Month Percent 1980-01-01 -7.000000000 1980-02-01 23.000000000 1980-03-01 16.000000000 1980-04-01 1.000000000 1980-05-01 6.000000000 1980-06-01 -14.000000000 1980-07-01 11.000000000 1980-08-01 -16.000000000 1980-09-01 6.000000000 1980-10-01 15.000000000 1980-11-01 5.000000000 1980-12-01 -10.000000000 1981-01-01 -14.000000000 1981-02-01 16.000000000 1981-03-01 15.000000000 1981-04-01 4.000000000 1981-05-01 -2.000000000 1981-06-01 -11.000000000 1981-07-01 15.000000000 1981-08-01 -1.000000000 1981-09-01 5.000000000 1981-10-01 8.000000000 1981-11-01 10.000000000 1981-12-01 -19.000000000 1982-01-01 -13.000000000 1982-02-01 16.000000000 1982-03-01 13.000000000 1982-04-01 -5.000000000 1982-05-01 -1.000000000 1982-06-01 -7.000000000 1982-07-01 2.000000000 1982-08-01 8.000000000 1982-09-01 6.000000000 1982-10-01 2.000000000 1982-11-01 4.000000000 1982-12-01 -18.000000000 1983-01-01 -22.000000000 1983-02-01 5.000000000 1983-03-01 -6.000000000 1983-04-01 -16.000000000 1983-05-01 -9.000000000 1983-06-01 -1.000000000 1983-07-01 0.000000000 1983-08-01 14.000000000 1983-09-01 14.000000000 1983-10-01 15.000000000 1983-11-01 20.000000000 1983-12-01 -5.000000000 1984-01-01 -17.000000000 1984-02-01 25.000000000 1984-03-01 26.000000000 1984-04-01 -11.000000000 1984-05-01 19.000000000 1984-06-01 -12.000000000 1984-07-01 -4.000000000 1984-08-01 14.000000000 1984-09-01 -1.000000000 1984-10-01 14.000000000 1984-11-01 9.000000000 1984-12-01 -13.000000000 1985-01-01 -22.000000000 1985-02-01 12.000000000 1985-03-01 10.000000000 1985-04-01 -6.000000000 1985-05-01 11.000000000 1985-06-01 -15.000000000 1985-07-01 1.000000000 1985-08-01 3.000000000 1985-09-01 7.000000000 1985-10-01 14.000000000 1985-11-01 7.000000000 1985-12-01 -11.000000000 1986-01-01 -8.000000000 1986-02-01 16.000000000 1986-03-01 9.000000000 1986-04-01 24.000000000 1986-05-01 8.000000000 1986-06-01 -7.000000000 1986-07-01 20.000000000 1986-08-01 2.000000000 1986-09-01 16.000000000 1986-10-01 18.000000000 1986-11-01 13.000000000 1986-12-01 1.000000000 1987-01-01 -13.000000000 1987-02-01 21.000000000 1987-03-01 19.000000000 1987-04-01 7.000000000 1987-05-01 15.000000000 1987-06-01 7.000000000 1987-07-01 15.000000000 1987-08-01 8.000000000 1987-09-01 23.000000000 1987-10-01 17.000000000 1987-11-01 21.000000000 1987-12-01 0.000000000 1988-01-01 -12.000000000 1988-02-01 27.000000000 1988-03-01 16.000000000 1988-04-01 3.000000000 1988-05-01 8.000000000 1988-06-01 7.000000000 1988-07-01 -7.000000000 1988-08-01 7.000000000 1988-09-01 -1.000000000 1988-10-01 -10.000000000 1988-11-01 8.000000000 1988-12-01 -6.000000000 1989-01-01 -19.000000000 1989-02-01 11.000000000 1989-03-01 9.000000000 1989-04-01 12.000000000 1989-05-01 8.000000000 1989-06-01 3.000000000 1989-07-01 -3.000000000 1989-08-01 7.000000000 1989-09-01 -5.000000000 1989-10-01 6.000000000 1989-11-01 17.000000000 1989-12-01 -9.000000000 1990-01-01 -16.000000000 1990-02-01 25.000000000 1990-03-01 21.000000000 1990-04-01 -5.000000000 1990-05-01 16.000000000 1990-06-01 -6.000000000 1990-07-01 4.000000000 1990-08-01 13.000000000 1990-09-01 6.000000000 1990-10-01 17.000000000 1990-11-01 16.000000000 1990-12-01 -4.000000000 1991-01-01 -19.000000000 1991-02-01 1.000000000 1991-03-01 -10.000000000 1991-04-01 19.000000000 1991-05-01 3.000000000 1991-06-01 -14.000000000 1991-07-01 0.000000000 1991-08-01 -6.000000000 1991-09-01 -2.000000000 1991-10-01 20.000000000 1991-11-01 9.000000000 1991-12-01 -5.000000000 1992-01-01 -17.000000000 1992-02-01 16.000000000 1992-03-01 11.000000000 1992-04-01 -7.000000000 1992-05-01 16.000000000 1992-06-01 3.000000000 1992-07-01 26.000000000 1992-08-01 8.000000000 1992-09-01 23.000000000 1992-10-01 23.000000000 1992-11-01 10.000000000 1992-12-01 1.000000000 1993-01-01 -16.000000000 1993-02-01 23.000000000 1993-03-01 30.000000000 1993-04-01 -1.000000000 1993-05-01 0.000000000 1993-06-01 -4.000000000 1993-07-01 0.000000000 1993-08-01 0.000000000 1993-09-01 17.000000000 1993-10-01 9.000000000 1993-11-01 17.000000000 1993-12-01 -9.000000000 1994-01-01 -17.000000000 1994-02-01 19.000000000 1994-03-01 18.000000000 1994-04-01 8.000000000 1994-05-01 9.000000000 1994-06-01 1.000000000 1994-07-01 -4.000000000 1994-08-01 16.000000000 1994-09-01 15.000000000 1994-10-01 15.000000000 1994-11-01 25.000000000 1994-12-01 -8.000000000 1995-01-01 -18.000000000 1995-02-01 11.000000000 1995-03-01 17.000000000 1995-04-01 -17.000000000 1995-05-01 7.000000000 1995-06-01 -18.000000000 1995-07-01 -14.000000000 1995-08-01 0.000000000 1995-09-01 -3.000000000 1995-10-01 4.000000000 1995-11-01 8.000000000 1995-12-01 -17.000000000 1996-01-01 -19.000000000 1996-02-01 11.000000000 1996-03-01 -12.000000000 1996-04-01 -23.000000000 1996-05-01 -10.000000000 1996-06-01 -32.175925930 1996-07-01 -14.361702130 1996-08-01 -12.732095490 1996-09-01 -5.187319885 1996-10-01 0.879765396 1996-11-01 -3.582089552 1996-12-01 -22.455089820 1997-01-01 -19.420289860 1997-02-01 -2.153846154 1997-03-01 -18.443804030 1997-04-01 12.827988340 1997-05-01 -4.000000000 1997-06-01 -21.372031660 1997-07-01 8.000000000 1997-08-01 -18.828496040 1997-09-01 10.000000000 1997-10-01 14.000000000 1997-11-01 9.000000000 1997-12-01 3.000000000 1998-01-01 -22.000000000 1998-02-01 7.000000000 1998-03-01 2.000000000 1998-04-01 -3.000000000 1998-05-01 -19.000000000 1998-06-01 -28.000000000 1998-07-01 -14.000000000 1998-08-01 -34.000000000 1998-09-01 -12.000000000 1998-10-01 -11.000000000 1998-11-01 -20.000000000 1998-12-01 -32.000000000 1999-01-01 -40.000000000 1999-02-01 -16.000000000 1999-03-01 -20.000000000 1999-04-01 -30.000000000 1999-05-01 -26.000000000 1999-06-01 -21.000000000 1999-07-01 -12.000000000 1999-08-01 3.000000000 1999-09-01 17.000000000 1999-10-01 9.000000000 1999-11-01 12.000000000 1999-12-01 -3.000000000 2000-01-01 -20.000000000 2000-02-01 17.000000000 2000-03-01 19.000000000 2000-04-01 -9.000000000 2000-05-01 6.000000000 2000-06-01 -4.000000000 2000-07-01 -1.000000000 2000-08-01 24.000000000 2000-09-01 11.000000000 2000-10-01 13.000000000 2000-11-01 16.000000000 2000-12-01 -2.000000000 2001-01-01 -15.000000000 2001-02-01 9.000000000 2001-03-01 11.000000000 2001-04-01 -21.000000000 2001-05-01 5.000000000 2001-06-01 -19.000000000 2001-07-01 -6.000000000 2001-08-01 1.000000000 2001-09-01 -14.000000000 2001-10-01 12.000000000 2001-11-01 9.000000000 2001-12-01 -9.000000000 2002-01-01 -10.000000000 2002-02-01 0.000000000 2002-03-01 -18.000000000 2002-04-01 23.000000000 2002-05-01 -7.000000000 2002-06-01 -20.000000000 2002-07-01 10.000000000 2002-08-01 -4.000000000 2002-09-01 4.000000000 2002-10-01 24.000000000 2002-11-01 0.000000000 2002-12-01 1.000000000 2003-01-01 -17.000000000 2003-02-01 2.000000000 2003-03-01 11.000000000 2003-04-01 -2.000000000 2003-05-01 12.000000000 2003-06-01 -20.000000000 2003-07-01 26.000000000 2003-08-01 2.000000000 2003-09-01 24.000000000 2003-10-01 29.000000000 2003-11-01 2.000000000 2003-12-01 9.000000000 2004-01-01 -10.000000000 2004-02-01 18.000000000 2004-03-01 34.000000000 2004-04-01 3.000000000 2004-05-01 5.000000000 2004-06-01 2.000000000 2004-07-01 3.000000000 2004-08-01 10.000000000 2004-09-01 5.000000000 2004-10-01 10.000000000 2004-11-01 18.000000000 2004-12-01 8.000000000 2005-01-01 -21.000000000 2005-02-01 17.000000000 2005-03-01 7.000000000 2005-04-01 16.000000000 2005-05-01 -4.000000000 2005-06-01 8.000000000 2005-07-01 -4.000000000 2005-08-01 25.000000000 2005-09-01 8.000000000 2005-10-01 6.000000000 2005-11-01 22.000000000 2005-12-01 8.000000000 2006-01-01 -1.935483871 2006-02-01 21.019108280 2006-03-01 34.276729560 2006-04-01 -5.974842767 2006-05-01 20.000000000 2006-06-01 17.737003060 2006-07-01 10.967741940 2006-08-01 33.850931680 2006-09-01 30.886850150 2006-10-01 23.619631900 2006-11-01 25.000000000 2006-12-01 1.123595506 2007-01-01 -1.132075472 2007-02-01 20.761245670 2007-03-01 31.250000000 2007-04-01 -9.124087591 2007-05-01 13.832853030 2007-06-01 -3.939393939 2007-07-01 9.615384615 2007-08-01 20.000000000 2007-09-01 9.180327869 2007-10-01 24.271844660 2007-11-01 12.000000000 2007-12-01 -0.649350649 2008-01-01 -16.065573770 2008-02-01 12.676056340 2008-03-01 -18.125000000 2008-04-01 2.787456446 2008-05-01 -29.000000000 2008-06-01 -17.000000000 2008-07-01 0.000000000 2008-08-01 -25.000000000 2008-09-01 7.000000000 2008-10-01 -6.000000000 2008-11-01 -16.000000000 2008-12-01 -21.000000000 2009-01-01 -29.000000000 2009-02-01 -2.000000000 2009-03-01 1.000000000 2009-04-01 -27.403846150 2009-05-01 -10.762331840 2009-06-01 -17.164179100 2009-07-01 -3.745318352 2009-08-01 -12.595419850 2009-09-01 0.326797386 2009-10-01 2.816901408 2009-11-01 3.167420814 2009-12-01 -2.657807309 2010-01-01 -24.755700330 2010-02-01 14.860681110 2010-03-01 15.824915820 2010-04-01 -5.537459283 2010-05-01 -7.011070111 2010-06-01 -6.968641115 2010-07-01 -5.000000000 2010-08-01 8.360128617 2010-09-01 13.043478260 2010-10-01 3.416149068 2010-11-01 15.562913910 2010-12-01 7.975460123 2011-01-01 -16.498316500 2011-02-01 7.718120805 2011-03-01 25.827814570 2011-04-01 -10.576923080 2011-05-01 11.333333330 2011-06-01 -4.530744337 2011-07-01 0.645161290 2011-08-01 12.131147540 2011-09-01 15.841584160 2011-10-01 3.666666667 2011-11-01 18.611987380 2011-12-01 2.325581395 2012-01-01 -15.488215490 2012-02-01 16.333333330 2012-03-01 4.729729730 2012-04-01 -16.883116880 2012-05-01 -0.330033003 2012-06-01 -6.796116505 2012-07-01 -8.881578947 2012-08-01 -1.592356688 2012-09-01 -6.984126984 2012-10-01 6.622516556 2012-11-01 4.651162791 2012-12-01 -13.087248320 2013-01-01 -18.791946310 2013-02-01 -11.363636360 2013-03-01 -21.568627450 2013-04-01 6.687898089 2013-05-01 -7.236842105 2013-06-01 -24.919093850 2013-07-01 -5.704697987 2013-08-01 -15.460526320 2013-09-01 9.570957096 2013-10-01 8.881578947 2013-11-01 -2.295081967 2013-12-01 -0.967741935 2014-01-01 -20.735785950 2014-02-01 1.003344482 2014-03-01 11.111111110 2014-04-01 -0.645161290 2014-05-01 5.211726384 2014-06-01 -23.624595470 2014-07-01 1.342281879 2014-08-01 -9.090909091 2014-09-01 13.486842110 2014-10-01 3.559870550 2014-11-01 -5.263157895 2014-12-01 -4.026845638 2015-01-01 -31.699346410 2015-02-01 4.635761589 2015-03-01 3.236245955 2015-04-01 -5.980066445 2015-05-01 -5.666666667 2015-06-01 -7.692307692 2015-07-01 0.662251656 2015-08-01 -7.516339869 2015-09-01 11.038961040 2015-10-01 8.361204013 2015-11-01 4.620462046 2015-12-01 1.003344482 2016-01-01 -29.096989970 2016-02-01 8.724832215 2016-03-01 -0.996677741 2016-04-01 10.631229240 2016-05-01 -5.333333333 2016-06-01 -6.622516556 2016-07-01 -33.774834440 2016-08-01 4.666666667 2016-09-01 -1.607717042 2016-10-01 -6.375838926 2016-11-01 1.333333333 2016-12-01 -11.400651470 2017-01-01 -27.516778520 2017-02-01 -4.575163399 2017-03-01 -2.605863192 2017-04-01 -33.766233770 2017-05-01 -16.455696200 2017-06-01 -21.311475410 2017-07-01 -22.622950820 2017-08-01 1.633986928 2017-09-01 -11.746031750 2017-10-01 -8.000000000 2017-11-01 -1.986754967 2017-12-01 -11.960132890 2018-01-01 -27.652733120 2018-02-01 -2.000000000 2018-03-01 -5.974842767 2018-04-01 4.934210526 2018-05-01 -2.287581699 2018-06-01 -16.932907350 2018-07-01 -6.020066890 2018-08-01 8.278145695 2018-09-01 -6.940063091