Month Percent 1999-01-31 4.28 1999-02-28 4.01 1999-03-31 3.83 1999-04-30 3.6 1999-05-31 3.48 1999-06-30 3.31 1999-07-31 3.41 1999-08-31 3.35 1999-09-30 3.39 1999-10-31 3.53 1999-11-30 3.65 1999-12-31 3.56 2000-01-31 3.81 2000-02-29 4.04 2000-03-31 4.12 2000-04-30 4.22 2000-05-31 4.28 2000-06-30 4.2 2000-07-31 4.18 2000-08-31 4.29 2000-09-30 4.3 2000-10-31 4.29 2000-11-30 4.42 2000-12-31 4.18 2001-01-31 4.13 2001-02-28 4.2 2001-03-31 3.98 2001-04-30 3.83 2001-05-31 3.72 2001-06-30 3.6 2001-07-31 3.68 2001-08-31 3.48 2001-09-30 3.33 2001-10-31 3.04 2001-11-30 2.71 2001-12-31 2.58 2002-01-31 2.5 2002-02-28 2.52 2002-03-31 2.56 2002-04-30 2.49 2002-05-31 2.51 2002-06-30 2.51 2002-07-31 2.42 2002-08-31 2.46 2002-09-30 2.53 2002-10-31 2.42 2002-11-30 2.38 2002-12-31 2.52 2003-01-31 2.5 2003-02-28 2.33 2003-03-31 2.31 2003-04-30 2.26 2003-05-31 2.26 2003-06-30 2.23 2003-07-31 2 2003-08-31 1.93 2003-09-30 1.97 2003-10-31 1.96 2003-11-30 2.04 2003-12-31 2.19 2004-01-31 2.5 2004-02-29 2.64 2004-03-31 2.76 2004-04-30 2.82 2004-05-31 2.93 2004-06-30 3.35 2004-07-31 3.47 2004-08-31 3.67 2004-09-30 3.74 2004-10-31 3.7 2004-11-30 3.68 2004-12-31 3.76 2005-01-31 3.78 2005-02-28 3.79 2005-03-31 3.81 2005-04-30 3.79 2005-05-31 3.75 2005-06-30 3.83 2005-07-31 3.78 2005-08-31 3.6 2005-09-30 3.56 2005-10-31 3.5 2005-11-30 3.51 2005-12-31 3.51 2006-01-31 3.49 2006-02-28 3.5 2006-03-31 3.53 2006-04-30 3.46 2006-05-31 3.46 2006-06-30 3.49 2006-07-31 3.48 2006-08-31 3.66 2006-09-30 3.77 2006-10-31 3.78 2006-11-30 3.91 2006-12-31 4.04 2007-01-31 4.16 2007-02-28 4.25 2007-03-31 4.32 2007-04-30 4.23 2007-05-31 4.31 2007-06-30 4.55 2007-07-31 4.62 2007-08-31 4.68 2007-09-30 4.69 2007-10-31 4.67 2007-11-30 4.67 2007-12-31 4.59 2008-01-31 4.53 2008-02-29 4.35 2008-03-31 4.28 2008-04-30 4.12 2008-05-31 4.01 2008-06-30 4.03 2008-07-31 4.02 2008-08-31 4.01 2008-09-30 4.02 2008-10-31 3.71 2008-11-30 2.45 2008-12-31 1.48 2009-01-31 1 2009-02-28 0.69 2009-03-31 0.46 2009-04-30 0.41 2009-05-31 0.4 2009-06-30 0.4 2009-07-31 0.42 2009-08-31 0.4 2009-09-30 0.44 2009-10-31 0.41 2009-11-30 0.42 2009-12-31 0.43 2010-01-31 0.42 2010-02-28 0.43 2010-03-31 0.43 2010-04-30 0.43 2010-05-31 0.43 2010-06-30 0.43 2010-07-31 0.42 2010-08-31 0.43 2010-09-30 0.44 2010-10-31 0.41 2010-11-30 0.44 2010-12-31 0.44 2011-01-31 0.42 2011-02-28 0.43 2011-03-31 0.43 2011-04-30 0.41 2011-05-31 0.43 2011-06-30 0.43 2011-07-31 0.42 2011-08-31 0.41 2011-09-30 0.41 2011-10-31 0.42 2011-11-30 0.43 2011-12-31 0.46 2012-01-31 0.49 2012-02-29 0.46 2012-03-31 0.47 2012-04-30 0.49 2012-05-31 0.47 2012-06-30 0.45 2012-07-31 0.45 2012-08-31 0.44 2012-09-30 0.47 2012-10-31 0.46 2012-11-30 0.47 2012-12-31 0.49 2013-01-31 0.5 2013-02-28 0.52 2013-03-31 0.49 2013-04-30 0.52 2013-05-31 0.5 2013-06-30 0.5 2013-07-31 0.5 2013-08-31 0.5 2013-09-30 0.51 2013-10-31 0.51 2013-11-30 0.5 2013-12-31 0.5 2014-01-31 0.49 2014-02-28 0.48 2014-03-31 0.49 2014-04-30 0.49 2014-05-31 0.41 2014-06-30 0.4 2014-07-31 0.38 2014-08-31 0.39 2014-09-30 0.38 2014-10-31 0.38 2014-11-30 0.37 2014-12-31 0.38 2015-01-31 0.37 2015-02-28 0.37 2015-03-31 0.38 2015-04-30 0.37 2015-05-31 0.35 2015-06-30 0.37 2015-07-31 0.35 2015-08-31 0.34 2015-09-30 0.37 2015-10-31 0.33 2015-11-30 0.35 2015-12-31 0.37 2016-01-31 0.34 2016-02-29 0.36 2016-03-31 0.35 2016-04-30 0.33 2016-05-31 0.35 2016-06-30 0.35 2016-07-31 0.34 2016-08-31 0.27 2016-09-30 0.25 2016-10-31 0.23 2016-11-30 0.23 2016-12-31 0.21 2017-01-31 0.17 2017-02-28 0.16 2017-03-31 0.18 2017-04-30 0.15 2017-05-31 0.16 2017-06-30 0.16 2017-07-31 0.15 2017-08-31 0.15 2017-09-30 0.14 2017-10-31 0.14 2017-11-30 0.23 2017-12-31 0.26 2018-01-31 0.29 2018-02-28 0.28 2018-03-31 0.26 2018-04-30 0.25 2018-05-31 0.25 2018-06-30 0.26 2018-07-31 0.25 2018-08-31 0.33 2018-09-30 0.35 2018-10-31 0.39 2018-11-30 0.4 2018-12-31 0.41 2019-01-31 0.41 2019-02-28 0.41 2019-03-31 0.42 2019-04-30 0.42 2019-05-31 0.41 2019-06-30 0.41 2019-07-31 0.4 2019-08-31 0.41 2019-09-30 0.43 2019-10-31 0.43 2019-11-30 0.42 2019-12-31 0.43 2020-01-31 0.43 2020-02-29 0.41 2020-03-31 0.32 2020-04-30 0.26 2020-05-31 0.23 2020-06-30 0.13 2020-07-31 0.09 2020-08-31 0.09 2020-09-30 0.08 2020-10-31 0.07 2020-11-30 0.06 2020-12-31 0.06 2021-01-31 0.06 2021-02-28 0.05 2021-03-31 0.05 2021-04-30 0.05 2021-05-31 0.04 2021-06-30 0.04 2021-07-31 0.05 2021-08-31 0.04 2021-09-30 0.04 2021-10-31 0.04 2021-11-30 0.04 2021-12-31 0.05 2022-01-31 0.07 2022-02-28 0.11 2022-03-31 0.15 2022-04-30 0.19 2022-05-31 0.25 2022-06-30 0.3 2022-07-31 0.32 2022-08-31 0.46 2022-09-30 0.57 2022-10-31 0.7 2022-11-30 1.06 2022-12-31 1.21 2023-01-31 1.44 2023-02-28 1.63 2023-03-31 1.7 2023-04-30 1.9 2023-05-31 1.92 2023-06-30 2.17 2023-07-31 2.34 2023-08-31 2.49 2023-09-30 2.6 2023-10-31 2.56 2023-11-30 2.57 2023-12-31 2.62