Month	Percent
1986-12-31	24.9
1987-01-31	20.3
1987-02-28	15.2
1987-03-31	12.8
1987-04-30	13.4
1987-05-31	16.4
1987-06-30	16.9
1987-07-31	18.5
1987-08-31	17.9
1987-09-30	17.9
1987-10-31	16.8
1987-11-30	18.1
1987-12-31	16.8
1988-01-31	16.1
1988-02-29	13.6
1988-03-31	17.2
1988-04-30	18.8
1988-05-31	22
1988-06-30	21.3
1988-07-31	25.1
1988-08-31	26.6
1988-09-30	25.7
1988-10-31	21
1988-11-30	17.4
1988-12-31	15.1
1989-01-31	13.8
1989-02-28	12.1
1989-03-31	13.3
1989-04-30	14
1989-05-31	15.6
1989-06-30	14.8
1989-07-31	14.5
1989-08-31	14.5
1989-09-30	14.8
1989-10-31	14.7
1989-11-30	14.1
1989-12-31	13.2
1990-01-31	12.4
1990-02-28	11.3
1990-03-31	22.3
1990-04-30	20.7
1990-05-31	20.8
1990-06-30	10.9
1990-07-31	12
1990-08-31	11.2
1990-09-30	10.4
1990-10-31	10.5
1990-11-30	11.6
1990-12-31	9.6
1991-01-31	8
1991-02-28	7.5
1991-03-31	8
1991-04-30	6.9
1991-05-31	5
1991-06-30	3.5
1991-07-31	4.5
1991-08-31	5
1991-09-30	6.5
1991-10-31	5.6
1991-11-30	7.6
1991-12-31	4.8
1992-01-31	5.6
1992-02-29	3.2
1992-03-31	4.5
1992-04-30	4
1992-05-31	3.9
1992-06-30	4.5
1992-07-31	5.7
1992-08-31	5.4
1992-09-30	4.7
1992-10-31	4.4
1992-11-30	4.1
1992-12-31	2.3
1993-01-31	2.1
1993-02-28	1.6
1993-03-31	1.7
1993-04-30	0.5
1993-05-31	1.9
1993-06-30	2.8
1993-07-31	4.2
1993-08-31	3.4
1993-09-30	4.3
1993-10-31	2.8
1993-11-30	1.5
1993-12-31	1.9
1994-01-31	2.1
1994-02-28	3.3
1994-03-31	3
1994-04-30	2.2
1994-05-31	2.5
1994-06-30	2.8
1994-07-31	4.9
1994-08-31	5.1
1994-09-30	5.5
1994-10-31	4.6
1994-11-30	6.1
1994-12-31	5.8
1995-01-31	7.8
1995-02-28	6
1995-03-31	8.7
1995-04-30	7.2
1995-05-31	8.9
1995-06-30	5.7
1995-07-31	8.3
1995-08-31	5.4
1995-09-30	7.1
1995-10-31	6.1
1995-11-30	9.8
1995-12-31	8.8
1996-01-31	7.8
1996-02-29	8.6
1996-03-31	8.5
1996-04-30	8.2
1996-05-31	7.1
1996-06-30	8.2
1996-07-31	10.3
1996-08-31	9.5
1996-09-30	7.3
1996-10-31	8.5
1996-11-30	9.4
1996-12-31	7.6
1997-01-31	5.8
1997-02-28	4.6
1997-03-31	5.1
1997-04-30	3.5
1997-05-31	5.4
1997-06-30	7.8
1997-07-31	8.6
1997-08-31	6.8
1997-09-30	4.6
1997-10-31	5.6
1997-11-30	5.9
1997-12-31	5.7
1998-01-31	5.8
1998-02-28	7.9
1998-03-31	7.2
1998-04-30	5.8
1998-05-31	5
1998-06-30	6.9
1998-07-31	7.4
1998-08-31	6.7
1998-09-30	7.2
1998-10-31	7.5
1998-11-30	9.1
1998-12-31	6.9
1999-01-31	7.7
1999-02-28	4.9
1999-03-31	6.7
1999-04-30	6.5
1999-05-31	6.9
1999-06-30	6.8
1999-07-31	6.2
1999-08-31	6.7
1999-09-30	8.4
1999-10-31	8
1999-11-30	9.3
1999-12-31	9.2
2000-01-31	9.9
2000-02-29	10.5
2000-03-31	11.6
2000-04-30	13.6
2000-05-31	14.6
2000-06-30	11.6
2000-07-31	8.9
2000-08-31	7.7
2000-09-30	9.5
2000-10-31	9
2000-11-30	5.6
2000-12-31	4
2001-01-31	6.4
2001-02-28	8
2001-03-31	8.4
2001-04-30	7.6
2001-05-31	6.3
2001-06-30	9.6
2001-07-31	8.1
2001-08-31	11.3
2001-09-30	8.7
2001-10-31	10.7
2001-11-30	9.4
2001-12-31	7.8
2002-01-31	7.1
2002-02-28	6.6
2002-03-31	7.9
2002-04-30	8.1
2002-05-31	10.7
2002-06-30	9
2002-07-31	9.8
2002-08-31	11
2002-09-30	12.7
2002-10-31	14.1
2002-11-30	11.6
2002-12-31	13.2
2003-01-31	10.3
2003-02-28	9.6
2003-03-31	6.4
2003-04-30	8
2003-05-31	8.7
2003-06-30	12
2003-07-31	12.2
2003-08-31	12.5
2003-09-30	11.3
2003-10-31	12.7
2003-11-30	12.3
2003-12-31	11.9
2004-01-31	11
2004-02-29	11.2
2004-03-31	8.2
2004-04-30	6.1
2004-05-31	5.4
2004-06-30	10.1
2004-07-31	11.9
2004-08-31	12.7
2004-09-30	12.5
2004-10-31	12.1
2004-11-30	7.9
2004-12-31	7.7
2005-01-31	8.2
2005-02-28	8.6
2005-03-31	7.6
2005-04-30	7.2
2005-05-31	9.8
2005-06-30	11.2
2005-07-31	11.2
2005-08-31	11.1
2005-09-30	11.9
2005-10-31	9.6
2005-11-30	11.5
2005-12-31	8.4
2006-01-31	5
2006-02-28	2.8
2006-03-31	4.9
2006-04-30	8.8
2006-05-31	11.1
2006-06-30	12.7
2006-07-31	17.9
2006-08-31	17
2006-09-30	14.4
2006-10-31	7.9
2006-11-30	7
2006-12-31	8.2
2007-01-31	9.7
2007-02-28	10.5
2007-03-31	7.5
2007-04-30	8.9
2007-05-31	5.4
2007-06-30	7
2007-07-31	9.8
2007-08-31	12
2007-09-30	11.2
2007-10-31	9
2007-11-30	7.2
2007-12-31	4.5
2008-01-31	2
2008-02-29	7.2
2008-03-31	9
2008-04-30	6.1
2008-05-31	4
2008-06-30	5.2
2008-07-31	3.6
2008-08-31	-1.5
2008-09-30	-5
2008-10-31	-4.9
2008-11-30	-4.2
2008-12-31	-12.9
2009-01-31	-9.7
2009-02-28	-7.8
2009-03-31	2.5
2009-04-30	0.1
2009-05-31	-0.2
2009-06-30	-0.1
2009-07-31	0.5
2009-08-31	0.1
2009-09-30	-0.7
2009-10-31	0.7
2009-11-30	2.4
2009-12-31	3.2
2010-01-31	3.1
2010-02-28	0.1
2010-03-31	-0.5
2010-04-30	-1.5
2010-05-31	-1.1
2010-06-30	-0.5
2010-07-31	0.1
2010-08-31	0.3
2010-09-30	0
2010-10-31	-0.1
2010-11-30	0.4
2010-12-31	0
2011-01-31	0.4
2011-02-28	0.5
2011-03-31	0.1
2011-04-30	-0.2
2011-05-31	-1.4
2011-06-30	0.5
2011-07-31	0.3
2011-08-31	0.3
2011-09-30	-0.2
2011-10-31	-0.5
2011-11-30	0.9
2011-12-31	-1.3
2012-01-31	-0.6
2012-02-29	-1.7
2012-03-31	0.3
2012-04-30	-0.7
2012-05-31	-0.6
2012-06-30	-0.8
2012-07-31	-0.5
2012-08-31	0
2012-09-30	0.2
2012-10-31	0.2
2012-11-30	0.6
2012-12-31	-0.5
2013-01-31	0.9
2013-02-28	-0.3
2013-03-31	0.5
2013-04-30	-1.3
2013-05-31	-1.1
2013-06-30	-1.1
2013-07-31	0.5
2013-08-31	1.7
2013-09-30	2.2
2013-10-31	2.3
2013-11-30	2.3
2013-12-31	1.8
2014-01-31	1.5
2014-02-28	1.2
2014-03-31	0.9
2014-04-30	0.2
2014-05-31	1.1
2014-06-30	1.9
2014-07-31	2.8
2014-08-31	2.4
2014-09-30	2.5
2014-10-31	1.7
2014-11-30	1.5
2014-12-31	0.9
2015-01-31	0.9
2015-02-28	0.9
2015-03-31	1.8