Month	Percent
1980-06-01	18.800000000
1980-07-01	19.000000000
1980-08-01	17.200000000
1980-09-01	14.900000000
1980-10-01	15.000000000
1980-11-01	13.100000000
1980-12-01	15.300000000
1981-01-01	15.800000000
1981-02-01	13.700000000
1981-03-01	18.800000000
1981-04-01	14.700000000
1981-05-01	13.700000000
1981-06-01	15.300000000
1981-07-01	18.400000000
1981-08-01	18.300000000
1981-09-01	16.800000000
1981-10-01	17.700000000
1981-11-01	15.700000000
1981-12-01	15.100000000
1982-01-01	17.800000000
1982-02-01	19.500000000
1982-03-01	21.700000000
1982-04-01	22.000000000
1982-05-01	23.100000000
1982-06-01	16.500000000
1982-07-01	12.500000000
1982-08-01	22.300000000
1982-09-01	23.300000000
1982-10-01	17.800000000
1982-11-01	13.400000000
1982-12-01	15.000000000
1983-01-01	15.800000000
1983-02-01	16.900000000
1983-03-01	19.600000000
1983-04-01	21.000000000
1983-05-01	22.500000000
1983-06-01	18.500000000
1983-07-01	15.800000000
1983-08-01	16.200000000
1983-09-01	13.300000000
1983-10-01	15.300000000
1983-11-01	14.400000000
1983-12-01	12.500000000
1984-01-01	11.800000000
1984-02-01	14.400000000
1984-03-01	16.300000000
1984-04-01	14.400000000
1984-05-01	15.800000000
1984-06-01	16.300000000
1984-07-01	15.200000000
1984-08-01	16.000000000
1984-09-01	16.200000000
1984-10-01	15.700000000
1984-11-01	16.000000000
1984-12-01	16.000000000
1985-01-01	15.800000000
1985-02-01	15.200000000
1985-03-01	18.100000000
1985-04-01	17.400000000
1985-05-01	16.700000000
1985-06-01	16.700000000
1985-07-01	16.300000000
1985-08-01	17.200000000
1985-09-01	17.400000000
1985-10-01	16.800000000
1985-11-01	18.700000000
1985-12-01	18.400000000
1986-01-01	17.200000000
1986-02-01	18.600000000
1986-03-01	21.700000000
1986-04-01	21.700000000
1986-05-01	21.300000000
1986-06-01	22.100000000
1986-07-01	21.900000000
1986-08-01	17.900000000
1986-09-01	16.000000000
1986-10-01	16.300000000
1986-11-01	17.800000000
1986-12-01	21.200000000
1987-01-01	15.800000000
1987-02-01	16.900000000
1987-03-01	22.800000000
1987-04-01	17.900000000
1987-05-01	16.600000000
1987-06-01	15.700000000
1987-07-01	13.500000000
1987-08-01	13.200000000
1987-09-01	11.000000000
1987-10-01	16.800000000
1987-11-01	15.800000000
1987-12-01	16.000000000
1988-01-01	15.600000000
1988-02-01	15.100000000
1988-03-01	16.500000000
1988-04-01	15.500000000
1988-05-01	16.600000000
1988-06-01	17.000000000
1988-07-01	14.000000000
1988-08-01	12.500000000
1988-09-01	11.300000000
1988-10-01	15.800000000
1988-11-01	19.800000000
1988-12-01	20.900000000
1989-01-01	16.100000000
1989-02-01	19.900000000
1989-03-01	19.700000000
1989-04-01	19.800000000
1989-05-01	19.300000000
1989-06-01	21.000000000
1989-07-01	21.200000000
1989-08-01	18.700000000
1989-09-01	14.900000000
1989-10-01	15.400000000
1989-11-01	18.800000000
1989-12-01	19.300000000
1990-01-01	17.900000000
1990-02-01	16.000000000
1990-03-01	17.100000000
1990-04-01	28.200000000
1990-05-01	26.300000000
1990-06-01	22.200000000
1990-07-01	18.300000000
1990-08-01	13.800000000
1990-09-01	19.100000000
1990-10-01	19.400000000
1990-11-01	16.700000000
1990-12-01	23.300000000
1991-01-01	28.500000000
1991-02-01	26.700000000
1991-03-01	21.200000000
1991-04-01	18.900000000
1991-05-01	22.800000000
1991-06-01	17.800000000
1991-07-01	23.200000000
1991-08-01	20.100000000
1991-09-01	20.200000000
1991-10-01	18.700000000
1991-11-01	26.100000000
1991-12-01	28.600000000
1992-01-01	22.700000000
1992-02-01	26.800000000
1992-03-01	24.100000000
1992-04-01	16.700000000
1992-05-01	13.500000000
1992-06-01	22.300000000
1992-07-01	21.300000000
1992-08-01	19.600000000
1992-09-01	30.700000000
1992-10-01	31.900000000
1992-11-01	24.200000000
1992-12-01	28.700000000
1993-01-01	26.100000000
1993-02-01	25.300000000
1993-03-01	26.500000000
1993-04-01	22.700000000
1993-05-01	21.400000000
1993-06-01	21.300000000
1993-07-01	23.300000000
1993-08-01	23.000000000
1993-09-01	25.000000000
1993-10-01	27.900000000
1993-11-01	19.200000000
1993-12-01	19.900000000
1994-01-01	19.500000000
1994-02-01	19.900000000
1994-03-01	19.800000000
1994-04-01	19.200000000
1994-05-01	68.900000000
1994-06-01	27.600000000
1994-07-01	19.300000000
1994-08-01	18.200000000
1994-09-01	18.400000000
1994-10-01	18.300000000
1994-11-01	18.000000000
1994-12-01	17.500000000
1995-01-01	16.900000000
1995-02-01	16.800000000
1995-03-01	17.000000000
1995-04-01	16.600000000
1995-05-01	16.000000000
1995-06-01	15.900000000
1995-07-01	15.500000000
1995-08-01	15.300000000
1995-09-01	15.600000000
1995-10-01	15.100000000
1995-11-01	14.900000000
1995-12-01	14.400000000
1996-01-01	13.917545450
1996-02-01	13.751450000
1996-03-01	13.770200000
1996-04-01	13.588750000
1996-05-01	13.433954550
1996-06-01	13.642277780
1996-07-01	13.260782610
1996-08-01	12.844666670
1996-09-01	12.586142860
1996-10-01	12.780045450
1996-11-01	13.278238100
1996-12-01	12.837894740
1997-01-01	12.401571430
1997-02-01	12.125050000
1997-03-01	11.742315790
1997-04-01	10.758800000
1997-05-01	10.617428570
1997-06-01	11.733900000
1997-07-01	11.664043480
1997-08-01	11.636600000
1997-09-01	10.945000000
1997-10-01	16.879318180
1997-11-01	23.743700000
1997-12-01	11.035095240
1998-01-01	15.066650000
1998-02-01	13.020300000
1998-03-01	13.174950000
1998-04-01	11.910150000
1998-05-01	11.866450000
1998-06-01	13.436952380
1998-07-01	12.259652170
1998-08-01	12.361952380
1998-09-01	11.733181820
1998-10-01	11.927000000
1998-11-01	12.339619050
1998-12-01	11.940090910
1999-01-01	11.425105260
1999-02-01	10.180684210
1999-03-01	10.147409090
1999-04-01	10.151450000
1999-05-01	10.402900000
1999-06-01	10.382227270
1999-07-01	10.328909090
1999-08-01	10.280409090
1999-09-01	10.334909090
1999-10-01	10.620300000
1999-11-01	10.791227270
1999-12-01	9.830454545
2000-01-01	9.402450000
2000-02-01	9.171238095
2000-03-01	9.091545455
2000-04-01	8.472736842
2000-05-01	8.645909091
2000-06-01	8.414666667
2000-07-01	7.991047619
2000-08-01	8.262318182
2000-09-01	7.910142857
2000-10-01	7.790318182
2000-11-01	7.581363636
2000-12-01	6.158210526
2001-01-01	4.755900000
2001-02-01	4.992500000
2001-03-01	4.781400000
2001-04-01	5.064200000
2001-05-01	4.653600000
2001-06-01	4.539500000
2001-07-01	4.505500000
2001-08-01	4.491300000
2001-09-01	3.986500000
2001-10-01	3.971300000
2001-11-01	3.507300000
2001-12-01	3.338900000
2002-01-01	3.293600000
2002-02-01	3.283000000
2002-03-01	3.264000000
2002-04-01	3.316200000
2002-05-01	3.310000000
2002-06-01	3.348500000
2002-07-01	3.301700000
2002-08-01	3.292700000
2002-09-01	3.318600000
2002-10-01	3.300400000
2002-11-01	3.304300000
2002-12-01	3.094500000
2003-01-01	2.786800000
2003-02-01	2.763500000
2003-03-01	2.749000000
2003-04-01	2.560500000
2003-05-01	2.557100000
2003-06-01	2.213300000
2003-07-01	2.078300000
2003-08-01	2.098100000
2003-09-01	2.020900000
2003-10-01	2.014800000
2003-11-01	1.973000000
2003-12-01	2.056700000
2004-01-01	2.021400000
2004-02-01	2.031500000
2004-03-01	2.005700000
2004-04-01	2.078000000
2004-05-01	2.015200000
2004-06-01	2.027700000
2004-07-01	2.067700000
2004-08-01	2.040500000
2004-09-01	2.051800000
2004-10-01	2.111400000
2004-11-01	2.085000000
2004-12-01	2.053500000
2005-01-01	2.077100000
2005-02-01	2.058500000
2005-03-01	2.056700000
2005-04-01	2.075700000
2005-05-01	2.070000000
2005-06-01	2.062300000
2005-07-01	2.072900000
2005-08-01	2.060900000
2005-09-01	2.094100000
2005-10-01	2.067100000
2005-11-01	2.085900000
2005-12-01	2.275700000
2006-01-01	2.326400000
2006-02-01	2.349500000
2006-03-01	2.520000000
2006-04-01	2.628300000
2006-05-01	2.576800000
2006-06-01	2.697700000
2006-07-01	2.813800000
2006-08-01	2.968300000
2006-09-01	3.041000000
2006-10-01	3.278200000
2006-11-01	3.327700000
2006-12-01	3.501100000
2007-01-01	3.563200000
2007-02-01	3.569500000
2007-03-01	3.690900000
2007-04-01	3.819500000
2007-05-01	3.790500000
2007-06-01	3.955700000
2007-07-01	4.063200000
2007-08-01	4.047400000
2007-09-01	4.028600000
2007-10-01	3.941400000
2007-11-01	4.022100000
2007-12-01	3.879100000
2008-01-01	4.021800000
2008-02-01	4.027900000
2008-03-01	4.091000000
2008-04-01	3.986800000
2008-05-01	4.009700000
2008-06-01	4.006700000
2008-07-01	4.190800000
2008-08-01	4.298900000
2008-09-01	4.273300000
2008-10-01	3.819800000
2008-11-01	3.150200000
2008-12-01	2.486400000
2009-01-01	1.812200000
2009-02-01	1.257100000
2009-03-01	1.062000000
2009-04-01	0.841900000
2009-05-01	0.782100000
2009-06-01	0.698000000
2009-07-01	0.357600000
2009-08-01	0.347500000
2009-09-01	0.363200000
2009-10-01	0.358700000
2009-11-01	0.362400000
2009-12-01	0.354600000
2010-01-01	0.344000000
2010-02-01	0.340600000
2010-03-01	0.347700000
2010-04-01	0.353300000
2010-05-01	0.343900000
2010-06-01	0.354300000
2010-07-01	0.481100000
2010-08-01	0.425600000
2010-09-01	0.453600000
2010-10-01	0.701300000
2010-11-01	0.592600000
2010-12-01	0.498100000
2011-01-01	0.659000000
2011-02-01	0.707100000
2011-03-01	0.658700000
2011-04-01	0.966100000
2011-05-01	1.033400000
2011-06-01	1.124000000
2011-07-01	1.011800000
2011-08-01	0.905800000
2011-09-01	1.005500000
2011-10-01	0.959600000
2011-11-01	0.790000000
2011-12-01	0.627000000
2012-01-01	0.380000000
2012-02-01	0.365600000
2012-03-01	0.356700000
2012-04-01	0.345100000
2012-05-01	0.337000000
2012-06-01	0.332000000
2012-07-01	0.184200000
2012-08-01	0.110100000
2012-09-01	0.099300000
2012-10-01	0.090700000
2012-11-01	0.078500000
2012-12-01	0.073400000
2013-01-01	0.069000000
2013-02-01	0.067700000
2013-03-01	0.067000000
2013-04-01	0.081000000
2013-05-01	0.078700000
2013-06-01	0.086200000
2013-07-01	0.093100000
2013-08-01	0.082000000
2013-09-01	0.080300000
2013-10-01	0.093300000
2013-11-01	0.103100000
2013-12-01	0.168600000
2014-01-01	0.196100000
2014-02-01	0.156700000
2014-03-01	0.191900000
2014-04-01	0.253900000
2014-05-01	0.248000000
2014-06-01	0.075800000
2014-07-01	0.043300000
2014-08-01	0.017900000
2014-09-01	0.006600000
2014-10-01	-0.004500000
2014-11-01	-0.011600000
2014-12-01	-0.030100000
2015-01-01	-0.050600000
2015-02-01	-0.036000000
2015-03-01	-0.050400000
2015-04-01	-0.074500000
2015-05-01	-0.105800000
2015-06-01	-0.118500000
2015-07-01	-0.117700000
2015-08-01	-0.121300000
2015-09-01	-0.135700000
2015-10-01	-0.138900000
2015-11-01	-0.134700000
2015-12-01	-0.199000000
2016-01-01	-0.238700000
2016-02-01	-0.240400000
2016-03-01	-0.287700000
2016-04-01	-0.337800000
2016-05-01	-0.338000000
2016-06-01	-0.332500000
2016-07-01	-0.328800000
2016-08-01	-0.338800000
2016-09-01	-0.343000000
2016-10-01	-0.346600000
2016-11-01	-0.348700000
2016-12-01	-0.350400000
2017-01-01	-0.351500000
2017-02-01	-0.352800000
2017-03-01	-0.353500000
2017-04-01	-0.356900000
2017-05-01	-0.358900000
2017-06-01	-0.358700000
2017-07-01	-0.359500000
2017-08-01	-0.355800000
2017-09-01	-0.358100000
2017-10-01	-0.359000000
2017-11-01	-0.349200000
2017-12-01	-0.342300000
2018-01-01	-0.362400000
2018-02-01	-0.364700000
2018-03-01	-0.363900000
2018-04-01	-0.365700000
2018-05-01	-0.362500000
2018-06-01	-0.361800000
2018-07-01	-0.363600000
2018-08-01	-0.359100000
2018-09-01	-0.362700000
2018-10-01	-0.366000000