Month	Percent
1981-01-31	18.2381
1981-02-28	17.3013
1981-03-31	15.4602
1981-04-30	16.1188
1981-05-31	19.3191
1981-06-30	18.0398
1981-07-31	18.6847
1981-08-31	18.9469
1981-09-30	17.929
1981-10-31	16.4915
1981-11-30	13.4256
1981-12-31	13.4673
1982-01-31	14.475
1982-02-28	15.9719
1982-03-31	15.0652
1982-04-30	15.3094
1982-05-31	14.7105
1982-06-30	15.5085
1982-07-31	14.4744
1982-08-31	11.7411
1982-09-30	11.8295
1982-10-31	10.5298
1982-11-30	9.8977
1982-12-31	9.625
1983-01-31	9.1313
1983-02-28	9.3063
1983-03-31	9.4266
1983-04-30	9.3322
1983-05-31	9.1406
1983-06-30	9.8892
1983-07-31	10.1637
1983-08-31	10.4403
1983-09-30	9.9972
1983-10-31	9.7262
1983-11-30	9.9517
1983-12-31	10.2625
1984-01-31	9.9584
1984-02-29	10.0893
1984-03-31	10.5853
1984-04-30	11.0166
1984-05-31	11.7144
1984-06-30	11.8036
1984-07-31	12.1082
1984-08-31	11.9205
1984-09-30	11.7657
1984-10-31	10.8642
1984-11-30	9.6279
1984-12-31	9.0428
1985-01-31	8.4915
1985-02-28	9.1689
1985-03-31	9.4375
1985-04-30	8.8094
1985-05-31	8.2262
1985-06-30	7.7156
1985-07-31	8.0082
1985-08-31	8.1518
1985-09-30	8.259
1985-10-31	8.193
1985-11-30	8.134
1985-12-31	8.1032
1986-01-31	8.1279
1986-02-28	8.0188
1986-03-31	7.556
1986-04-30	6.9233
1986-05-31	6.9844
1986-06-30	7.0506
1986-07-31	6.6659
1986-08-31	6.2001
1986-09-30	5.9831
1986-10-31	5.9975
1986-11-30	6.0813
1986-12-31	6.3543
1987-01-31	6.1965
1987-02-28	6.4408
1987-03-31	6.4945
1987-04-30	6.847
1987-05-31	7.4014
1987-06-30	7.233
1987-07-31	6.9947
1987-08-31	7.0438
1987-09-30	7.6338
1987-10-31	8.3894
1987-11-30	7.527
1987-12-31	7.9616
1988-01-31	7.2127
1988-02-29	6.8395
1988-03-31	6.8562
1988-04-30	7.1878
1988-05-31	7.5091
1988-06-30	7.7248
1988-07-31	8.1907
1988-08-31	8.594
1988-09-30	8.4235
1988-10-31	8.6163
1988-11-30	9.0371
1988-12-31	9.4159
1989-01-31	9.408
1989-02-28	9.7597
1989-03-31	10.3069
1989-04-30	10.1533
1989-05-31	9.756
1989-06-30	9.3835
1989-07-31	8.9673
1989-08-31	8.8295
1989-09-30	8.9702
1989-10-31	8.7813
1989-11-30	8.5483
1989-12-31	8.5099
1990-01-31	8.3466
1990-02-28	8.3656
1990-03-31	8.4886
1990-04-30	8.5658
1990-05-31	8.4702
1990-06-30	8.3452
1990-07-31	8.2102
1990-08-31	8.0994
1990-09-30	8.1906
1990-10-31	8.1712
1990-11-30	8.1563
1990-12-31	7.9276
1991-01-31	7.3295
1991-02-28	6.6875
1991-03-31	6.5844
1991-04-30	6.2173
1991-05-31	6.0601
1991-06-30	6.2188
1991-07-31	6.1386
1991-08-31	5.7798
1991-09-30	5.6071
1991-10-31	5.4701
1991-11-30	5.0655
1991-12-31	4.5938
1992-01-31	4.1875
1992-02-29	4.175
1992-03-31	4.3835
1992-04-30	4.1875
1992-05-31	3.9572
1992-06-30	3.9716
1992-07-31	3.4973
1992-08-31	3.45
1992-09-30	3.2841
1992-10-31	3.429
1992-11-30	3.7946
1992-12-31	3.6369
1993-01-31	3.35
1993-02-28	3.2438
1993-03-31	3.2418
1993-04-30	3.225
1993-05-31	3.2434
1993-06-30	3.3352
1993-07-31	3.2926
1993-08-31	3.2738
1993-09-30	3.2131
1993-10-31	3.3869
1993-11-30	3.483
1993-12-31	3.3839
1994-01-31	3.2719
1994-02-28	3.5469
1994-03-31	3.8832
1994-04-30	4.1316
1994-05-31	4.6531
1994-06-30	4.6364
1994-07-31	4.8571
1994-08-31	4.9233
1994-09-30	5.1136
1994-10-31	5.619
1994-11-30	5.8778
1994-12-31	6.375
1995-01-31	6.3483
1995-02-28	6.2813
1995-03-31	6.269
1995-04-30	6.2396
1995-05-31	6.122
1995-06-30	6.0057
1995-07-31	5.9048
1995-08-31	5.8949
1995-09-30	5.8264
1995-10-31	5.9291
1995-11-30	5.8577
1995-12-31	5.7468
1996-01-31	5.5182
1996-02-29	5.2529
1996-03-31	5.4243
1996-04-30	5.493
1996-05-31	5.469
1996-06-30	5.5575
1996-07-31	5.6278
1996-08-31	5.5005
1996-09-30	5.6043
1996-10-31	5.5213
1996-11-30	5.51
1996-12-31	5.5855
1997-01-31	5.5809
1997-02-28	5.495
1997-03-31	5.6168
1997-04-30	5.8041
1997-05-31	5.8075
1997-06-30	5.7681
1997-07-31	5.7139
1997-08-31	5.6905
1997-09-30	5.675
1997-10-31	5.7348
1997-11-30	5.8325
1997-12-31	5.8738
1998-01-31	5.6438
1998-02-28	5.685
1998-03-31	5.6295
1998-04-30	5.648
1998-05-31	5.6632
1998-06-30	5.6695
1998-07-31	5.6422
1998-08-31	5.6345
1998-09-30	5.4714
1998-10-31	5.2618
1998-11-30	5.3105
1998-12-31	5.229
1999-01-31	4.984
1999-02-28	4.9815
1999-03-31	4.99
1999-04-30	4.953
1999-05-31	4.9889
1999-06-30	5.1805
1999-07-31	5.3077
1999-08-31	5.4633
1999-09-30	5.5655
1999-10-31	6.1971
1999-11-30	6.0968
1999-12-31	6.15
2000-01-31	6.037
2000-02-29	6.09
2000-03-31	6.2004
2000-04-30	6.3361
2000-05-31	6.7633
2000-06-30	6.8105
2000-07-31	6.7471
2000-08-31	6.6955
2000-09-30	6.6871
2000-10-31	6.7586
2000-11-30	6.7355
2000-12-31	6.5389
2001-01-31	5.7114
2001-02-28	5.3435
2001-03-31	4.9723
2001-04-30	4.6132
2001-05-31	4.0971
2001-06-30	3.8138
2001-07-31	3.7505
2001-08-31	3.5745
2001-09-30	3.015
2001-10-31	2.4017
2001-11-30	2.1036
2001-12-31	1.9168
2002-01-31	1.8241
2002-02-28	1.9065
2002-03-31	1.998
2002-04-30	1.97
2002-05-31	1.9073
2002-06-30	1.8878
2002-07-31	1.8539
2002-08-31	1.7886
2002-09-30	1.8124
2002-10-31	1.7935
2002-11-30	1.4795
2002-12-31	1.423
2003-01-31	1.3614
2003-02-28	1.338
2003-03-31	1.2862
2003-04-30	1.304
2003-05-31	1.2865
2003-06-30	1.1076
2003-07-31	1.1161
2003-08-31	1.136
2003-09-30	1.1441
2003-10-31	1.1635
2003-11-30	1.168
2003-12-31	1.1667
2004-01-31	1.1229
2004-02-29	1.112
2004-03-31	1.1052
2004-04-30	1.14
2004-05-31	1.25
2004-06-30	1.5023
2004-07-31	1.6268
2004-08-31	1.7395
2004-09-30	1.9309
2004-10-31	2.0952
2004-11-30	2.3209
2004-12-31	2.5086
2005-01-31	2.6675
2005-02-28	2.8345
2005-03-31	3.0255
2005-04-30	3.1519
2005-05-31	3.2725
2005-06-30	3.4389
2005-07-31	3.6076
2005-08-31	3.8182
2005-09-30	3.9205
2005-10-31	4.181
2005-11-30	4.3614
2005-12-31	4.502
2006-01-31	4.611
2006-02-28	4.7755
2006-03-31	4.937
2006-04-30	5.0756
2006-05-31	5.1924
2006-06-30	5.385
2006-07-31	5.5
2006-08-31	5.4114
2006-09-30	5.3757
2006-10-31	5.3764
2006-11-30	5.3773
2006-12-31	5.3579
2007-01-31	5.3586
2007-02-28	5.3705
2007-03-31	5.3505
2007-04-30	5.3563
2007-05-31	5.3557
2007-06-30	5.3629
2007-07-31	5.3682
2007-08-31	5.5055
2007-09-30	5.575
2007-10-31	5.1748
2007-11-30	5.0227
2007-12-31	5.0668
2008-01-31	3.9309
2008-02-29	3.1148
2008-03-31	2.8605
2008-04-30	3.0645
2008-05-31	2.914
2008-06-30	2.9876
2008-07-31	3.0513
2008-08-31	3.046
2008-09-30	3.7968
2008-10-31	4.9796
2008-11-30	3.4925
2008-12-31	2.4971
2009-01-31	1.6062
2009-02-28	1.7335
2009-03-31	1.7123
2009-04-30	1.4555
2009-05-31	1.0889
2009-06-30	1.0409
2009-07-31	0.86
2009-08-31	0.881
2009-09-30	0.6864
2009-10-31	0.6145
2009-11-30	0.529
2009-12-31	0.4476
2010-01-31	0.4595
2010-02-28	0.474
2010-03-31	0.5491
2010-04-30	0.5845
2010-05-31	0.7774
2010-06-30	0.9164
2010-07-31	0.9159
2010-08-31	0.6357
2010-09-30	0.5459
2010-10-31	0.5543
2010-11-30	0.5668
2010-12-31	0.4552
2011-01-31	0.5295
2011-02-28	0.4945
2011-03-31	0.4896
2011-04-30	0.5328
2011-05-31	0.4005
2011-06-30	0.4432
2011-07-31	0.53
2011-08-31	0.4691
2011-09-30	0.4659
2011-10-31	0.4981
2011-11-30	0.5141
2011-12-31	0.629
2012-01-31	0.5333
2012-02-29	0.4662
2012-03-31	0.4641
2012-04-30	0.5216
2012-05-31	0.5564
2012-06-30	0.5405
2012-07-31	0.5818
2012-08-31	0.5236
2012-09-30	0.4985
2012-10-31	0.4161
2012-11-30	0.4323
2012-12-31	0.4411
2013-01-31	0.455
2013-02-28	0.4825
2013-03-31	0.461
2013-04-30	0.4619
2013-05-31	0.4414
2013-06-30	0.394
2013-07-31	0.3717
2013-08-31	0.3595
2013-09-30	0.3395
2013-10-31	0.313
2013-11-30	0.2829
2013-12-31	0.301
2014-01-31	0.2859
2014-02-28	0.302
2014-03-31	0.2914
2014-04-30	0.277
2014-05-31	0.302
2014-06-30	0.3381
2014-07-31	0.333
2014-08-31	0.3865
2014-09-30	0.38
2014-10-31	0.3187
2014-11-30	0.3585
2014-12-31	0.4367
2015-01-31	0.4667
2015-02-28	0.43
2015-03-31	0.4414
2015-04-30	0.466
2015-05-31	0.3732
2015-06-30	0.4277
2015-07-31	0.46
2015-08-31	0.512
2015-09-30	0.5464
2015-10-31	0.5882
2015-11-30	0.7919
2015-12-31	0.8014
2016-01-31	0.8105
2016-02-29	0.8152
2016-03-31	0.8167
2016-04-30	0.8486
2016-05-31	0.8465
2016-06-30	0.9014
2016-07-31	1.0829
2016-08-31	0.9136
2016-09-30	0.9495
2016-10-31	0.9614
2016-11-30	0.9905
2016-12-31	1.021
2017-01-31	1.0819
2017-02-28	1.0995
2017-03-31	1.1996
2017-04-30	1.2294
2017-05-31	1.2352
2017-06-30	1.2991
2017-07-31	1.3562
2017-08-31	1.4441
2017-09-30	1.4571
2017-10-31	1.4968
2017-11-30	1.5868
2017-12-31	1.7511
2018-01-31	1.9286
2018-02-28	2.034
2018-03-31	2.3395
2018-04-30	2.5005
2018-05-31	2.4705
2018-06-30	2.4857
2018-07-31	2.4909
2018-08-31	2.4891
2018-09-30	2.5045
2018-10-31	2.603
2018-11-30	2.7864
2018-12-31	2.935
2019-01-31	2.9027
2019-02-28	2.7865
2019-03-31	2.7195
2019-04-30	2.7
2019-05-31	2.6348
2019-06-30	2.493
2019-07-31	2.4
2019-08-31	2.2576
2019-09-30	2.2314
2019-10-31	2.0683
2019-11-30	2.0071
2019-12-31	2
2020-01-31	1.9082
2020-02-29	1.7535