Month Percent 1996-01-31 6.3 1996-02-29 6.27 1996-03-31 5.98 1996-04-30 6.05 1996-05-31 5.98 1996-06-30 5.65 1996-07-31 5.77 1996-08-31 5.7 1996-09-30 5.77 1996-10-31 6.03 1996-11-30 5.83 1996-12-31 5.95 1997-01-31 5.98 1997-02-28 5.83 1997-03-31 5.95 1997-04-30 5.91 1997-05-31 6.165 1997-06-30 6.345 1997-07-31 6.675 1997-08-31 6.965 1997-09-30 6.975 1997-10-31 6.975 1997-11-30 7.21 1997-12-31 7.205 1998-01-31 7.21 1998-02-28 7.175 1998-03-31 7.225 1998-04-30 7.14 1998-05-31 7.115 1998-06-30 7.255 1998-07-31 7.375 1998-08-31 7.145 1998-09-30 7.375 1998-10-31 7.105 1998-11-30 6.575 1998-12-31 5.6 1999-01-31 5.955 1999-02-28 5.575 1999-03-31 5.075 1999-04-30 5.15 1999-05-31 5.175 1999-06-30 4.75 1999-07-31 4.975 1999-08-31 4.795 1999-09-30 5.215 1999-10-31 5.055 1999-11-30 5.505 1999-12-31 3.75 2000-01-31 5.795 2000-02-29 5.925 2000-03-31 5.705 2000-04-30 5.82 2000-05-31 5.875 2000-06-30 5.495 2000-07-31 5.685 2000-08-31 5.725 2000-09-30 5.905 2000-10-31 5.845 2000-11-30 5.825 2000-12-31 5.175 2001-01-31 5.975 2001-02-28 5.7 2001-03-31 6 2001-04-30 5.35 2001-05-31 5.3 2001-06-30 4.85 2001-07-31 5.325 2001-08-31 4.4 2001-09-30 5.15 2001-10-31 4.05 2001-11-30 4.1 2001-12-31 4.2 2002-01-31 3.85 2002-02-28 3.8 2002-03-31 3.5 2002-04-30 3.8 2002-05-31 4.03 2002-06-30 3.65 2002-07-31 3.85 2002-08-31 3.95 2002-09-30 3.7 2002-10-31 3.6 2002-11-30 3.95 2002-12-31 4.25 2003-01-31 3.8 2003-02-28 3.55 2003-03-31 3.7 2003-04-30 3.5 2003-05-31 3.8 2003-06-30 3.55 2003-07-31 3.3 2003-08-31 3.4 2003-09-30 3.45 2003-10-31 3.2 2003-11-30 3.65 2003-12-31 3.65 2004-01-31 3.5 2004-02-29 3.9 2004-03-31 3.75 2004-04-30 3.85 2004-05-31 4.25 2004-06-30 4.5 2004-07-31 4.3 2004-08-31 4.725 2004-09-30 4.7 2004-10-31 4.655 2004-11-30 4.775 2004-12-31 4.725 2005-01-31 4.725 2005-02-28 4.75 2005-03-31 4.74 2005-04-30 4.765 2005-05-31 4.725 2005-06-30 4.725 2005-07-31 4.64 2005-08-31 4.505 2005-09-30 4.445 2005-10-31 4.425 2005-11-30 4.52 2005-12-31 4.575 2006-01-31 4.485 2006-02-28 4.45 2006-03-31 4.525 2006-04-30 4.445 2006-05-31 4.555 2006-06-30 4.485 2006-07-31 4.5 2006-08-31 4.735 2006-09-30 4.795 2006-10-31 4.82 2006-11-30 5.045 2006-12-31 4.985 2007-01-31 5.255 2007-02-28 5.245 2007-03-31 5.285 2007-04-30 5.235 2007-05-31 5.52 2007-06-30 5.875 2007-07-31 5.725 2007-08-31 6.05 2007-09-30 5.825 2007-10-31 5.745 2007-11-30 5.785 2007-12-31 5.875 2008-01-31 5.415 2008-02-29 5.255 2008-03-31 5.175 2008-04-30 5.065 2008-05-31 5.07 2008-06-30 5.165 2008-07-31 5.075 2008-08-31 5.04 2008-09-30 4.875 2008-10-31 4.2 2008-11-30 2.45 2008-12-31 1.7 2009-01-31 1.425 2009-02-28 0.825 2009-03-31 0.625 2009-04-30 0.475 2009-05-31 0.5 2009-06-30 0.5 2009-07-31 0.375 2009-08-31 0.435 2009-09-30 0.455 2009-10-31 0.445 2009-11-30 0.46 2009-12-31 0.485 2010-01-31 0.475 2010-02-28 0.495 2010-03-31 0.475 2010-04-30 0.485 2010-05-31 0.485 2010-06-30 0.525 2010-07-31 0.53 2010-08-31 0.52 2010-09-30 0.535 2010-10-31 0.56 2010-11-30 0.535 2010-12-31 0.535 2011-01-31 0.52 2011-02-28 0.5 2011-03-31 0.525 2011-04-30 0.54 2011-05-31 0.525 2011-06-30 0.535 2011-07-31 0.53 2011-08-31 0.525 2011-09-30 0.505 2011-10-31 0.505 2011-11-30 0.45 2011-12-31 0.2 2012-01-31 0.455 2012-02-29 0.47 2012-03-31 0.445 2012-04-30 0.415 2012-05-31 0.465 2012-06-30 0.48 2012-07-31 0.445 2012-08-31 0.44 2012-09-30 0.445 2012-10-31 0.375 2012-11-30 0.44 2012-12-31 0.305 2013-01-31 0.415 2013-02-28 0.395 2013-03-31 0.455 2013-04-30 0.43 2013-05-31 0.45 2013-06-30 0.41 2013-07-31 0.435 2013-08-31 0.38 2013-09-30 0.39 2013-10-31 0.385 2013-11-30 0.385 2013-12-31 0.2 2014-01-31 0.4 2014-02-28 0.395 2014-03-31 0.37 2014-04-30 0.3 2014-05-31 0.435 2014-06-30 0.32 2014-07-31 0.285 2014-08-31 0.385 2014-09-30 0.47 2014-10-31 0.475 2014-11-30 0.48 2014-12-31 0.375 2015-01-31 0.485 2015-02-28 0.445 2015-03-31 0.475 2015-04-30 0.5 2015-05-31 0.5 2015-06-30 0.525 2015-07-31 0.52 2015-08-31 0.495 2015-09-30 0.465 2015-10-31 0.5 2015-11-30 0.505 2015-12-31 0.27 2016-01-31 0.51 2016-02-29 0.525 2016-03-31 0.55 2016-04-30 0.52 2016-05-31 0.52 2016-06-30 0.53 2016-07-31 0.46 2016-08-31 0.27 2016-09-30 0.25 2016-10-31 0.265 2016-11-30 0.255 2016-12-31 0.2 2017-01-31 0.26 2017-02-28 0.25 2017-03-31 0.215 2017-04-30 0.235 2017-05-31 0.235 2017-06-30 0.235 2017-07-31 0.24 2017-08-31 0.195 2017-09-30 0.2 2017-10-31 0.375 2017-11-30 0.47 2017-12-31 0.43 2018-01-31 0.475 2018-02-28 0.46 2018-03-31 0.405 2018-04-30 0.47 2018-05-31 0.48 2018-06-30 0.49