Month	Percent
1978-02-01	66.5614551
1978-03-01	65.0382902
1978-04-01	64.0749543
1978-05-01	63.3541688
1978-06-01	62.9209942
1978-07-01	63.2979154
1978-08-01	62.0626483
1978-09-01	62.0976543
1978-10-01	61.5496679
1978-11-01	61.6834970
1978-12-01	66.7168372
1979-01-01	65.1568593
1979-02-01	65.1149485
1979-03-01	64.3282870
1979-04-01	63.6687478
1979-05-01	63.2715410
1979-06-01	62.8943134
1979-07-01	62.6074315
1979-08-01	61.9300964
1979-09-01	63.8168458
1979-10-01	62.5145436
1979-11-01	63.3101094
1979-12-01	67.5563611
1980-01-01	66.4323526
1980-02-01	66.5151708
1980-03-01	66.3294749
1980-04-01	65.6914931
1980-05-01	66.1707091
1980-06-01	65.7552628
1980-07-01	65.5771679
1980-08-01	65.1042854
1980-09-01	66.7939480
1980-10-01	65.2739819
1980-11-01	65.1167758
1980-12-01	69.3422624
1981-01-01	67.0796883
1981-02-01	66.8117902
1981-03-01	66.4654346
1981-04-01	65.8218435
1981-05-01	65.1459113
1981-06-01	64.6513731
1981-07-01	65.0071956
1981-08-01	63.9231297
1981-09-01	65.6852557
1981-10-01	63.6038498
1981-11-01	63.5598445
1981-12-01	68.4518206
1982-01-01	67.3028433
1982-02-01	67.2663635
1982-03-01	66.8045270
1982-04-01	65.5857030
1982-05-01	65.8644217
1982-06-01	64.1887687
1982-07-01	64.1335143
1982-08-01	63.1811761
1982-09-01	64.0234936
1982-10-01	64.2106589
1982-11-01	63.7493136
1982-12-01	68.2088941
1983-01-01	66.8352340
1983-02-01	66.5299811
1983-03-01	65.7316849
1983-04-01	65.4939562
1983-05-01	66.0805378
1983-06-01	64.8712415
1983-07-01	64.8738632
1983-08-01	64.1144582
1983-09-01	66.0256823
1983-10-01	65.0980672
1983-11-01	65.4787938
1983-12-01	69.3275853
1984-01-01	67.9892540
1984-02-01	67.3875946
1984-03-01	67.9375888
1984-04-01	67.5071648
1984-05-01	66.5588173
1984-06-01	65.4136168
1984-07-01	64.9469940
1984-08-01	63.9173091
1984-09-01	65.6722446
1984-10-01	63.9304112
1984-11-01	64.4942104
1984-12-01	68.2617770
1985-01-01	67.3848548
1985-02-01	68.0800022
1985-03-01	67.4065119
1985-04-01	66.0570211
1985-05-01	66.8543994
1985-06-01	65.9485090
1985-07-01	65.6970867
1985-08-01	64.9669869
1985-09-01	67.3123918
1985-10-01	65.1648490
1985-11-01	66.1209968
1985-12-01	70.0594780
1986-01-01	68.8696352
1986-02-01	69.2121930
1986-03-01	68.8736931
1986-04-01	69.0336731
1986-05-01	67.8922031
1986-06-01	67.1368543
1986-07-01	66.8335351
1986-08-01	65.5457852
1986-09-01	67.8809031
1986-10-01	66.6426134
1986-11-01	66.5935073
1986-12-01	71.2775197
1987-01-01	69.6183612
1987-02-01	69.5061062
1987-03-01	69.3992419
1987-04-01	68.4897117
1987-05-01	66.8256636
1987-06-01	66.1322800
1987-07-01	67.5090867
1987-08-01	64.3757097
1987-09-01	66.2989732
1987-10-01	66.5584713
1987-11-01	66.2438040
1987-12-01	71.1523021
1988-01-01	69.8772891
1988-02-01	68.3818667
1988-03-01	69.2131623
1988-04-01	68.5627842
1988-05-01	66.6160250
1988-06-01	65.9232875
1988-07-01	65.1310212
1988-08-01	65.6070324
1988-09-01	66.7353874
1988-10-01	65.6738087
1988-11-01	65.3500331
1988-12-01	70.8065571
1989-01-01	70.6714918
1989-02-01	70.6972023
1989-03-01	68.8415423
1989-04-01	68.5357002
1989-05-01	68.7268570
1989-06-01	67.6282252
1989-07-01	68.3217845
1989-08-01	67.0492511
1989-09-01	68.2718910
1989-10-01	67.8724301
1989-11-01	66.6011958
1989-12-01	71.3217687
1990-01-01	71.4126070
1990-02-01	70.2282992
1990-03-01	68.8278421
1990-04-01	68.8220456
1990-05-01	68.6183318
1990-06-01	67.5140776
1990-07-01	69.4263131
1990-08-01	67.7099931
1990-09-01	67.9060070
1990-10-01	67.0095663
1990-11-01	66.5175460
1990-12-01	72.2729712
1991-01-01	70.0219366
1991-02-01	68.3076926
1991-03-01	67.7779905
1991-04-01	68.0566915
1991-05-01	66.4782418
1991-06-01	64.5788591
1991-07-01	65.1709582
1991-08-01	64.6430691
1991-09-01	66.4119741
1991-10-01	64.5755206
1991-11-01	63.9286305
1991-12-01	70.2992297
1992-01-01	68.4290861
1992-02-01	67.6748668
1992-03-01	66.5048474
1992-04-01	66.1413853
1992-05-01	65.6742219
1992-06-01	65.2049204
1992-07-01	66.0682643
1992-08-01	65.0853994
1992-09-01	66.5466996
1992-10-01	65.8200640
1992-11-01	64.1133747
1992-12-01	70.5538776
1993-01-01	69.5627870
1993-02-01	67.5968847
1993-03-01	66.1172816
1993-04-01	64.5746380
1993-05-01	64.4015110
1993-06-01	64.1665040
1993-07-01	63.9371864
1993-08-01	63.3240430
1993-09-01	65.6525530
1993-10-01	64.7735389
1993-11-01	64.6630522
1993-12-01	69.8826441
1994-01-01	70.2980477
1994-02-01	69.1176707
1994-03-01	68.8717429
1994-04-01	67.9177614
1994-05-01	66.7304522
1994-06-01	66.6673293
1994-07-01	68.0385501
1994-08-01	65.8052876
1994-09-01	68.4509331
1994-10-01	66.9409538
1994-11-01	66.9525666
1994-12-01	71.9100274
1995-01-01	70.7358795
1995-02-01	71.1858855
1995-03-01	70.6668997
1995-04-01	69.7123298
1995-05-01	69.0720996
1995-06-01	68.5924169
1995-07-01	68.1976896
1995-08-01	67.5038635
1995-09-01	69.2225811
1995-10-01	68.6177733
1995-11-01	68.6255836
1995-12-01	72.5299021
1996-01-01	72.4391162
1996-02-01	70.3377494
1996-03-01	69.5584672
1996-04-01	70.0205695
1996-05-01	69.6172895
1996-06-01	68.2014584
1996-07-01	69.6765021
1996-08-01	67.5894029
1996-09-01	68.8387501
1996-10-01	68.3295986
1996-11-01	66.5059314
1996-12-01	72.6456900
1997-01-01	70.7137260
1997-02-01	69.2563270
1997-03-01	68.9063294
1997-04-01	67.6003771
1997-05-01	67.3319232
1997-06-01	65.8780955
1997-07-01	66.2567031
1997-08-01	64.6733288
1997-09-01	66.7913625
1997-10-01	66.1679853
1997-11-01	66.2176194
1997-12-01	70.3825310
1998-01-01	70.3677323
1998-02-01	68.2925401
1998-03-01	67.3213525
1998-04-01	67.2523418
1998-05-01	66.4853950
1998-06-01	66.4321913
1998-07-01	66.6112561
1998-08-01	64.8259879
1998-09-01	68.3301337
1998-10-01	67.0762479
1998-11-01	66.9748013
1998-12-01	71.2971735
1999-01-01	70.1713852
1999-02-01	69.4151654
1999-03-01	68.9109642
1999-04-01	68.4584841
1999-05-01	67.3160258
1999-06-01	66.2482136
1999-07-01	66.7331175
1999-08-01	65.2617693
1999-09-01	67.8924353
1999-10-01	67.4914480
1999-11-01	66.5390109
1999-12-01	71.1613025
2000-01-01	69.2228425
2000-02-01	69.1537152
2000-03-01	69.0724505
2000-04-01	68.2217217
2000-05-01	68.4938564
2000-06-01	67.0062241
2000-07-01	68.0131392
2000-08-01	67.3226348
2000-09-01	68.7269919
2000-10-01	67.3695861
2000-11-01	66.9675773
2000-12-01	71.8725291
2001-01-01	70.3444189
2001-02-01	70.1262653
2001-03-01	69.4968006
2001-04-01	69.1614810
2001-05-01	69.5700837
2001-06-01	68.4816022
2001-07-01	68.0663951
2001-08-01	67.2152732
2001-09-01	68.1486567
2001-10-01	68.0335384
2001-11-01	67.5923275
2001-12-01	72.5523518
2002-01-01	70.9941525
2002-02-01	69.7270981
2002-03-01	67.9429149
2002-04-01	66.9460006
2002-05-01	67.0386997
2002-06-01	66.7712570
2002-07-01	66.3066698
2002-08-01	66.3717284
2002-09-01	68.9478438
2002-10-01	67.9764133
2002-11-01	67.5856493
2002-12-01	72.0724779
2003-01-01	71.7560219
2003-02-01	71.1097604
2003-03-01	69.5108558
2003-04-01	68.6227111
2003-05-01	68.1678157
2003-06-01	67.3319569
2003-07-01	67.8010471
2003-08-01	66.5438692
2003-09-01	68.2268278
2003-10-01	68.3160807
2003-11-01	68.1157967
2003-12-01	72.6150484
2004-01-01	71.4441300
2004-02-01	70.6267030
2004-03-01	70.1296497
2004-04-01	69.6702391
2004-05-01	68.5994569
2004-06-01	67.7184204
2004-07-01	67.8364915
2004-08-01	65.9152367
2004-09-01	68.3577988
2004-10-01	67.8564712
2004-11-01	67.3008418
2004-12-01	73.4440016
2005-01-01	71.4347168
2005-02-01	70.8507191
2005-03-01	70.2010432
2005-04-01	69.8377672
2005-05-01	69.0231209
2005-06-01	68.7175471
2005-07-01	68.8028864
2005-08-01	67.4182292
2005-09-01	69.2614076
2005-10-01	68.3954973
2005-11-01	68.2208593
2005-12-01	72.6461313
2006-01-01	71.7633134
2006-02-01	70.6526505
2006-03-01	69.2133270
2006-04-01	69.3244540
2006-05-01	68.5895037
2006-06-01	68.7911330
2006-07-01	69.2193889
2006-08-01	68.0409897
2006-09-01	69.3137081
2006-10-01	68.1553929
2006-11-01	67.7002900
2006-12-01	73.0766243
2007-01-01	71.5499492
2007-02-01	71.0510096
2007-03-01	69.4685896
2007-04-01	69.9560813
2007-05-01	69.6157718
2007-06-01	68.0338347
2007-07-01	68.1435367
2007-08-01	67.7534270
2007-09-01	69.8269408
2007-10-01	69.2768749
2007-11-01	68.4835284
2007-12-01	73.1228109
2008-01-01	72.5508463
2008-02-01	70.3430882
2008-03-01	70.0203624
2008-04-01	70.8277524
2008-05-01	69.4748465
2008-06-01	69.0801650
2008-07-01	69.5101204
2008-08-01	67.0554672
2008-09-01	68.6848239
2008-10-01	68.1076308
2008-11-01	66.9554135
2008-12-01	71.1128911
2009-01-01	69.8212735
2009-02-01	69.2566316
2009-03-01	69.4400849
2009-04-01	68.1044079
2009-05-01	66.7761883
2009-06-01	66.3112433
2009-07-01	66.0362431
2009-08-01	64.8421808
2009-09-01	66.9361117
2009-10-01	67.3461692
2009-11-01	66.7770658
2009-12-01	71.1369187
2010-01-01	69.4928689
2010-02-01	68.9950321
2010-03-01	68.2890119
2010-04-01	67.3031445
2010-05-01	66.8124717
2010-06-01	65.8550606
2010-07-01	66.5114180
2010-08-01	64.9344204
2010-09-01	65.9107114
2010-10-01	66.1330835
2010-11-01	65.6907930
2010-12-01	70.3573874
2011-01-01	69.8089219
2011-02-01	69.7571825
2011-03-01	68.8115705
2011-04-01	67.5786127
2011-05-01	67.2278755
2011-06-01	66.2599831
2011-07-01	66.0353915
2011-08-01	65.5269442
2011-09-01	67.6850311
2011-10-01	67.1331746
2011-11-01	65.9435455
2011-12-01	67.8933827
2012-01-01	68.9796167
2012-02-01	68.7492410
2012-03-01	68.1936919
2012-04-01	66.8649071
2012-05-01	68.0015850
2012-06-01	66.6064848
2012-07-01	65.9624376
2012-08-01	63.2421655
2012-09-01	65.7988777
2012-10-01	65.6146034
2012-11-01	64.0441064
2012-12-01	69.3495900
2013-01-01	68.9846851
2013-02-01	67.2055368
2013-03-01	66.4948405
2013-04-01	66.7095497
2013-05-01	65.5698129
2013-06-01	64.9751515
2013-07-01	65.8632513
2013-08-01	64.6971712
2013-09-01	66.3932815
2013-10-01	65.8505821
2013-11-01	64.8116070
2013-12-01	67.6198036
2014-01-01	68.5266501
2014-02-01	67.0952315
2014-03-01	66.9853394
2014-04-01	66.1519631
2014-05-01	66.2954788
2014-06-01	64.9740845
2014-07-01	65.5929240
2014-08-01	65.0261445
2014-09-01	65.0050138
2014-10-01	65.5341351
2014-11-01	64.9477273
2014-12-01	68.8868376
2015-01-01	67.5261547
2015-02-01	67.8036570
2015-03-01	66.7649702
2015-04-01	66.8486907
2015-05-01	66.0937807
2015-06-01	66.1892648
2015-07-01	67.2552898
2015-08-01	64.9217835
2015-09-01	65.2243219
2015-10-01	65.7198467
2015-11-01	66.5156224
2015-12-01	69.8185839
2016-01-01	67.6241301
2016-02-01	68.0056469
2016-03-01	66.4191411
2016-04-01	67.3032874
2016-05-01	66.3711588
2016-06-01	67.0303476
2016-07-01	66.2266227
2016-08-01	64.2869752
2016-09-01	64.7756352
2016-10-01	65.0162841
2016-11-01	64.9832559
2016-12-01	68.2883118
2017-01-01	68.4365489
2017-02-01	66.7135672
2017-03-01	66.1338112
2017-04-01	65.2354260
2017-05-01	65.2592487
2017-06-01	65.3314877
2017-07-01	65.5834204
2017-08-01	65.3151795
2017-09-01	66.4133580
2017-10-01	65.8955759
2017-11-01	66.0706446
2017-12-01	69.7015243
2018-01-01	69.4934054
2018-02-01	69.4978605
2018-03-01	67.9646069
2018-04-01	67.4111510
2018-05-01	68.0362394
2018-06-01	67.3573208
2018-07-01	66.2042519
2018-08-01	65.8974871
2018-09-01	65.9397215