Month	Percent
1981-01-31	18.1131
1981-02-28	17.1803
1981-03-31	15.3352
1981-04-30	15.9938
1981-05-31	19.1941
1981-06-30	17.9148
1981-07-31	18.5597
1981-08-31	18.8219
1981-09-30	17.804
1981-10-31	16.3665
1981-11-30	13.3006
1981-12-31	13.3304
1982-01-31	14.35
1982-02-28	15.8219
1982-03-31	14.9429
1982-04-30	15.1875
1982-05-31	14.5658
1982-06-30	15.3835
1982-07-31	14.3352
1982-08-31	11.6161
1982-09-30	11.7046
1982-10-31	10.4003
1982-11-30	9.7756
1982-12-31	9.494
1983-01-31	8.9969
1983-02-28	9.1813
1983-03-31	9.3043
1983-04-30	9.2072
1983-05-31	9.0156
1983-06-30	9.7699
1983-07-31	10.0417
1983-08-31	10.3182
1983-09-30	9.8722
1983-10-31	9.6012
1983-11-30	9.8267
1983-12-31	10.1406
1984-01-31	9.8304
1984-02-29	9.9643
1984-03-31	10.4603
1984-04-30	10.8949
1984-05-31	11.5909
1984-06-30	11.7382
1984-07-31	12.0457
1984-08-31	11.858
1984-09-30	11.7
1984-10-31	10.8017
1984-11-30	9.5526
1984-12-31	8.9836
1985-01-31	8.429
1985-02-28	9.1064
1985-03-31	9.372
1985-04-30	8.7469
1985-05-31	8.1577
1985-06-30	7.6531
1985-07-31	7.9457
1985-08-31	8.0833
1985-09-30	8.1964
1985-10-31	8.1305
1985-11-30	8.0715
1985-12-31	8.0407
1986-01-31	8.0626
1986-02-28	7.9563
1986-03-31	7.4935
1986-04-30	6.8608
1986-05-31	6.9219
1986-06-30	6.9881
1986-07-31	6.6034
1986-08-31	6.1345
1986-09-30	5.9206
1986-10-31	5.935
1986-11-30	6.0188
1986-12-31	6.2918
1987-01-31	6.134
1987-02-28	6.3783
1987-03-31	6.432
1987-04-30	6.7845
1987-05-31	7.3389
1987-06-30	7.1649
1987-07-31	6.9295
1987-08-31	6.9813
1987-09-30	7.5713
1987-10-31	8.3155
1987-11-30	7.4645
1987-12-31	7.9006
1988-01-31	7.1502
1988-02-29	6.777
1988-03-31	6.7937
1988-04-30	7.1253
1988-05-31	7.4466
1988-06-30	7.6623
1988-07-31	8.1282
1988-08-31	8.5315
1988-09-30	8.361
1988-10-31	8.5538
1988-11-30	8.9746
1988-12-31	9.3534
1989-01-31	9.3767
1989-02-28	9.7284
1989-03-31	10.2755
1989-04-30	10.1221
1989-05-31	9.7248
1989-06-30	9.3523
1989-07-31	8.936
1989-08-31	8.7983
1989-09-30	8.939
1989-10-31	8.75
1989-11-30	8.517
1989-12-31	8.4786
1990-01-31	8.3153
1990-02-28	8.3344
1990-03-31	8.4574
1990-04-30	8.5345
1990-05-31	8.439
1990-06-30	8.314
1990-07-31	8.179
1990-08-31	8.0682
1990-09-30	8.1594
1990-10-31	8.1399
1990-11-30	8.125
1990-12-31	7.8964
1991-01-31	7.2983
1991-02-28	6.6563
1991-03-31	6.5477
1991-04-30	6.186
1991-05-31	6.0295
1991-06-30	6.1875
1991-07-31	6.1073
1991-08-31	5.7455
1991-09-30	5.5759
1991-10-31	5.4389
1991-11-30	5.0342
1991-12-31	4.5625
1992-01-31	4.1251
1992-02-29	4.1138
1992-03-31	4.3209
1992-04-30	4.1295
1992-05-31	3.8952
1992-06-30	3.9215
1992-07-31	3.443
1992-08-31	3.387
1992-09-30	3.2223
1992-10-31	3.364
1992-11-30	3.734
1992-12-31	3.5751
1993-01-31	3.288
1993-02-28	3.1821
1993-03-31	3.1811
1993-04-30	3.1635
1993-05-31	3.1814
1993-06-30	3.2749
1993-07-31	3.2295
1993-08-31	3.2136
1993-09-30	3.1523
1993-10-31	3.3242
1993-11-30	3.4221
1993-12-31	3.3251
1994-01-31	3.2104
1994-02-28	3.4851
1994-03-31	3.8205
1994-04-30	4.0687
1994-05-31	4.5923
1994-06-30	4.5745
1994-07-31	4.7953
1994-08-31	4.8569
1994-09-30	5.053
1994-10-31	5.5571
1994-11-30	5.8118
1994-12-31	6.3129
1995-01-31	6.2865
1995-02-28	6.2197
1995-03-31	6.2086
1995-04-30	6.178
1995-05-31	6.0595
1995-06-30	5.9444
1995-07-31	5.8431
1995-08-31	5.8324
1995-09-30	5.7661
1995-10-31	5.8382
1995-11-30	5.7725
1995-12-31	5.6668
1996-01-31	5.4473
1996-02-29	5.1902
1996-03-31	5.3657
1996-04-30	5.4238
1996-05-31	5.406
1996-06-30	5.479
1996-07-31	5.5541
1996-08-31	5.4362
1996-09-30	5.5417
1996-10-31	5.4561
1996-11-30	5.4462
1996-12-31	5.5245
1997-01-31	5.5155
1997-02-28	5.4345
1997-03-31	5.5597
1997-04-30	5.7443
1997-05-31	5.7323
1997-06-30	5.7079
1997-07-31	5.657
1997-08-31	5.6368
1997-09-30	5.6357
1997-10-31	5.69
1997-11-30	5.7805
1997-12-31	5.8252
1998-01-31	5.5926
1998-02-28	5.6353
1998-03-31	5.597
1998-04-30	5.612
1998-05-31	5.6192
1998-06-30	5.6252
1998-07-31	5.6065
1998-08-31	5.597
1998-09-30	5.4307
1998-10-31	5.2175
1998-11-30	5.2667
1998-12-31	5.1826
1999-01-31	4.932
1999-02-28	4.9273
1999-03-31	4.9389
1999-04-30	4.91
1999-05-31	4.9439
1999-06-30	5.1339
1999-07-31	5.2639
1999-08-31	5.4171
1999-09-30	5.5216
1999-10-31	6.1524
1999-11-30	6.0525
1999-12-31	6.1105
2000-01-31	5.985
2000-02-29	6.0383
2000-03-31	6.1578
2000-04-30	6.2872
2000-05-31	6.7148
2000-06-30	6.7557
2000-07-31	6.6898
2000-08-31	6.6484
2000-09-30	6.6336
2000-10-31	6.7048
2000-11-30	6.6855
2000-12-31	6.4821
2001-01-31	5.6568
2001-02-28	5.2955
2001-03-31	4.9209
2001-04-30	4.5676
2001-05-31	4.0443
2001-06-30	3.7671
2001-07-31	3.705
2001-08-31	3.5241
2001-09-30	2.9605
2001-10-31	2.3502
2001-11-30	2.0527
2001-12-31	1.8674
2002-01-31	1.7777
2002-02-28	1.8555
2002-03-31	1.9495
2002-04-30	1.9219
2002-05-31	1.8595
2002-06-30	1.8381
2002-07-31	1.8087
2002-08-31	1.7383
2002-09-30	1.7681
2002-10-31	1.7504
2002-11-30	1.4331
2002-12-31	1.3763
2003-01-31	1.3123
2003-02-28	1.2938
2003-03-31	1.2374
2003-04-30	1.2633
2003-05-31	1.246
2003-06-30	1.064
2003-07-31	1.0748
2003-08-31	1.0945
2003-09-30	1.1025
2003-10-31	1.1222
2003-11-30	1.126
2003-12-31	1.126
2004-01-31	1.08
2004-02-29	1.0705
2004-03-31	1.0624
2004-04-30	1.0983
2004-05-31	1.2082
2004-06-30	1.4595
2004-07-31	1.585
2004-08-31	1.6967
2004-09-30	1.8889
2004-10-31	2.0529
2004-11-30	2.277
2004-12-31	2.4714
2005-01-31	2.637
2005-02-28	2.7963
2005-03-31	2.9863
2005-04-30	3.1117
2005-05-31	3.2358
2005-06-30	3.3993
2005-07-31	3.5833
2005-08-31	3.7784
2005-09-30	3.8818
2005-10-31	4.1445
2005-11-30	4.3273
2005-12-31	4.469
2006-01-31	4.5931
2006-02-28	4.74
2006-03-31	4.898
2006-04-30	5.0433
2006-05-31	5.1605
2006-06-30	5.3591
2006-07-31	5.4667
2006-08-31	5.3809
2006-09-30	5.346
2006-10-31	5.3341
2006-11-30	5.3357
2006-12-31	5.3203
2007-01-31	5.3161
2007-02-28	5.3305
2007-03-31	5.31
2007-04-30	5.3137
2007-05-31	5.3129
2007-06-30	5.326
2007-07-31	5.3366
2007-08-31	5.4732
2007-09-30	5.535
2007-10-31	5.1291
2007-11-30	4.9702
2007-12-31	5.0092
2008-01-31	3.8707
2008-02-29	3.0662
2008-03-31	2.8037
2008-04-30	2.9975
2008-05-31	2.8583
2008-06-30	2.9398
2008-07-31	2.9861
2008-08-31	2.9793
2008-09-30	3.6068
2008-10-31	4.6993
2008-11-30	3.2978
2008-12-31	2.3202
2009-01-31	1.4233
2009-02-28	1.579
2009-03-31	1.5705
2009-04-30	1.3225
2009-05-31	1.0082
2009-06-30	0.9255
2009-07-31	0.7633
2009-08-31	0.7645
2009-09-30	0.5827
2009-10-31	0.5123
2009-11-30	0.4419
2009-12-31	0.3683
2010-01-31	0.3848
2010-02-28	0.4025
2010-03-31	0.4439
2010-04-30	0.4958
2010-05-31	0.685
2010-06-30	0.81
2010-07-31	0.805
2010-08-31	0.5438
2010-09-30	0.4448
2010-10-31	0.4519
2010-11-30	0.4745
2010-12-31	0.3998
2011-01-31	0.4603
2011-02-28	0.4228
2011-03-31	0.4137
2011-04-30	0.4442
2011-05-31	0.3275
2011-06-30	0.3623
2011-07-31	0.4093
2011-08-31	0.3691
2011-09-30	0.4011
2011-10-31	0.429
2011-11-30	0.4505
2011-12-31	0.549
2012-01-31	0.469
2012-02-29	0.409
2012-03-31	0.4039
2012-04-30	0.4466
2012-05-31	0.4707
2012-06-30	0.4571
2012-07-31	0.4775
2012-08-31	0.4384
2012-09-30	0.4108
2012-10-31	0.34
2012-11-30	0.3516
2012-12-31	0.3639
2013-01-31	0.3955
2013-02-28	0.425
2013-03-31	0.4073
2013-04-30	0.4107
2013-05-31	0.3807
2013-06-30	0.337
2013-07-31	0.3178
2013-08-31	0.3081
2013-09-30	0.2881
2013-10-31	0.2622
2013-11-30	0.2314
2013-12-31	0.2453
2014-01-31	0.2332
2014-02-28	0.2498
2014-03-31	0.2388
2014-04-30	0.2288
2014-05-31	0.2523
2014-06-30	0.2881
2014-07-31	0.2793
2014-08-31	0.331
2014-09-30	0.3207
2014-10-31	0.2667
2014-11-30	0.292
2014-12-31	0.3721
2015-01-31	0.3988
2015-02-28	0.3703
2015-03-31	0.3857
2015-04-30	0.3978
2015-05-31	0.2913
2015-06-30	0.3625
2015-07-31	0.4037
2015-08-31	0.4553
2015-09-30	0.4891
2015-10-31	0.5375
2015-11-30	0.7429
2015-12-31	0.7481
2016-01-31	0.762
2016-02-29	0.7652
2016-03-31	0.7674
2016-04-30	0.7998
2016-05-31	0.798
2016-06-30	0.8439
2016-07-31	0.9988
2016-08-31	0.8455
2016-09-30	0.8902
2016-10-31	0.9093
2016-11-30	0.9245
2016-12-31	0.96
2017-01-31	1.0226
2017-02-28	1.036
2017-03-31	1.1296
2017-04-30	1.1661
2017-05-31	1.1676
2017-06-30	1.2341
2017-07-31	1.2962
2017-08-31	1.3545
2017-09-30	1.3624
2017-10-31	1.4007
2017-11-30	1.4905
2017-12-31	1.655
2018-01-31	1.8343
2018-02-28	1.941
2018-03-31	2.2395
2018-04-30	2.4025
2018-05-31	2.3776
2018-06-30	2.3857
2018-07-31	2.3923
2018-08-31	2.3891
2018-09-30	2.4045
2018-10-31	2.5063
2018-11-30	2.6864
2018-12-31	2.835
2019-01-31	2.8068
2019-02-28	2.6865
2019-03-31	2.6195
2019-04-30	2.6
2019-05-31	2.5443
2019-06-30	2.3985
2019-07-31	2.3017
2019-08-31	2.1688
2019-09-30	2.1326
2019-10-31	1.9767
2019-11-30	1.9071
2019-12-31	1.9019
2020-01-31	1.8105
2020-02-29	1.6568