-01	34.3
2001-10-01	34.6
2001-11-01	37.6
2001-12-01	35
2002-01-01	38
2002-02-01	38.2
2002-03-01	37.5
2002-04-01	35.2
2002-05-01	33.5
2002-06-01	35.6
2002-07-01	33.4
2002-08-01	33.6
2002-09-01	34.2
2002-10-01	33.4
2002-11-01	36.4
2002-12-01	33.8
2003-01-01	36.1
2003-02-01	36.3
2003-03-01	35.7
2003-04-01	35.7
2003-05-01	34
2003-06-01	36.1
2003-07-01	36.4
2003-08-01	36.6
2003-09-01	37.3
2003-10-01	37.4
2003-11-01	40.5
2003-12-01	37.9
2004-01-01	40.1
2004-02-01	34.9
2004-03-01	37.7
2004-04-01	35.9
2004-05-01	32.1
2004-06-01	36.8
2004-07-01	36.1
2004-08-01	30.4
2004-09-01	36.3
2004-10-01	34.2
2004-11-01	34.1
2004-12-01	37.7
2005-01-01	33.2
2005-02-01	33.9
2005-03-01	33.1
2005-04-01	33.5
2005-05-01	33.1
2005-06-01	35.7
2005-07-01	32.8
2005-08-01	34.9
2005-09-01	33.3
2005-10-01	35.6
2005-11-01	37.6
2005-12-01	33.7
2006-01-01	34.4
2006-02-01	34.2
2006-03-01	33.6
2006-04-01	34.8
2006-05-01	32.4
2006-06-01	33.1
2006-07-01	33.8
2006-08-01	32.3
2006-09-01	34.9
2006-10-01	33.7
2006-11-01	37.2
2006-12-01	36.9
2007-01-01	32.1
2007-02-01	32.9
2007-03-01	36.5
2007-04-01	31
2007-05-01	31.4
2007-06-01	32.6
2007-07-01	30.2
2007-08-01	33
2007-09-01	31.9
2007-10-01	29.5
2007-11-01	31.7
2007-12-01	28.2
2008-01-01	26.1
2008-02-01	33.6
2008-03-01	30.6
2008-04-01	25.6
2008-05-01	28.4
2008-06-01	28.1
2008-07-01	25.9
2008-08-01	29.6
2008-09-01	27.8
2008-10-01	25.8
2008-11-01	30.7
2008-12-01	28.7
2009-01-01	33.4
2009-02-01	31.9
2009-03-01	30.7
2009-04-01	33.6
2009-05-01	33.3
2009-06-01	30
2009-07-01	32.8
2009-08-01	32.6
2009-09-01	33.2
2009-10-01	36.7
2009-11-01	36.6
2009-12-01	35.0
2010-01-01	39.1
2010-02-01	40.2
2010-03-01	35.0
2010-04-01	39.3
2010-05-01	41.9
2010-06-01	35.8
2010-07-01	41
2010-08-01	39.9
2010-09-01	42.0
2010-10-01	41.2
2010-11-01	43.0
2010-12-01	44.9
2011-01-01	43.5
2011-02-01	48.2
2011-03-01	48.1
2011-04-01	50.3
2011-05-01	50.9
2011-06-01	51.0
2011-07-01	48.8
2011-08-01	53.1
2011-09-01	53.5
2011-10-01	54.2
2011-11-01	58.4
2011-12-01	57.8
2012-01-01	59.2
2012-02-01	60.7
2012-03-01	60.9
2012-04-01	60.9
2012-05-01	63.2
2012-06-01	61.4
2012-07-01	60.4
2012-08-01	66.6
2012-09-01	68.4
2012-10-01	60.8
2012-11-01	70.1
2012-12-01	63.6
2013-01-01	61.9
2013-02-01	74.7
2013-03-01	61.8
2013-04-01	61.5
2013-05-01	73.8
2013-06-01	59.5
2013-07-01	61.5
2013-08-01	69.5
2013-09-01	56.9
2013-10-01	58.2
2013-11-01	66.1
2013-12-01	61.6
2014-01-01	59.6
2014-02-01	61.6
2014-03-01	63.3
2014-04-01	59.2
2014-05-01	56.8
2014-06-01	56.5
2014-07-01	55.8
2014-08-01	55.3
2014-09-01	58.2
2014-10-01	56.2
2014-11-01	56.4
2014-12-01	58.0
2015-01-01	54.3
2015-02-01	56.1
2015-03-01	60.0
2015-04-01	60.5
2015-05-01	50.9
2015-06-01	51.1
2015-07-01	60.7
2015-08-01	44.2
2015-09-01	58.4
2015-10-01	58.1
2015-11-01	45.3
2015-12-01	59.4
2016-01-01	61.1
2016-02-01	47.1
2016-03-01	57.1
2016-04-01	58.9
2016-05-01	49.6
2016-06-01	49.0
2016-07-01	48.1
2016-08-01	49.7
2016-09-01	42.8
2016-10-01	47.2
2016-11-01	53.4
2016-12-01	45.1
2017-01-01	53.1
2017-02-01	57.2
2017-03-01	43.6
2017-04-01	52.5
2017-05-01	51.5
2017-06-01	41.6
2017-07-01	49.7
2017-08-01	42.3
2017-09-01	41.3
2017-10-01	49.7
2017-11-01	46.1
2017-12-01	48.7
2018-01-01	45.4
2018-02-01	53.3
2018-03-01	47.6
2018-04-01	43.0
2018-05-01	40.9
2018-06-01	43.9
2018-07-01	41.7