Month Percent 1996-10-31 13.3 1996-11-30 17.9 1996-12-31 11.9 1997-01-31 3.9 1997-02-28 1.2 1997-03-31 0.8 1997-04-30 -1.7 1997-05-31 2.1 1997-06-30 7.4 1997-07-31 8.2 1997-08-31 2.2 1997-09-30 -1.6 1997-10-31 2.1 1997-11-30 4.1 1997-12-31 3.8 1998-01-31 3.8 1998-02-28 14.8 1998-03-31 11.6 1998-04-30 6.1 1998-05-31 -0.1 1998-06-30 4 1998-07-31 3.5 1998-08-31 -0.4 1998-09-30 3.1 1998-10-31 7.2 1998-11-30 13.1 1998-12-31 7.2 1999-01-31 10.4 1999-02-28 6.5 1999-03-31 8 1999-04-30 4.3 1999-05-31 1.3 1999-06-30 0.7 1999-07-31 -4 1999-08-31 -5.1 1999-09-30 1.5 1999-10-31 6.2 1999-11-30 11.2 1999-12-31 12.5 2000-01-31 12.7 2000-02-29 19.8 2000-03-31 22.2 2000-04-30 29.7 2000-05-31 31.1 2000-06-30 16.5 2000-07-31 9.6 2000-08-31 4.2 2000-09-30 16.8 2000-10-31 12 2000-11-30 3.8 2000-12-31 -3.4 2001-01-31 4.9 2001-02-28 11.2 2001-03-31 14.8 2001-04-30 8.5 2001-05-31 1.9 2001-06-30 8.3 2001-07-31 5.5 2001-08-31 11.3 2001-09-30 5.6 2001-10-31 9.7 2001-11-30 9.5 2001-12-31 2.1 2002-01-31 0.3 2002-02-28 -1.6 2002-03-31 4 2002-04-30 1.7 2002-05-31 4.7 2002-06-30 0.4 2002-07-31 0.1 2002-08-31 3.3 2002-09-30 7.4 2002-10-31 16.1 2002-11-30 15 2002-12-31 17.1 2003-01-31 11.9 2003-02-28 9.3 2003-03-31 8.6 2003-04-30 9.5 2003-05-31 9.9 2003-06-30 11.2 2003-07-31 7 2003-08-31 3 2003-09-30 -0.2 2003-10-31 3.5 2003-11-30 10.2 2003-12-31 8.1 2004-01-31 14.8 2004-02-29 12.8 2004-03-31 7.3 2004-04-30 -0.4 2004-05-31 -0.6 2004-06-30 4.5 2004-07-31 9.4 2004-08-31 5.6 2004-09-30 14.8 2004-10-31 12.1 2004-11-30 5 2004-12-31 2.4 2005-01-31 12.5 2005-02-28 21.6 2005-03-31 21.9 2005-04-30 16 2005-05-31 19.5 2005-06-30 25.5 2005-07-31 22.7 2005-08-31 16.7 2005-09-30 15.1 2005-10-31 11.1 2005-11-30 17.6 2005-12-31 9.5 2006-01-31 11.4 2006-02-28 7.8 2006-03-31 18.8 2006-04-30 20 2006-05-31 25.5 2006-06-30 20.3 2006-07-31 29.3 2006-08-31 26.7 2006-09-30 25.5 2006-10-31 12 2006-11-30 13.3 2006-12-31 11.4 2007-01-31 16 2007-02-28 15.4 2007-03-31 18.3 2007-04-30 18.8 2007-05-31 19.7 2007-06-30 17.7 2007-07-31 24.2 2007-08-31 22.1 2007-09-30 21.8 2007-10-31 15.8 2007-11-30 15.3 2007-12-31 10 2008-01-31 3.8 2008-02-29 9.2 2008-03-31 10.8 2008-04-30 16.7 2008-05-31 8.7 2008-06-30 11.5 2008-07-31 8.2 2008-08-31 7.3 2008-09-30 1.3 2008-10-31 -1.2 2008-11-30 -4.2 2008-12-31 -7.8 2009-01-31 -3.9 2009-02-28 1.2 2009-03-31 5.3 2009-04-30 -2.1 2009-05-31 -3.8 2009-06-30 -5 2009-07-31 -5.8 2009-08-31 -7.1 2009-09-30 -6.2 2009-10-31 -1.9 2009-11-30 -1.4 2009-12-31 -3.5 2010-01-31 -1.3 2010-02-28 -3.8 2010-03-31 -2.2 2010-04-30 -5.4 2010-05-31 -4.7 2010-06-30 -4.2 2010-07-31 -3.7 2010-08-31 -4.1 2010-09-30 -3.6 2010-10-31 -3.7 2010-11-30 -1.3 2010-12-31 -2.8 2011-01-31 0.1 2011-02-28 1.9 2011-03-31 1.1 2011-04-30 -0.4 2011-05-31 -6.2 2011-06-30 -0.7 2011-07-31 -2.8 2011-08-31 -3.6 2011-09-30 -4.8 2011-10-31 -5.2 2011-11-30 0.1 2011-12-31 -6.7 2012-01-31 -3.1 2012-02-29 -4.9 2012-03-31 1.4 2012-04-30 -2.1 2012-05-31 -4.1 2012-06-30 -4.6 2012-07-31 -5 2012-08-31 -3.2 2012-09-30 -2.5 2012-10-31 -1.3 2012-11-30 -0.1 2012-12-31 -4.9 2013-01-31 0.7 2013-02-28 -2.4 2013-03-31 2.3 2013-04-30 -4.9 2013-05-31 -5.3 2013-06-30 -7.3 2013-07-31 -3 2013-08-31 -0.1 2013-09-30 1.9 2013-10-31 2.4 2013-11-30 3.3 2013-12-31 1.2 2014-01-31 0.7 2014-02-28 0.2 2014-03-31 -1.4 2014-04-30 -4.8 2014-05-31 -2.8 2014-06-30 -1.1 2014-07-31 0.5 2014-08-31 -0.9 2014-09-30 0.4 2014-10-31 -1.3 2014-11-30 -2.3 2014-12-31 -3.9 2015-01-31 -1.7 2015-02-28 1 2015-03-31 4.1