Month	Percent
1979-01-01	9.000000000
1979-02-01	8.700000000
1979-03-01	9.300000000
1979-04-01	9.400000000
1979-05-01	8.900000000
1979-06-01	9.000000000
1979-07-01	8.900000000
1979-08-01	10.500000000
1979-09-01	13.000000000
1979-10-01	15.600000000
1979-11-01	13.600000000
1979-12-01	12.700000000
1980-01-01	11.800000000
1980-02-01	12.100000000
1980-03-01	14.200000000
1980-04-01	14.400000000
1980-05-01	12.700000000
1980-06-01	10.300000000
1980-07-01	10.200000000
1980-08-01	11.900000000
1980-09-01	13.000000000
1980-10-01	11.700000000
1980-11-01	12.700000000
1980-12-01	11.800000000
1981-01-01	11.400000000
1981-02-01	12.800000000
1981-03-01	12.300000000
1981-04-01	11.900000000
1981-05-01	12.700000000
1981-06-01	13.000000000
1981-07-01	12.800000000
1981-08-01	13.700000000
1981-09-01	13.600000000
1981-10-01	13.900000000
1981-11-01	14.000000000
1981-12-01	15.400000000
1982-01-01	13.800000000
1982-02-01	14.000000000
1982-03-01	15.200000000
1982-04-01	16.900000000
1982-05-01	17.100000000
1982-06-01	15.500000000
1982-07-01	16.500000000
1982-08-01	14.900000000
1982-09-01	14.800000000
1982-10-01	15.600000000
1982-11-01	15.400000000
1982-12-01	14.700000000
1983-01-01	13.600000000
1983-02-01	13.700000000
1983-03-01	14.000000000
1983-04-01	13.400000000
1983-05-01	13.700000000
1983-06-01	13.200000000
1983-07-01	13.100000000
1983-08-01	13.000000000
1983-09-01	13.100000000
1983-10-01	13.200000000
1983-11-01	13.000000000
1983-12-01	12.600000000
1984-01-01	13.000000000
1984-02-01	13.100000000
1984-03-01	13.400000000
1984-04-01	13.300000000
1984-05-01	12.900000000
1984-06-01	12.600000000
1984-07-01	12.600000000
1984-08-01	12.600000000
1984-09-01	13.300000000
1984-10-01	13.200000000
1984-11-01	13.100000000
1984-12-01	13.100000000
1985-01-01	12.600000000
1985-02-01	12.300000000
1985-03-01	12.600000000
1985-04-01	12.600000000
1985-05-01	12.700000000
1985-06-01	12.500000000
1985-07-01	12.600000000
1985-08-01	12.500000000
1985-09-01	12.500000000
1985-10-01	12.500000000
1985-11-01	12.400000000
1985-12-01	12.500000000
1986-01-01	13.070000000
1986-02-01	13.390000000
1986-03-01	13.240000000
1986-04-01	13.610000000
1986-05-01	15.010000000
1986-06-01	14.260000000
1986-07-01	14.540000000
1986-08-01	14.470000000
1986-09-01	14.360000000
1986-10-01	14.730000000
1986-11-01	15.150000000
1986-12-01	16.870000000
1987-01-01	16.500000000
1987-02-01	15.130000000
1987-03-01	14.670000000
1987-04-01	14.580000000
1987-05-01	14.580000000
1987-06-01	14.440000000
1987-07-01	14.260000000
1987-08-01	14.200000000
1987-09-01	13.940000000
1987-10-01	14.040000000
1987-11-01	14.920000000
1987-12-01	15.290000000
1988-01-01	14.610000000
1988-02-01	14.250000000
1988-03-01	14.240000000
1988-04-01	14.060000000
1988-05-01	13.510000000
1988-06-01	13.030000000
1988-07-01	13.280000000
1988-08-01	13.350000000
1988-09-01	13.520000000
1988-10-01	13.080000000
1988-11-01	13.210000000
1988-12-01	11.980000000
1989-01-01	11.490000000
1989-02-01	11.290000000
1989-03-01	11.360000000
1989-04-01	11.320000000
1989-05-01	10.990000000
1989-06-01	11.020000000
1989-07-01	11.120000000
1989-08-01	11.210000000
1989-09-01	10.990000000
1989-10-01	11.410000000
1989-11-01	11.900000000
1989-12-01	12.450000000
1990-01-01	11.950000000
1990-02-01	11.550000000
1990-03-01	11.960000000
1990-04-01	12.310000000
1990-05-01	11.760000000
1990-06-01	11.460000000
1990-07-01	11.120000000
1990-08-01	11.070000000
1990-09-01	10.820000000
1990-10-01	11.350000000
1990-11-01	11.460000000
1990-12-01	11.660000000
1991-01-01	11.510000000
1991-02-01	10.970000000
1991-03-01	10.710000000
1991-04-01	10.410000000
1991-05-01	10.110000000
1991-06-01	10.230000000
1991-07-01	10.410000000
1991-08-01	10.300000000
1991-09-01	10.540000000
1991-10-01	10.460000000
1991-11-01	10.320000000
1991-12-01	10.800000000
1992-01-01	10.620000000
1992-02-01	10.530000000
1992-03-01	10.360000000
1992-04-01	10.350000000
1992-05-01	10.410000000
1992-06-01	10.370000000
1992-07-01	10.520000000
1992-08-01	11.150000000
1992-09-01	15.130000000
1992-10-01	12.500000000
1992-11-01	14.630000000
1992-12-01	15.420000000
1993-01-01	10.590000000
1993-02-01	9.320000000
1993-03-01	8.790000000
1993-04-01	8.350000000
1993-05-01	7.320000000
1993-06-01	6.830000000
1993-07-01	6.480000000
1993-08-01	5.960000000
1993-09-01	6.340000000
1993-10-01	6.180000000
1993-11-01	5.450000000
1993-12-01	5.570000000
1994-01-01	5.360000000
1994-02-01	5.090000000
1994-03-01	5.250000000
1994-04-01	5.460000000
1994-05-01	5.150000000
1994-06-01	5.430000000
1994-07-01	5.530000000
1994-08-01	5.860000000
1994-09-01	6.680000000
1994-10-01	6.890000000
1994-11-01	7.270000000
1994-12-01	6.240000000
1995-01-01	5.760000000
1995-02-01	5.460000000
1995-03-01	5.390000000
1995-04-01	5.360000000
1995-05-01	5.670000000
1995-06-01	5.790000000
1995-07-01	5.620000000
1995-08-01	5.340000000
1995-09-01	5.360000000
1995-10-01	5.340000000
1995-11-01	5.220000000
1995-12-01	5.430000000
1996-01-01	5.480000000
1996-02-01	5.260000000
1996-03-01	4.920000000
1996-04-01	4.700000000
1996-05-01	4.760000000
1996-06-01	4.930000000
1996-07-01	4.990000000
1996-08-01	5.020000000
1996-09-01	5.090000000
1996-10-01	5.040000000
1996-11-01	4.390000000
1996-12-01	4.140000000
1997-01-01	3.520000000
1997-02-01	3.520000000
1997-03-01	3.510000000
1997-04-01	3.500000000
1997-05-01	3.460000000
1997-06-01	3.510000000
1997-07-01	4.000000000
1997-08-01	4.040000000
1997-09-01	3.940000000
1997-10-01	3.970000000
1997-11-01	3.950000000
1997-12-01	3.870000000
1998-01-01	3.820000000
1998-02-01	3.840000000
1998-03-01	4.080000000
1998-04-01	4.150000000
1998-05-01	4.470000000
1998-06-01	4.820000000
1998-07-01	5.350000000
1998-08-01	6.740000000
1998-09-01	8.030000000
1998-10-01	7.920000000
1998-11-01	7.960000000
1998-12-01	8.240000000
1999-01-01	7.720000000
1999-02-01	7.270000000
1999-03-01	6.880000000
1999-04-01	6.550000000
1999-05-01	6.660000000
1999-06-01	6.480000000
1999-07-01	6.350000000
1999-08-01	6.090000000
1999-09-01	5.970000000
1999-10-01	6.370000000
1999-11-01	6.150000000
1999-12-01	5.970000000
2000-01-01	5.880000000
2000-02-01	5.890000000
2000-03-01	6.000000000
2000-04-01	6.230000000
2000-05-01	6.500000000
2000-06-01	6.720000000
2000-07-01	6.910000000
2000-08-01	7.120000000
2000-09-01	7.330000000
2000-10-01	7.520000000
2000-11-01	7.430000000
2000-12-01	7.420000000
2001-01-01	7.410000000
2001-02-01	7.320000000
2001-03-01	7.390000000
2001-04-01	7.480000000
2001-05-01	7.450000000
2001-06-01	7.420000000
2001-07-01	7.370000000
2001-08-01	7.310000000
2001-09-01	7.140000000
2001-10-01	6.940000000
2001-11-01	6.900000000
2001-12-01	6.590000000
2002-01-01	6.320000000
2002-02-01	6.570000000
2002-03-01	6.720000000
2002-04-01	6.770000000
2002-05-01	6.900000000
2002-06-01	7.120000000
2002-07-01	7.250000000
2002-08-01	7.260000000
2002-09-01	7.150000000
2002-10-01	7.120000000
2002-11-01	7.090000000
2002-12-01	6.620000000
2003-01-01	5.990000000
2003-02-01	5.690000000
2003-03-01	5.490000000
2003-04-01	5.260000000
2003-05-01	4.920000000
2003-06-01	4.040000000
2003-07-01	3.450000000
2003-08-01	3.140000000
2003-09-01	2.810000000
2003-10-01	2.860000000
2003-11-01	2.890000000
2003-12-01	2.640000000
2004-01-01	2.260000000
2004-02-01	2.010000000
2004-03-01	1.840000000
2004-04-01	1.970000000
2004-05-01	1.990000000
2004-06-01	2.030000000
2004-07-01	2.020000000
2004-08-01	2.020000000
2004-09-01	1.960000000
2004-10-01	2.000000000
2004-11-01	1.990000000
2004-12-01	1.990000000
2005-01-01	1.960000000
2005-02-01	1.920000000
2005-03-01	2.020000000
2005-04-01	2.050000000
2005-05-01	2.080000000
2005-06-01	2.150000000
2005-07-01	2.220000000
2005-08-01	2.250000000
2005-09-01	2.350000000
2005-10-01	2.450000000
2005-11-01	2.540000000
2005-12-01	2.550000000
2006-01-01	2.520000000
2006-02-01	2.570000000
2006-03-01	2.720000000
2006-04-01	2.820000000
2006-05-01	2.940000000
2006-06-01	3.030000000
2006-07-01	3.090000000
2006-08-01	3.230000000
2006-09-01	3.370000000
2006-10-01	3.480000000
2006-11-01	3.620000000
2006-12-01	3.800000000
2007-01-01	3.980000000
2007-02-01	4.200000000
2007-03-01	4.430000000
2007-04-01	4.540000000
2007-05-01	4.600000000
2007-06-01	4.750000000
2007-07-01	4.890000000
2007-08-01	5.180000000
2007-09-01	5.510000000
2007-10-01	5.670000000
2007-11-01	5.780000000
2007-12-01	5.960000000
2008-01-01	5.790000000
2008-02-01	5.910000000
2008-03-01	6.180000000
2008-04-01	6.300000000
2008-05-01	6.480000000
2008-06-01	6.410000000
2008-07-01	6.460000000
2008-08-01	6.530000000
2008-09-01	6.820000000
2008-10-01	6.920000000
2008-11-01	6.180000000
2008-12-01	4.640000000
2009-01-01	3.700000000
2009-02-01	3.480000000
2009-03-01	3.170000000
2009-04-01	2.870000000
2009-05-01	2.400000000
2009-06-01	2.100000000
2009-07-01	1.870000000
2009-08-01	1.880000000
2009-09-01	1.930000000
2009-10-01	2.030000000
2009-11-01	2.050000000
2009-12-01	2.080000000
2010-01-01	2.250000000
2010-02-01	2.270000000
2010-03-01	2.300000000
2010-04-01	2.390000000
2010-05-01	2.500000000
2010-06-01	2.670000000
2010-07-01	2.690000000
2010-08-01	2.650000000
2010-09-01	2.640000000
2010-10-01	2.560000000
2010-11-01	2.510000000
2010-12-01	2.590000000
2011-01-01	2.590000000
2011-02-01	2.610000000
2011-03-01	2.620000000
2011-04-01	2.690000000
2011-05-01	2.720000000
2011-06-01	2.850000000
2011-07-01	2.940000000
2011-08-01	3.100000000
2011-09-01	3.080000000
2011-10-01	3.080000000
2011-11-01	3.160000000
2011-12-01	3.020000000
2012-01-01	2.700000000
2012-02-01	2.670000000
2012-03-01	2.430000000
2012-04-01	2.320000000
2012-05-01	2.320000000
2012-06-01	2.340000000
2012-07-01	2.240000000
2012-08-01	2.130000000
2012-09-01	1.960000000
2012-10-01	1.920000000
2012-11-01	1.920000000
2012-12-01	1.870000000
2013-01-01	1.860000000
2013-02-01	1.900500000
2013-03-01	1.848947368
2013-04-01	1.821428571
2013-05-01	1.763684211
2013-06-01	1.733500000
2013-07-01	1.688260870
2013-08-01	1.723181818
2013-09-01	1.713809524
2013-10-01	1.685217391
2013-11-01	1.663333333
2013-12-01	1.658947368
2014-01-01	1.649090909
2014-02-01	1.699000000
2014-03-01	1.707619048
2014-04-01	1.752105263
2014-05-01	1.819000000
2014-06-01	1.804000000
2014-07-01	1.715217391
2014-08-01	1.722380952
2014-09-01	1.700909091
2014-10-01	1.625652174
2014-11-01	1.659000000
2014-12-01	1.534500000
2015-01-01	1.388095238
2015-02-01	1.380000000
2015-03-01	1.380000000
2015-04-01	1.470000000
2015-05-01	1.490000000
2015-06-01	1.350000000
2015-07-01	1.270000000
2015-08-01	1.200000000
2015-09-01	1.160000000
2015-10-01	1.110000000
2015-11-01	1.150000000
2015-12-01	1.140000000
2016-01-01	1.160000000
2016-02-01	1.090000000
2016-03-01	1.020000000
2016-04-01	0.980000000
2016-05-01	0.980000000
2016-06-01	1.020000000
2016-07-01	1.010000000
2016-08-01	1.080000000
2016-09-01	1.090000000
2016-10-01	1.110000000
2016-11-01	1.100000000
2016-12-01	1.160000000
2017-01-01	1.080000000
2017-02-01	1.020000000
2017-03-01	0.960000000
2017-04-01	0.980000000
2017-05-01	0.900000000
2017-06-01	0.870000000
2017-07-01	0.840000000
2017-08-01	0.800000000
2017-09-01	0.800000000
2017-10-01	0.820000000
2017-11-01	0.780000000
2017-12-01	0.830000000
2018-01-01	0.840000000
2018-02-01	0.930000000
2018-03-01	1.070000000
2018-04-01	1.140000000
2018-05-01	1.070000000
2018-06-01	1.010000000
2018-07-01	1.040000000
2018-08-01	1.040000000
2018-09-01	1.090000000
2018-10-01	1.090000000