Month Percent 1980-01-01 -2.000000000 1980-02-01 26.000000000 1980-03-01 25.000000000 1980-04-01 2.000000000 1980-05-01 -1.000000000 1980-06-01 -19.000000000 1980-07-01 7.000000000 1980-08-01 -7.000000000 1980-09-01 0.000000000 1980-10-01 26.000000000 1980-11-01 5.000000000 1980-12-01 -17.000000000 1981-01-01 -12.000000000 1981-02-01 21.000000000 1981-03-01 14.000000000 1981-04-01 7.000000000 1981-05-01 -7.000000000 1981-06-01 -11.000000000 1981-07-01 12.000000000 1981-08-01 -6.000000000 1981-09-01 10.000000000 1981-10-01 -2.000000000 1981-11-01 8.000000000 1981-12-01 -19.000000000 1982-01-01 -13.000000000 1982-02-01 20.000000000 1982-03-01 14.000000000 1982-04-01 -4.000000000 1982-05-01 -5.000000000 1982-06-01 -5.000000000 1982-07-01 1.000000000 1982-08-01 11.000000000 1982-09-01 2.000000000 1982-10-01 0.000000000 1982-11-01 3.000000000 1982-12-01 -24.000000000 1983-01-01 -19.000000000 1983-02-01 6.000000000 1983-03-01 -9.000000000 1983-04-01 -14.000000000 1983-05-01 -8.000000000 1983-06-01 2.000000000 1983-07-01 7.000000000 1983-08-01 17.000000000 1983-09-01 16.000000000 1983-10-01 17.000000000 1983-11-01 9.000000000 1983-12-01 0.000000000 1984-01-01 -11.000000000 1984-02-01 34.000000000 1984-03-01 27.000000000 1984-04-01 -13.000000000 1984-05-01 19.000000000 1984-06-01 -8.000000000 1984-07-01 -8.000000000 1984-08-01 19.000000000 1984-09-01 3.000000000 1984-10-01 14.000000000 1984-11-01 20.000000000 1984-12-01 -9.000000000 1985-01-01 -13.000000000 1985-02-01 23.000000000 1985-03-01 5.000000000 1985-04-01 3.000000000 1985-05-01 10.000000000 1985-06-01 -21.000000000 1985-07-01 8.000000000 1985-08-01 6.000000000 1985-09-01 10.000000000 1985-10-01 17.000000000 1985-11-01 8.000000000 1985-12-01 -6.000000000 1986-01-01 1.000000000 1986-02-01 27.000000000 1986-03-01 15.000000000 1986-04-01 29.000000000 1986-05-01 4.000000000 1986-06-01 -6.000000000 1986-07-01 23.000000000 1986-08-01 -1.000000000 1986-09-01 21.000000000 1986-10-01 24.000000000 1986-11-01 14.000000000 1986-12-01 3.000000000 1987-01-01 -2.000000000 1987-02-01 22.000000000 1987-03-01 18.000000000 1987-04-01 7.000000000 1987-05-01 17.000000000 1987-06-01 9.000000000 1987-07-01 18.000000000 1987-08-01 8.000000000 1987-09-01 22.000000000 1987-10-01 21.000000000 1987-11-01 21.000000000 1987-12-01 5.000000000 1988-01-01 -8.000000000 1988-02-01 27.000000000 1988-03-01 14.000000000 1988-04-01 5.000000000 1988-05-01 4.000000000 1988-06-01 5.000000000 1988-07-01 -13.000000000 1988-08-01 8.000000000 1988-09-01 -1.000000000 1988-10-01 -14.000000000 1988-11-01 15.000000000 1988-12-01 -3.000000000 1989-01-01 -14.000000000 1989-02-01 13.000000000 1989-03-01 8.000000000 1989-04-01 12.000000000 1989-05-01 1.000000000 1989-06-01 6.000000000 1989-07-01 -10.000000000 1989-08-01 10.000000000 1989-09-01 -11.000000000 1989-10-01 6.000000000 1989-11-01 21.000000000 1989-12-01 1.000000000 1990-01-01 -10.000000000 1990-02-01 24.000000000 1990-03-01 13.000000000 1990-04-01 0.000000000 1990-05-01 18.000000000 1990-06-01 -6.000000000 1990-07-01 5.000000000 1990-08-01 18.000000000 1990-09-01 -1.000000000 1990-10-01 19.000000000 1990-11-01 19.000000000 1990-12-01 2.000000000 1991-01-01 -15.000000000 1991-02-01 5.000000000 1991-03-01 -16.000000000 1991-04-01 20.000000000 1991-05-01 4.000000000 1991-06-01 -14.000000000 1991-07-01 -1.000000000 1991-08-01 -2.000000000 1991-09-01 -6.000000000 1991-10-01 22.000000000 1991-11-01 11.000000000 1991-12-01 -2.000000000 1992-01-01 -8.000000000 1992-02-01 18.000000000 1992-03-01 18.000000000 1992-04-01 7.000000000 1992-05-01 15.000000000 1992-06-01 3.000000000 1992-07-01 25.000000000 1992-08-01 12.000000000 1992-09-01 26.000000000 1992-10-01 22.000000000 1992-11-01 11.000000000 1992-12-01 1.000000000 1993-01-01 -8.000000000 1993-02-01 25.000000000 1993-03-01 26.000000000 1993-04-01 3.000000000 1993-05-01 -3.000000000 1993-06-01 -6.000000000 1993-07-01 -3.000000000 1993-08-01 5.000000000 1993-09-01 18.000000000 1993-10-01 9.000000000 1993-11-01 19.000000000 1993-12-01 -7.000000000 1994-01-01 -10.000000000 1994-02-01 25.000000000 1994-03-01 15.000000000 1994-04-01 10.000000000 1994-05-01 6.000000000 1994-06-01 0.000000000 1994-07-01 -6.000000000 1994-08-01 14.000000000 1994-09-01 14.000000000 1994-10-01 14.000000000 1994-11-01 22.000000000 1994-12-01 -6.000000000 1995-01-01 -17.000000000 1995-02-01 11.000000000 1995-03-01 15.000000000 1995-04-01 -22.000000000 1995-05-01 -1.000000000 1995-06-01 -19.000000000 1995-07-01 -21.000000000 1995-08-01 5.000000000 1995-09-01 -2.000000000 1995-10-01 5.000000000 1995-11-01 11.000000000 1995-12-01 -21.000000000 1996-01-01 -19.000000000 1996-02-01 5.000000000 1996-03-01 -14.000000000 1996-04-01 -25.000000000 1996-05-01 -14.000000000 1996-06-01 -32.558139530 1996-07-01 -8.042895442 1996-08-01 -17.426273460 1996-09-01 -8.985507246 1996-10-01 -0.588235294 1996-11-01 -2.702702703 1996-12-01 -21.921921920 1997-01-01 -17.352941180 1997-02-01 -2.153846154 1997-03-01 -20.520231210 1997-04-01 9.356725146 1997-05-01 -5.000000000 1997-06-01 -25.132275130 1997-07-01 9.000000000 1997-08-01 -20.000000000 1997-09-01 12.000000000 1997-10-01 17.000000000 1997-11-01 9.000000000 1997-12-01 4.000000000 1998-01-01 -13.000000000 1998-02-01 16.000000000 1998-03-01 3.000000000 1998-04-01 -4.000000000 1998-05-01 -22.000000000 1998-06-01 -30.000000000 1998-07-01 -14.000000000 1998-08-01 -38.000000000 1998-09-01 -10.000000000 1998-10-01 -20.000000000 1998-11-01 -24.000000000 1998-12-01 -32.000000000 1999-01-01 -39.000000000 1999-02-01 -16.000000000 1999-03-01 -24.000000000 1999-04-01 -31.000000000 1999-05-01 -28.000000000 1999-06-01 -18.000000000 1999-07-01 -9.000000000 1999-08-01 9.000000000 1999-09-01 18.000000000 1999-10-01 13.000000000 1999-11-01 11.000000000 1999-12-01 -11.000000000 2000-01-01 -15.000000000 2000-02-01 21.000000000 2000-03-01 22.000000000 2000-04-01 -9.000000000 2000-05-01 13.000000000 2000-06-01 -5.000000000 2000-07-01 -4.000000000 2000-08-01 25.000000000 2000-09-01 15.000000000 2000-10-01 14.000000000 2000-11-01 16.000000000 2000-12-01 1.000000000 2001-01-01 -7.000000000 2001-02-01 11.000000000 2001-03-01 14.000000000 2001-04-01 -21.000000000 2001-05-01 4.000000000 2001-06-01 -19.000000000 2001-07-01 -11.000000000 2001-08-01 -2.000000000 2001-09-01 -16.000000000 2001-10-01 10.000000000 2001-11-01 7.000000000 2001-12-01 -13.000000000 2002-01-01 -5.000000000 2002-02-01 -3.000000000 2002-03-01 -14.000000000 2002-04-01 21.000000000 2002-05-01 -6.000000000 2002-06-01 -20.000000000 2002-07-01 6.000000000 2002-08-01 0.000000000 2002-09-01 4.000000000 2002-10-01 21.000000000 2002-11-01 4.000000000 2002-12-01 -4.000000000 2003-01-01 -17.000000000 2003-02-01 -4.000000000 2003-03-01 12.000000000 2003-04-01 -4.000000000 2003-05-01 18.000000000 2003-06-01 -16.000000000 2003-07-01 32.000000000 2003-08-01 1.000000000 2003-09-01 25.000000000 2003-10-01 29.000000000 2003-11-01 3.000000000 2003-12-01 11.000000000 2004-01-01 -6.000000000 2004-02-01 24.000000000 2004-03-01 34.000000000 2004-04-01 14.000000000 2004-05-01 2.000000000 2004-06-01 2.000000000 2004-07-01 6.000000000 2004-08-01 12.000000000 2004-09-01 12.000000000 2004-10-01 16.000000000 2004-11-01 16.000000000 2004-12-01 4.000000000 2005-01-01 -21.000000000 2005-02-01 19.000000000 2005-03-01 6.000000000 2005-04-01 13.000000000 2005-05-01 -9.000000000 2005-06-01 11.000000000 2005-07-01 -8.000000000 2005-08-01 18.000000000 2005-09-01 13.000000000 2005-10-01 9.000000000 2005-11-01 16.000000000 2005-12-01 10.000000000 2006-01-01 -4.901960784 2006-02-01 30.448717950 2006-03-01 39.297124600 2006-04-01 2.839116719 2006-05-01 23.322683710 2006-06-01 21.604938270 2006-07-01 11.003236250 2006-08-01 35.000000000 2006-09-01 30.246913580 2006-10-01 21.913580250 2006-11-01 24.528301890 2006-12-01 4.942965779 2007-01-01 -3.409090909 2007-02-01 18.947368420 2007-03-01 37.412587410 2007-04-01 -10.000000000 2007-05-01 15.497076020 2007-06-01 3.353658537 2007-07-01 11.974110030 2007-08-01 20.414201180 2007-09-01 11.666666670 2007-10-01 25.490196080 2007-11-01 18.681318680 2007-12-01 -6.291390728 2008-01-01 -17.666666670 2008-02-01 16.312056740 2008-03-01 -20.189274450 2008-04-01 6.271777003 2008-05-01 -26.000000000 2008-06-01 -18.000000000 2008-07-01 -2.000000000 2008-08-01 -25.000000000 2008-09-01 3.000000000 2008-10-01 -8.000000000 2008-11-01 -19.000000000 2008-12-01 -21.000000000 2009-01-01 -36.000000000 2009-02-01 -1.000000000 2009-03-01 2.000000000 2009-04-01 -30.198019800 2009-05-01 -23.214285710 2009-06-01 -17.870722430 2009-07-01 -3.787878788 2009-08-01 -8.461538462 2009-09-01 -6.270627063 2009-10-01 2.877697842 2009-11-01 8.837209302 2009-12-01 -1.694915254 2010-01-01 -13.758389260 2010-02-01 14.195583600 2010-03-01 11.824324320 2010-04-01 -6.622516556 2010-05-01 -10.294117650 2010-06-01 -7.719298246 2010-07-01 1.000000000 2010-08-01 11.612903230 2010-09-01 7.570977918 2010-10-01 5.396825397 2010-11-01 20.677966100 2010-12-01 6.666666667 2011-01-01 -9.246575342 2011-02-01 12.542372880 2011-03-01 29.830508470 2011-04-01 -7.565789474 2011-05-01 12.162162160 2011-06-01 -8.852459016 2011-07-01 -7.868852459 2011-08-01 11.744966440 2011-09-01 14.814814810 2011-10-01 4.697986577 2011-11-01 27.388535030 2011-12-01 -4.347826087 2012-01-01 -11.148648650 2012-02-01 14.675767920 2012-03-01 12.881355930 2012-04-01 -16.065573770 2012-05-01 5.050505051 2012-06-01 -11.437908500 2012-07-01 -8.080808081 2012-08-01 3.525641026 2012-09-01 -4.207119741 2012-10-01 5.050505051 2012-11-01 6.000000000 2012-12-01 -11.148648650 2013-01-01 -19.727891160 2013-02-01 -2.980132450 2013-03-01 -22.333333330 2013-04-01 9.240924092 2013-05-01 -11.764705880 2013-06-01 -14.046822740 2013-07-01 -0.343642612 2013-08-01 -11.409395970 2013-09-01 12.244897960 2013-10-01 12.203389830 2013-11-01 1.010101010 2013-12-01 -7.333333333 2014-01-01 -20.069204150 2014-02-01 2.447552448 2014-03-01 11.945392490 2014-04-01 2.950819672 2014-05-01 9.933774834 2014-06-01 -20.846905540 2014-07-01 4.778156997 2014-08-01 -7.260726073 2014-09-01 16.000000000 2014-10-01 8.053691275 2014-11-01 -7.000000000 2014-12-01 -5.498281787 2015-01-01 -33.333333330 2015-02-01 5.802047782 2015-03-01 3.311258278 2015-04-01 -5.369127517 2015-05-01 -3.728813559 2015-06-01 -8.503401361 2015-07-01 3.378378378 2015-08-01 -4.713804714 2015-09-01 12.418300650 2015-10-01 10.544217690 2015-11-01 2.310231023 2015-12-01 -7.508532423 2016-01-01 -26.510067110 2016-02-01 11.301369860 2016-03-01 -1.013513514 2016-04-01 4.436860068 2016-05-01 0.336700337 2016-06-01 -2.675585284 2016-07-01 -20.666666670 2016-08-01 5.000000000 2016-09-01 -3.606557377 2016-10-01 -10.810810810 2016-11-01 4.026845638 2016-12-01 -9.933774834 2017-01-01 -30.067567570 2017-02-01 -3.973509934 2017-03-01 -6.493506494 2017-04-01 -29.967426710 2017-05-01 -19.032258060 2017-06-01 -25.249169440 2017-07-01 -21.404682270 2017-08-01 5.263157895 2017-09-01 -18.210862620 2017-10-01 -6.143344710 2017-11-01 -0.342465753 2017-12-01 -12.333333330 2018-01-01 -25.732899020 2018-02-01 3.424657534 2018-03-01 -5.111821086 2018-04-01 3.960396040 2018-05-01 -1.324503311 2018-06-01 -16.828478960 2018-07-01 -3.691275168 2018-08-01 9.797297297 2018-09-01 -4.501607717