Month	Percent
1980-01-01	15.500000000
1980-02-01	15.400000000
1980-03-01	15.720000000
1980-04-01	15.980000000
1980-05-01	15.900000000
1980-06-01	15.060000000
1980-07-01	15.780000000
1980-08-01	16.210000000
1980-09-01	16.330000000
1980-10-01	16.710000000
1980-11-01	16.710000000
1980-12-01	16.230000000
1981-01-01	16.030000000
1981-02-01	16.340000000
1981-03-01	16.280000000
1981-04-01	15.850000000
1981-05-01	15.990000000
1981-06-01	15.520000000
1981-07-01	14.990000000
1981-08-01	15.090000000
1981-09-01	15.730000000
1981-10-01	15.960000000
1981-11-01	16.200000000
1981-12-01	15.760000000
1982-01-01	15.520000000
1982-02-01	15.960000000
1982-03-01	15.920000000
1982-04-01	16.180000000
1982-05-01	15.740000000
1982-06-01	16.080000000
1982-07-01	16.060000000
1982-08-01	16.070000000
1982-09-01	16.060000000
1982-10-01	16.480000000
1982-11-01	16.230000000
1982-12-01	15.550000000
1983-01-01	15.810000000
1983-02-01	15.400000000
1983-03-01	15.820000000
1983-04-01	16.400000000
1983-05-01	17.020000000
1983-06-01	16.700000000
1983-07-01	16.940000000
1983-08-01	17.630000000
1983-09-01	17.750000000
1983-10-01	18.110000000
1983-11-01	18.100000000
1983-12-01	17.230000000
1984-01-01	17.190000000
1984-02-01	16.880000000
1984-03-01	17.270000000
1984-04-01	17.550000000
1984-05-01	17.570000000
1984-06-01	17.110000000
1984-07-01	16.950000000
1984-08-01	16.880000000
1984-09-01	16.420000000
1984-10-01	15.550000000
1984-11-01	14.980000000
1984-12-01	13.920000000
1985-01-01	13.200000000
1985-02-01	13.220000000
1985-03-01	13.460000000
1985-04-01	13.400000000
1985-05-01	13.570000000
1985-06-01	13.790000000
1985-07-01	14.440000000
1985-08-01	14.390000000
1985-09-01	13.920000000
1985-10-01	12.600000000
1985-11-01	12.100000000
1985-12-01	12.320000000
1986-01-01	12.340000000
1986-02-01	12.360000000
1986-03-01	12.240000000
1986-04-01	12.060000000
1986-05-01	11.350000000
1986-06-01	10.970000000
1986-07-01	11.520000000
1986-08-01	11.510000000
1986-09-01	11.100000000
1986-10-01	10.150000000
1986-11-01	10.290000000
1986-12-01	10.360000000
1987-01-01	10.740000000
1987-02-01	10.590000000
1987-03-01	10.950000000
1987-04-01	12.040000000
1987-05-01	13.430000000
1987-06-01	13.200000000
1987-07-01	13.560000000
1987-08-01	14.010000000
1987-09-01	14.180000000
1987-10-01	14.260000000
1987-11-01	13.360000000
1987-12-01	13.440000000
1988-01-01	12.640000000
1988-02-01	12.360000000
1988-03-01	11.610000000
1988-04-01	11.070000000
1988-05-01	11.300000000
1988-06-01	10.860000000
1988-07-01	11.060000000
1988-08-01	11.140000000
1988-09-01	11.420000000
1988-10-01	12.140000000
1988-11-01	12.510000000
1988-12-01	12.820000000
1989-01-01	13.210000000
1989-02-01	13.200000000
1989-03-01	13.570000000
1989-04-01	13.510000000
1989-05-01	13.620000000
1989-06-01	13.780000000
1989-07-01	12.577000000
1989-08-01	13.700000000
1989-09-01	13.740000000
1989-10-01	13.810000000
1989-11-01	14.000000000
1989-12-01	14.490000000
1990-01-01	14.490000000
1990-02-01	14.620000000
1990-03-01	14.860000000
1990-04-01	14.790000000
1990-05-01	14.630000000
1990-06-01	14.490000000
1990-07-01	14.450000000
1990-08-01	14.670000000
1990-09-01	15.140000000
1990-10-01	14.860000000
1990-11-01	14.590000000
1990-12-01	14.540000000
1991-01-01	14.520000000
1991-02-01	14.130000000
1991-03-01	13.150000000
1991-04-01	12.530000000
1991-05-01	11.860000000
1991-06-01	11.920000000
1991-07-01	12.150000000
1991-08-01	12.090000000
1991-09-01	11.580000000
1991-10-01	11.620000000
1991-11-01	11.457200000
1991-12-01	11.319411760
1992-01-01	10.926555560
1992-02-01	10.792210530
1992-03-01	10.796190480
1992-04-01	10.871300000
1992-05-01	10.846736840
1992-06-01	11.340772730
1992-07-01	11.827434780
1992-08-01	12.222809520
1992-09-01	12.645545450
1992-10-01	12.999476190
1992-11-01	12.540450000
1992-12-01	12.532800000
1993-01-01	12.154578950
1993-02-01	11.431450000
1993-03-01	11.349909090
1993-04-01	11.485600000
1993-05-01	11.217619050
1993-06-01	10.567409090
1993-07-01	10.219000000
1993-08-01	9.481380952
1993-09-01	9.093272727
1993-10-01	8.687600000
1993-11-01	8.561050000
1993-12-01	8.280666667
1994-01-01	7.985650000
1994-02-01	8.081000000
1994-03-01	8.827409091
1994-04-01	9.059300000
1994-05-01	9.548238095
1994-06-01	10.283409090
1994-07-01	10.588350000
1994-08-01	10.678000000
1994-09-01	11.221571430
1994-10-01	11.135250000
1994-11-01	11.184947370
1994-12-01	11.380368420
1995-01-01	11.862238100
1995-02-01	11.595950000
1995-03-01	12.260909090
1995-04-01	12.091611110
1995-05-01	11.411400000
1995-06-01	11.537590910
1995-07-01	11.334000000
1995-08-01	10.971045450
1995-09-01	10.802571430
1995-10-01	10.893333330
1995-11-01	10.540850000
1995-12-01	9.949722222
1996-01-01	9.464318182
1996-02-01	9.704619048
1996-03-01	9.893300000
1996-04-01	9.323000000
1996-05-01	9.170650000
1996-06-01	9.108750000
1996-07-01	8.775869565
1996-08-01	8.861714286
1996-09-01	8.435714286
1996-10-01	7.760130435
1996-11-01	7.342100000
1996-12-01	6.997368421
1997-01-01	6.831333333
1997-02-01	6.740850000
1997-03-01	7.031736842
1997-04-01	6.952909091
1997-05-01	6.614421053
1997-06-01	6.467380952
1997-07-01	6.212136364
1997-08-01	6.304900000
1997-09-01	6.086761905
1997-10-01	5.975217391
1997-11-01	5.957150000
1997-12-01	5.643619048
1998-01-01	5.397050000
1998-02-01	5.235300000
1998-03-01	5.085857143
1998-04-01	5.063450000
1998-05-01	5.130105263
1998-06-01	5.019227273
1998-07-01	4.939434783
1998-08-01	4.740952381
1998-09-01	4.474454545
1998-10-01	4.427952381
1998-11-01	4.405684211
1998-12-01	4.075650000
1999-01-01	3.880105263
1999-02-01	4.022250000
1999-03-01	4.254391304
1999-04-01	4.086350000
1999-05-01	4.274238095
1999-06-01	4.600090909
1999-07-01	4.911272727
1999-08-01	5.173409091
1999-09-01	5.314863636
1999-10-01	5.564000000
1999-11-01	5.279909091
1999-12-01	5.366857143
2000-01-01	5.757476190
2000-02-01	5.731476190
2000-03-01	5.550130435
2000-04-01	5.452111111
2000-05-01	5.626590909
2000-06-01	5.454954545
2000-07-01	5.534142857
2000-08-01	5.500590909
2000-09-01	5.559142857
2000-10-01	5.494666667
2000-11-01	5.445636364
2000-12-01	5.203473684
2001-01-01	5.076909091
2001-02-01	5.116750000
2001-03-01	5.040909091
2001-04-01	5.179526316
2001-05-01	5.363181818
2001-06-01	5.326571429
2001-07-01	5.347863636
2001-08-01	5.155782609
2001-09-01	5.138450000
2001-10-01	4.908956522
2001-11-01	4.760727273
2001-12-01	4.967777778
2002-01-01	5.045318182
2002-02-01	5.106450000
2002-03-01	5.336300000
2002-04-01	5.335666667
2002-05-01	5.361409091
2002-06-01	5.231100000
2002-07-01	5.068956522
2002-08-01	4.777727273
2002-09-01	4.575952381
2002-10-01	4.625000000
2002-11-01	4.602285714
2002-12-01	4.425526316
2003-01-01	4.239409091
2003-02-01	4.010750000
2003-03-01	4.035238095
2003-04-01	4.188400000
2003-05-01	3.876666667
2003-06-01	3.688142857
2003-07-01	4.031217391
2003-08-01	4.191380952
2003-09-01	4.209000000
2003-10-01	4.268652174
2003-11-01	4.398350000
2003-12-01	4.339315789
2004-01-01	4.191571429
2004-02-01	4.148150000
2004-03-01	4.011695652
2004-04-01	4.199050000
2004-05-01	4.334380952
2004-06-01	4.390181818
2004-07-01	4.281500000
2004-08-01	4.151090909
2004-09-01	4.082454545
2004-10-01	3.965428571
2004-11-01	3.850863636
2004-12-01	3.643347826
2005-01-01	3.590952381
2005-02-01	3.580650000
2005-03-01	3.733428571
2005-04-01	3.529285714
2005-05-01	3.359681818
2005-06-01	3.185409091
2005-07-01	3.219476190
2005-08-01	3.231260870
2005-09-01	3.088363636
2005-10-01	3.272523810
2005-11-01	3.476590909
2005-12-01	3.368571429
2006-01-01	3.330590909
2006-02-01	3.482900000
2006-03-01	3.648913043
2006-04-01	3.918888889
2006-05-01	3.986318182
2006-06-01	3.988181818
2006-07-01	4.023904762
2006-08-01	3.892565217
2006-09-01	3.763285714
2006-10-01	3.812909091
2006-11-01	3.747000000
2006-12-01	3.816263158
2007-01-01	4.072454545
2007-02-01	4.110800000
2007-03-01	4.008681818
2007-04-01	4.208736842
2007-05-01	4.336285714
2007-06-01	4.620285714
2007-07-01	4.596227273
2007-08-01	4.398130435
2007-09-01	4.354000000
2007-10-01	4.378347826
2007-11-01	4.247863636
2007-12-01	4.347705882
2008-01-01	4.182727273
2008-02-01	4.144095238
2008-03-01	4.117631579
2008-04-01	4.310272727
2008-05-01	4.422150000
2008-06-01	4.791619048
2008-07-01	4.797863636
2008-08-01	4.559117647
2008-09-01	4.568333333
2008-10-01	4.466000000
2008-11-01	4.146800000
2008-12-01	3.858176471
2009-01-01	4.145842105
2009-02-01	4.233550000
2009-03-01	4.058761905
2009-04-01	4.005750000
2009-05-01	4.054250000
2009-06-01	4.235045455
2009-07-01	4.011956522
2009-08-01	3.778380952
2009-09-01	3.803227273
2009-10-01	3.771090909
2009-11-01	3.789523810
2009-12-01	3.804200000
2010-01-01	3.988650000
2010-02-01	3.978100000
2010-03-01	3.830478261
2010-04-01	3.901421053
2010-05-01	4.084142857
2010-06-01	4.555500000
2010-07-01	4.433090909
2010-08-01	4.037181818
2010-09-01	4.094636364
2010-10-01	4.036523810
2010-11-01	4.685904762
2010-12-01	5.374380952
2011-01-01	5.379333333
2011-02-01	5.257800000
2011-03-01	5.249434783
2011-04-01	5.328736842
2011-05-01	5.322181818
2011-06-01	5.479863636
2011-07-01	5.824857143
2011-08-01	5.252347826
2011-09-01	5.200227273
2011-10-01	5.251333333
2011-11-01	6.192090909
2011-12-01	5.504523810
2012-01-01	5.399285714
2012-02-01	5.111095238
2012-03-01	5.169727273
2012-04-01	5.790000000
2012-05-01	6.125545455
2012-06-01	6.589380952
2012-07-01	6.795000000
2012-08-01	6.581285714
2012-09-01	5.920500000
2012-10-01	5.646590909
2012-11-01	5.690090909
2012-12-01	5.339944444
2013-01-01	5.050272727
2013-02-01	5.218300000
2013-03-01	4.921350000
2013-04-01	4.591095238
2013-05-01	4.246318182
2013-06-01	4.670700000
2013-07-01	4.660173913
2013-08-01	4.507181818
2013-09-01	4.416904762
2013-10-01	4.216347826
2013-11-01	4.106350000
2013-12-01	4.138550000
2014-01-01	3.785000000
2014-02-01	3.561250000
2014-03-01	3.312000000
2014-04-01	3.104150000
2014-05-01	2.933428571
2014-06-01	2.712476190
2014-07-01	2.671000000
2014-08-01	2.419400000
2014-09-01	2.196045455
2014-10-01	2.111304348
2014-11-01	2.070550000
2014-12-01	1.785368421
2015-01-01	1.542095238
2015-02-01	1.513100000
2015-03-01	1.225818182
2015-04-01	1.312750000
2015-05-01	1.770631579
2015-06-01	2.233954545
2015-07-01	2.100695652
2015-08-01	1.949761905
2015-09-01	2.030772727
2015-10-01	1.728181818
2015-11-01	1.727666667
2015-12-01	1.685619048
2016-01-01	1.727950000
2016-02-01	1.723523810
2016-03-01	1.550761905
2016-04-01	1.513523810
2016-05-01	1.566500000
2016-06-01	1.479954545
2016-07-01	1.169095238
2016-08-01	1.014304348
2016-09-01	1.040909091
2016-10-01	1.072619048
2016-11-01	1.423818182
2016-12-01	1.436666667
2017-01-01	1.466318182
2017-02-01	1.703000000
2017-03-01	1.717521739
2017-04-01	1.617777778
2017-05-01	1.568409091
2017-06-01	1.452318182
2017-07-01	1.597809524
2017-08-01	1.484863636
2017-09-01	1.541285714
2017-10-01	1.614681818
2017-11-01	1.488772727
2017-12-01	1.441631579
2018-01-01	1.473863636
2018-02-01	1.517800000
2018-03-01	1.349619048
2018-04-01	1.218300000
2018-05-01	1.385818182
2018-06-01	1.372904762
2018-07-01	1.317545455
2018-08-01	1.372391304
2018-09-01	1.441800000
2018-10-01	1.573565217