Month Percent 1984-01-01 12.3800 1984-02-01 12.6900 1984-03-01 13.0000 1984-04-01 12.8100 1984-05-01 12.3800 1984-06-01 12.3800 1984-07-01 13.5000 1984-08-01 13.3800 1984-09-01 13.0000 1984-10-01 13.3100 1984-11-01 14.9400 1984-12-01 15.0000 1985-01-01 14.6900 1985-02-01 14.6900 1985-03-01 13.8600 1985-04-01 12.9400 1985-05-01 12.4400 1985-06-01 11.5600 1985-07-01 10.1800 1985-08-01 10.3100 1985-09-01 10.0600 1985-10-01 10.0600 1985-11-01 10.6200 1985-12-01 11.6900 1986-01-01 15.1200 1986-02-01 16.0600 1986-03-01 14.5000 1986-04-01 11.2500 1986-05-01 10.2500 1986-06-01 9.1900 1986-07-01 10.1200 1986-08-01 10.6200 1986-09-01 11.0000 1986-10-01 13.8800 1986-11-01 14.3800 1986-12-01 13.8800 1987-01-01 14.0600 1987-02-01 14.2500 1987-03-01 13.1200 1987-04-01 11.1900 1987-05-01 11.1200 1987-06-01 10.4400 1987-07-01 9.6900 1987-08-01 9.9400 1987-09-01 9.0000 1987-10-01 9.1900 1987-11-01 9.1900 1987-12-01 8.8100 1988-01-01 8.5600 1988-02-01 8.8800 1988-03-01 8.5600 1988-04-01 8.0600 1988-05-01 7.3100 1988-06-01 7.6900 1988-07-01 7.8100 1988-08-01 8.0600 1988-09-01 7.5600 1988-10-01 7.6200 1988-11-01 8.0600 1988-12-01 8.3800 1989-01-01 8.1900 1989-02-01 8.3100 1989-03-01 8.1900 1989-04-01 9.1900 1989-05-01 9.4400 1989-06-01 10.5000 1989-07-01 9.9400 1989-08-01 10.2200 1989-09-01 10.6900 1989-10-01 11.7500 1989-11-01 11.8800 1989-12-01 12.1200 1990-01-01 12.0000 1990-02-01 12.3100 1990-03-01 12.3100 1990-04-01 12.0000 1990-05-01 11.0600 1990-06-01 10.3100 1990-07-01 10.6900 1990-08-01 11.3100 1990-09-01 11.0000 1990-10-01 10.4400 1990-11-01 10.7500 1990-12-01 11.5000 1991-01-01 11.1900 1991-02-01 11.1200 1991-03-01 10.6900 1991-04-01 10.1900 1991-05-01 10.1900 1991-06-01 10.1200 1991-07-01 10.1600 1991-08-01 10.0000 1991-09-01 10.0600 1991-10-01 10.2200 1991-11-01 10.4400 1991-12-01 10.7500 1992-01-01 10.5000 1992-02-01 10.3800 1992-03-01 10.6900 1992-04-01 10.3800 1992-05-01 10.0000 1992-06-01 10.1200 1992-07-01 10.4400 1992-08-01 10.8100 1992-09-01 16.5000 1992-10-01 14.5000 1992-11-01 40.0000 1992-12-01 17.5000 1993-01-01 24.5000 1993-02-01 13.7900 1993-03-01 9.4000 1993-04-01 8.3800 1993-05-01 7.5600 1993-06-01 6.4800 1993-07-01 6.3300 1993-08-01 6.5600 1993-09-01 6.9300 1993-10-01 6.6400 1993-11-01 6.5200 1993-12-01 6.3400 1994-01-01 5.9100 1994-02-01 6.1400 1994-03-01 6.3100 1994-04-01 5.9900 1994-05-01 5.7500 1994-06-01 5.5600 1994-07-01 5.7500 1994-08-01 6.2500 1994-09-01 5.7500 1994-10-01 5.5000 1994-11-01 5.8100 1994-12-01 6.4400 1995-01-01 6.1300 1995-02-01 6.4400 1995-03-01 7.0000 1995-04-01 6.8100 1995-05-01 6.6300 1995-06-01 6.7500 1995-07-01 6.5000 1995-08-01 6.0800 1995-09-01 5.8800 1995-10-01 5.5800 1995-11-01 5.6900 1995-12-01 5.4800 1996-01-01 5.0900 1996-02-01 5.1300 1996-03-01 5.1000 1996-04-01 4.9600 1996-05-01 5.1300 1996-06-01 5.2400 1996-07-01 5.5700 1996-08-01 5.8400 1996-09-01 5.6900 1996-10-01 5.7000 1996-11-01 5.6800 1996-12-01 5.8900 1997-01-01 5.8400 1997-02-01 5.7600 1997-03-01 5.7300 1997-04-01 6.2500 1997-05-01 6.2000 1997-06-01 6.2500 1997-07-01 6.2600 1997-08-01 6.2300 1997-09-01 6.1700 1997-10-01 6.1400 1997-11-01 6.2000 1997-12-01 6.0700 1998-01-01 6.0500 1998-02-01 6.0500 1998-03-01 5.6600 1998-04-01 6.1400 1998-05-01 6.4200 1998-06-01 6.2000 1998-07-01 6.1900 1998-08-01 6.0800 1998-09-01 5.4200 1998-10-01 4.0100 1998-11-01 3.6700 1998-12-01 3.2200 1999-01-01 3.1321 1999-02-01 3.0934 1999-03-01 3.0467 1999-04-01 2.6965 1999-05-01 2.5790 1999-06-01 2.6267 1999-07-01 2.6765 1999-08-01 2.6950 1999-09-01 2.7267 1999-10-01 3.3757 1999-11-01 3.4677 1999-12-01 3.4460 2000-01-01 3.3431 2000-02-01 3.5368 2000-03-01 3.7470 2000-04-01 3.9253 2000-05-01 4.3620 2000-06-01 4.5017 2000-07-01 4.5829 2000-08-01 4.7771 2000-09-01 4.8528 2000-10-01 5.0413 2000-11-01 5.0920 2000-12-01 4.9392 2001-01-01 4.7707 2001-02-01 4.7558 2001-03-01 4.7086 2001-04-01 4.6820 2001-05-01 4.6367 2001-06-01 4.4536 2001-07-01 4.4671 2001-08-01 4.3535 2001-09-01 3.9829 2001-10-01 3.5999 2001-11-01 3.3857 2001-12-01 3.3449 2002-01-01 3.3388 2002-02-01 3.3571 2002-03-01 3.3908 2002-04-01 3.4069 2002-05-01 3.4671 2002-06-01 3.4640 2002-07-01 3.4100 2002-08-01 3.3519 2002-09-01 3.3101 2002-10-01 3.2613 2002-11-01 3.1241 2002-12-01 2.9410 2003-01-01 2.8318 2003-02-01 2.6875 2003-03-01 2.5300 2003-04-01 2.5333 2003-05-01 2.4005 2003-06-01 2.1519 2003-07-01 2.1300 2003-08-01 2.1404 2003-09-01 2.1473 2003-10-01 2.1436 2003-11-01 2.1590 2003-12-01 2.1463 2004-01-01 2.0895 2004-02-01 2.0705 2004-03-01 2.0288 2004-04-01 2.0488 2004-05-01 2.0859 2004-06-01 2.1127 2004-07-01 2.1160 2004-08-01 2.1143 2004-09-01 2.1186 2004-10-01 2.1473 2004-11-01 2.1703 2004-12-01 2.1732 2005-01-01 2.1454 2005-02-01 2.1383 2005-03-01 2.1372 2005-04-01 2.1372 2005-05-01 2.1256 2005-06-01 2.1110 2005-07-01 2.1194 2005-08-01 2.1325 2005-09-01 2.1391 2005-10-01 2.1966 2005-11-01 2.3609 2005-12-01 2.4729 2006-01-01 2.5117 2006-02-01 2.6004 2006-03-01 2.7226 2006-04-01 2.7938 2006-05-01 2.8890 2006-06-01 2.9857 2006-07-01 3.1022 2006-08-01 3.2265 2006-09-01 3.3354 2006-10-01 3.5020 2006-11-01 3.5972 2006-12-01 3.6842 2007-01-01 3.7519 2007-02-01 3.8182 2007-03-01 3.8909 2007-04-01 3.9753 2007-05-01 4.0714 2007-06-01 4.1478 2007-07-01 4.2162 2007-08-01 4.5436 2007-09-01 4.7417 2007-10-01 4.6874 2007-11-01 4.6385 2007-12-01 4.8484 2008-01-01 4.4815 2008-02-01 4.3621 2008-03-01 4.5964 2008-04-01 4.7835 2008-05-01 4.8574 2008-06-01 4.9405 2008-07-01 4.9610 2008-08-01 4.9652 2008-09-01 5.0192 2008-10-01 5.1131 2008-11-01 4.2383 2008-12-01 3.2926 2009-01-01 2.4565 2009-02-01 1.9431 2009-03-01 1.6355 2009-04-01 1.4223 2009-05-01 1.2817 2009-06-01 1.2279 2009-07-01 0.9750 2009-08-01 0.8605 2009-09-01 0.7721 2009-10-01 0.7375 2009-11-01 0.7162 2009-12-01 0.7120 2010-01-01 0.6797 2010-02-01 0.6617 2010-03-01 0.6450 2010-04-01 0.6447 2010-05-01 0.6865 2010-06-01 0.7276 2010-07-01 0.8488 2010-08-01 0.8955 2010-09-01 0.8805 2010-10-01 0.9977 2010-11-01 1.0420 2010-12-01 1.0217 2011-01-01 1.0172 2011-02-01 1.0867 2011-03-01 1.1755 2011-04-01 1.3212 2011-05-01 1.4251 2011-06-01 1.4886 2011-07-01 1.5976 2011-08-01 1.5521 2011-09-01 1.5365 2011-10-01 1.5759 2011-11-01 1.4847 2011-12-01 1.4261 2012-01-01 1.2222 2012-02-01 1.0483 2012-03-01 0.8585 2012-04-01 0.7443 2012-05-01 0.6849 2012-06-01 0.6589 2012-07-01 0.4970 2012-08-01 0.3324 2012-09-01 0.2463 2012-10-01 0.2079 2012-11-01 0.1920 2012-12-01 0.1855 2013-01-01 0.2049 2013-02-01 0.2234 2013-03-01 0.2061 2013-04-01 0.2089 2013-05-01 0.2012 2013-06-01 0.2103 2013-07-01 0.2214 2013-08-01 0.2259 2013-09-01 0.2232 2013-10-01 0.2258 2013-11-01 0.2234 2013-12-01 0.2735 2014-01-01 0.2920 2014-02-01 0.2881 2014-03-01 0.3053 2014-04-01 0.3297 2014-05-01 0.3246 2014-06-01 0.2414 2014-07-01 0.2050 2014-08-01 0.1916 2014-09-01 0.0971 2014-10-01 0.0826 2014-11-01 0.0809 2014-12-01 0.0809 2015-01-01 0.0627 2015-02-01 0.0482 2015-03-01 0.0272 2015-04-01 0.0047 2015-05-01 -0.0104 2015-06-01 -0.0139 2015-07-01 -0.0187 2015-08-01 -0.0277 2015-09-01 -0.0370 2015-10-01 -0.0536 2015-11-01 -0.0876 2015-12-01 -0.1263 2016-01-01 -0.1461 2016-02-01 -0.1836 2016-03-01 -0.2285 2016-04-01 -0.2492 2016-05-01 -0.2572 2016-06-01 -0.2679 2016-07-01 -0.2945 2016-08-01 -0.2982 2016-09-01 -0.3016 2016-10-01 -0.3090 2016-11-01 -0.3127 2016-12-01 -0.3158 2017-01-01 -0.3255 2017-02-01 -0.3286 2017-03-01 -0.3293 2017-04-01 -0.3304 2017-05-01 -0.3295 2017-06-01 -0.3300 2017-07-01 -0.3304 2017-08-01 -0.3291 2017-09-01 -0.3294 2017-10-01 -0.3295 2017-11-01 -0.3290 2017-12-01 -0.3279 2018-01-01 -0.3285 2018-02-01 -0.3285 2018-03-01 -0.3279 2018-04-01 -0.3285 2018-05-01 -0.3252 2018-06-01 -0.3220 2018-07-01 -0.3207 2018-08-01 -0.3190 2018-09-01 -0.3188 2018-10-01 -0.3177