Month	Percent
1997-01-01	4.360000
1997-02-01	4.190000
1997-03-01	4.200000
1997-04-01	4.260000
1997-05-01	4.180000
1997-06-01	4.030000
1997-07-01	3.890000
1997-08-01	3.780000
1997-09-01	3.850000
1997-10-01	3.870000
1997-11-01	4.010000
1997-12-01	4.160000
1998-01-01	4.550000
1998-02-01	4.810000
1998-03-01	4.950000
1998-04-01	4.870000
1998-05-01	5.010000
1998-06-01	5.240000
1998-07-01	5.250000
1998-08-01	4.690000
1998-09-01	4.700000
1998-10-01	4.800000
1998-11-01	5.040000
1998-12-01	5.190000
1999-01-01	5.290000
1999-02-01	5.290000
1999-03-01	5.050000
1999-04-01	5.080000
1999-05-01	5.050000
1999-06-01	5.150000
1999-07-01	5.210000
1999-08-01	5.190000
1999-09-01	5.250000
1999-10-01	5.330000
1999-11-01	5.310000
1999-12-01	5.190000
2000-01-01	5.330000
2000-02-01	5.330000
2000-03-01	5.200000
2000-04-01	5.160000
2000-05-01	5.190000
2000-06-01	5.340000
2000-07-01	5.510000
2000-08-01	5.710000
2000-09-01	5.810000
2000-10-01	5.640000
2000-11-01	5.670000
2000-12-01	5.820000
2001-01-01	5.640000
2001-02-01	5.350000
2001-03-01	5.200000
2001-04-01	5.080000
2001-05-01	6.488750
2001-06-01	6.390000
2001-07-01	6.627727
2001-08-01	7.293182
2001-09-01	8.064375
2001-10-01	7.454118
2001-11-01	6.881429
2001-12-01	6.648182
2002-01-01	6.546522
2002-02-01	6.699474
2002-03-01	6.991579
2002-04-01	8.099444
2002-05-01	9.066190
2002-06-01	10.356667
2002-07-01	9.334545
2002-08-01	9.316190
2002-09-01	10.447895
2002-10-01	11.673043
2002-11-01	11.475500
2002-12-01	10.790000
2003-01-01	11.436190
2003-02-01	11.688000
2003-03-01	10.677619
2003-04-01	9.451765
2003-05-01	8.492353
2003-06-01	7.916190
2003-07-01	7.995217
2003-08-01	8.579000
2003-09-01	8.277143
2003-10-01	7.641500
2003-11-01	7.331429
2003-12-01	7.125000
2004-01-01	7.000000
2004-02-01	7.370000
2004-03-01	7.370000
2004-04-01	7.640000
2004-05-01	7.870000
2004-06-01	7.810000
2004-07-01	7.770000
2004-08-01	7.940000
2004-09-01	7.720000
2004-10-01	7.590000
2004-11-01	7.420000
2004-12-01	7.240000
2005-01-01	6.930000
2005-02-01	6.660000
2005-03-01	6.590000
2005-04-01	6.600000
2005-05-01	6.250000
2005-06-01	6.230000
2005-07-01	6.260000
2005-08-01	6.140000
2005-09-01	6.010000
2005-10-01	6.090000
2005-11-01	6.340000
2005-12-01	6.240000
2006-01-01	6.170000
2006-02-01	6.420000
2006-03-01	6.530000
2006-04-01	6.580000
2006-05-01	6.490000
2006-06-01	6.500000
2006-07-01	6.520000
2006-08-01	6.460000
2006-09-01	6.450000
2006-10-01	6.100000
2006-11-01	5.880000
2006-12-01	5.670000
2007-01-01	5.580000
2007-02-01	5.360000
2007-03-01	5.330000
2007-04-01	5.070000
2007-05-01	4.880000
2007-06-01	5.370000
2007-07-01	5.710000
2007-08-01	6.120000
2007-09-01	5.970000
2007-10-01	5.670000
2007-11-01	5.580000
2007-12-01	6.010000
2008-01-01	6.010000
2008-02-01	5.750000
2008-03-01	5.690000
2008-04-01	5.790000
2008-05-01	5.930000
2008-06-01	6.050000
2008-07-01	6.160000
2008-08-01	5.950000
2008-09-01	5.970000
2008-10-01	6.140000
2008-11-01	6.370000
2008-12-01	5.270000
2009-01-01	5.060000
2009-02-01	4.730000
2009-03-01	4.710000
2009-04-01	4.740000
2009-05-01	5.270000
2009-06-01	5.530000
2009-07-01	5.300000
2009-08-01	5.300000
2009-09-01	5.080000
2009-10-01	4.960000
2009-11-01	4.950000
2009-12-01	5.130000
2010-01-01	5.120000
2010-02-01	4.970000
2010-03-01	4.910000
2010-04-01	4.970000
2010-05-01	4.870000
2010-06-01	4.690000
2010-07-01	4.580000
2010-08-01	4.250000
2010-09-01	4.390000
2010-10-01	4.320000
2010-11-01	4.460000
2010-12-01	4.680000
2011-01-01	4.770000
2011-02-01	5.040000
2011-03-01	5.230000
2011-04-01	5.360000
2011-05-01	5.330000
2011-06-01	5.300000
2011-07-01	5.210000
2011-08-01	4.870000
2011-09-01	4.730000
2011-10-01	4.640000
2011-11-01	4.650000
2011-12-01	4.630000
2012-01-01	4.510000
2012-02-01	4.580000
2012-03-01	4.730000
2012-04-01	4.660000
2012-05-01	4.530000
2012-06-01	4.380000
2012-07-01	4.130000
2012-08-01	4.290000
2012-09-01	4.500000
2012-10-01	4.350000
2012-11-01	4.160000
2012-12-01	3.970000
2013-01-01	4.020000
2013-02-01	4.050000
2013-03-01	3.980000
2013-04-01	3.730000
2013-05-01	3.560000
2013-06-01	3.800000
2013-07-01	3.750000
2013-08-01	3.870000
2013-09-01	3.940000
2013-10-01	3.670000
2013-11-01	3.600000
2013-12-01	3.580000
2014-01-01	3.670000
2014-02-01	3.630000
2014-03-01	3.400000
2014-04-01	3.390000
2014-05-01	3.080000
2014-06-01	2.890000
2014-07-01	2.820000
2014-08-01	2.630000
2014-09-01	2.450000
2014-10-01	2.170000
2014-11-01	2.150000
2014-12-01	2.350000
2015-01-01	1.960000
2015-02-01	1.770000
2015-03-01	1.610000
2015-04-01	1.450000
2015-05-01	2.020000
2015-06-01	2.440000
2015-07-01	2.470000
2015-08-01	2.280000
2015-09-01	2.320000
2015-10-01	2.130000
2015-11-01	2.190000
2015-12-01	2.200000
2016-01-01	2.040000
2016-02-01	1.860000
2016-03-01	1.920000
2016-04-01	1.840000
2016-05-01	1.820000
2016-06-01	1.760000
2016-07-01	1.690000
2016-08-01	1.740000
2016-09-01	1.770000
2016-10-01	1.840000
2016-11-01	2.070000
2016-12-01	2.200000
2017-01-01	2.150000
2017-02-01	2.160000
2017-03-01	2.110000
2017-04-01	2.050000
2017-05-01	2.160000
2017-06-01	2.030000
2017-07-01	1.970000
2017-08-01	1.750000
2017-09-01	1.720000
2017-10-01	1.620000
2017-11-01	1.600000
2017-12-01	1.590000
2018-01-01	1.550000
2018-02-01	1.760000
2018-03-01	1.640000
2018-04-01	1.670000
2018-05-01	1.880000
2018-06-01	1.930000
2018-07-01	2.160000
2018-08-01	2.150000
2018-09-01	2.210000
2018-10-01	2.290000