Month	Percent
1982-09-30	24.6
1982-10-31	20.4
1982-11-30	20.4
1982-12-31	16.8
1983-01-31	14.3
1983-02-28	15.6
1983-03-31	15.6
1983-04-30	13.8
1983-05-31	15.7
1983-06-30	16.5
1983-07-31	18.1
1983-08-31	12.8
1983-09-30	16.4
1983-10-31	16.7
1983-11-30	18.5
1983-12-31	14.8
1984-01-31	17.4
1984-02-29	18.8
1984-03-31	20.7
1984-04-30	17.7
1984-05-31	17.6
1984-06-30	16.3
1984-07-31	18.1
1984-08-31	16
1984-09-30	17.1
1984-10-31	17.8
1984-11-30	20.3
1984-12-31	17.6
1985-01-31	18.2
1985-02-28	16.2
1985-03-31	22.2
1985-04-30	18.6
1985-05-31	20.5
1985-06-30	16
1985-07-31	18.1
1985-08-31	15.8
1985-09-30	14.1
1985-10-31	15.2
1985-11-30	16.4
1985-12-31	16
1986-01-31	13
1986-02-28	16.6
1986-03-31	20.4
1986-04-30	19.5
1986-05-31	17
1986-06-30	17.9
1986-07-31	23.1
1986-08-31	23.5
1986-09-30	17.9
1986-10-31	18.9
1986-11-30	20.7
1986-12-31	24.2
1987-01-31	20
1987-02-28	17.6
1987-03-31	16.1
1987-04-30	16
1987-05-31	16.3
1987-06-30	19.6
1987-07-31	23.8
1987-08-31	21.3
1987-09-30	20.8
1987-10-31	17.9
1987-11-30	20.6
1987-12-31	19.9
1988-01-31	22.7
1988-02-29	21.6
1988-03-31	24.1
1988-04-30	23.2
1988-05-31	25.4
1988-06-30	26.5
1988-07-31	30.2
1988-08-31	28.4
1988-09-30	26.4
1988-10-31	22.6
1988-11-30	23.3
1988-12-31	21.1
1989-01-31	21.8
1989-02-28	20.5
1989-03-31	22.7
1989-04-30	19.8
1989-05-31	21
1989-06-30	19.8
1989-07-31	22.4
1989-08-31	22.9
1989-09-30	24.9
1989-10-31	21.4
1989-11-30	18.9
1989-12-31	18.1
1990-01-31	18.4
1990-02-28	20.3
1990-03-31	19.8
1990-04-30	16.9
1990-05-31	15.6
1990-06-30	13.5
1990-07-31	14.8
1990-08-31	13
1990-09-30	12.3
1990-10-31	12.7
1990-11-30	13.6
1990-12-31	10.5
1991-01-31	9.4
1991-02-28	8.6
1991-03-31	9.2
1991-04-30	7.5
1991-05-31	5.9
1991-06-30	4.4
1991-07-31	5.5
1991-08-31	5.7
1991-09-30	7.4
1991-10-31	5.7
1991-11-30	7
1991-12-31	5
1992-01-31	6.7
1992-02-29	4.2
1992-03-31	3.9
1992-04-30	3.7
1992-05-31	4.3
1992-06-30	5.6
1992-07-31	6
1992-08-31	6
1992-09-30	5
1992-10-31	5.3
1992-11-30	3.8
1992-12-31	2.5
1993-01-31	2.5
1993-02-28	2.7
1993-03-31	2.9
1993-04-30	1
1993-05-31	2.1
1993-06-30	2.5
1993-07-31	3.8
1993-08-31	4.3
1993-09-30	5.6
1993-10-31	5.2
1993-11-30	3.9
1993-12-31	3.7
1994-01-31	3
1994-02-28	1.9
1994-03-31	1.8
1994-04-30	0.7
1994-05-31	2
1994-06-30	2.6
1994-07-31	5.6
1994-08-31	6.4
1994-09-30	6.9
1994-10-31	5.5
1994-11-30	8.6
1994-12-31	8.7
1995-01-31	11
1995-02-28	7.1
1995-03-31	9.2
1995-04-30	7.5
1995-05-31	10.1
1995-06-30	5.8
1995-07-31	9.8
1995-08-31	6.7
1995-09-30	8.9
1995-10-31	6.7
1995-11-30	9.2
1995-12-31	10.9
1996-01-31	11.4
1996-02-29	11.8
1996-03-31	10.1
1996-04-30	6.8
1996-05-31	7.5
1996-06-30	7.5
1996-07-31	11
1996-08-31	8.8
1996-09-30	8
1996-10-31	8.5
1996-11-30	12.2
1996-12-31	7.2
1997-01-31	9.4
1997-02-28	8.7
1997-03-31	13.3
1997-04-30	6.6
1997-05-31	8.6
1997-06-30	9.6
1997-07-31	11.7
1997-08-31	5.2
1997-09-30	4.3
1997-10-31	2.9
1997-11-30	9.1
1997-12-31	8.2
1998-01-31	11.1
1998-02-28	13.2
1998-03-31	11.6
1998-04-30	10.1
1998-05-31	5.8
1998-06-30	6.7
1998-07-31	9.6
1998-08-31	6.9
1998-09-30	8.8
1998-10-31	5.7
1998-11-30	6.5
1998-12-31	3.7
1999-01-31	5.4
1999-02-28	8
1999-03-31	9.9
1999-04-30	9.3
1999-05-31	5.4
1999-06-30	8.3
1999-07-31	5.4
1999-08-31	8.9
1999-09-30	5.5
1999-10-31	8.1
1999-11-30	9.6
1999-12-31	11.2
2000-01-31	9.7
2000-02-29	10.2
2000-03-31	16
2000-04-30	16.2
2000-05-31	17.1
2000-06-30	10.4
2000-07-31	9.7
2000-08-31	12.1
2000-09-30	11
2000-10-31	13.7
2000-11-30	7.9
2000-12-31	8.6
2001-01-31	7.3
2001-02-28	8
2001-03-31	12
2001-04-30	7.5
2001-05-31	5.7
2001-06-30	7.8
2001-07-31	9.3
2001-08-31	13.2
2001-09-30	5.7
2001-10-31	11
2001-11-30	6.9
2001-12-31	5.2
2002-01-31	4.1
2002-02-28	4.1
2002-03-31	8.8
2002-04-30	4.9
2002-05-31	8.1
2002-06-30	8.6
2002-07-31	8.4
2002-08-31	8.4
2002-09-30	11.8
2002-10-31	18
2002-11-30	16.3
2002-12-31	8.1
2003-01-31	4.6
2003-02-28	4.6
2003-03-31	7.1
2003-04-30	9.2
2003-05-31	9
2003-06-30	11.3
2003-07-31	10.1
2003-08-31	8.3
2003-09-30	9.7
2003-10-31	14.8
2003-11-30	16.3
2003-12-31	12.9
2004-01-31	11.8
2004-02-29	10.1
2004-03-31	10.6
2004-04-30	7.3
2004-05-31	8.4
2004-06-30	11.1
2004-07-31	12.2
2004-08-31	14.3
2004-09-30	15.3
2004-10-31	15.3
2004-11-30	11.1
2004-12-31	8.9
2005-01-31	9.2
2005-02-28	9.9
2005-03-31	9.5
2005-04-30	7.1
2005-05-31	10
2005-06-30	9.3
2005-07-31	12
2005-08-31	9.2
2005-09-30	14
2005-10-31	12.3
2005-11-30	11
2005-12-31	9.2
2006-01-31	8.2
2006-02-28	12.4
2006-03-31	13.5
2006-04-30	18.2
2006-05-31	18
2006-06-30	20.9
2006-07-31	18.1
2006-08-31	17.6
2006-09-30	11.7
2006-10-31	8.9
2006-11-30	9.7
2006-12-31	7.2
2007-01-31	13.7
2007-02-28	12.7
2007-03-31	14.5
2007-04-30	10.6
2007-05-31	12.6
2007-06-30	12.7
2007-07-31	14.1
2007-08-31	15.7
2007-09-30	19.3
2007-10-31	16.6
2007-11-30	11.5
2007-12-31	6
2008-01-31	9.2
2008-02-29	10.9
2008-03-31	12.5
2008-04-30	11.8
2008-05-31	8.9
2008-06-30	17.9
2008-07-31	14.2
2008-08-31	19.2
2008-09-30	14.5
2008-10-31	23.9
2008-11-30	19.3
2008-12-31	13.1
2009-01-31	7.7
2009-02-28	11.4
2009-03-31	15.1
2009-04-30	4.5
2009-05-31	0.2
2009-06-30	-5.8
2009-07-31	-2
2009-08-31	-1.7
2009-09-30	3.7
2009-10-31	10.5
2009-11-30	8.6
2009-12-31	3
2010-01-31	0
2010-02-28	-1.4
2010-03-31	1.3
2010-04-30	-5
2010-05-31	-2.4
2010-06-30	-2.2
2010-07-31	-2
2010-08-31	-6
2010-09-30	-3.9
2010-10-31	3.1
2010-11-30	3.8
2010-12-31	-5.4
2011-01-31	-9
2011-02-28	-5.1
2011-03-31	1.6
2011-04-30	3.9
2011-05-31	1.1
2011-06-30	2.1
2011-07-31	-2.4
2011-08-31	0.4
2011-09-30	-1.5
2011-10-31	-4.6
2011-11-30	-7.4
2011-12-31	-8.9
2012-01-31	-6.8
2012-02-29	-8.5
2012-03-31	-8.4
2012-04-30	-5.3
2012-05-31	-3.7
2012-06-30	-6.5
2012-07-31	-8.5
2012-08-31	-6.9
2012-09-30	-0.8
2012-10-31	0.8
2012-11-30	1.9
2012-12-31	5.3
2013-01-31	4.3
2013-02-28	2
2013-03-31	-5
2013-04-30	-5.3
2013-05-31	-4.8
2013-06-30	-3.8
2013-07-31	-2.2
2013-08-31	1.8
2013-09-30	4.5
2013-10-31	1.9
2013-11-30	0
2013-12-31	-6.9
2014-01-31	-5.8
2014-02-28	-6.7
2014-03-31	-9.6
2014-04-30	-11.3
2014-05-31	-11
2014-06-30	-2
2014-07-31	2.3
2014-08-31	1.5
2014-09-30	0.3
2014-10-31	-2.4
2014-11-30	-3.5
2014-12-31	-2.7
2015-01-31	-2.6
2015-02-28	-1.6
2015-03-31	-0.5