Month	Percent
1978-02-01	88.0777295
1978-03-01	87.3839588
1978-04-01	87.1037383
1978-05-01	86.9028859
1978-06-01	86.8742091
1978-07-01	86.3732005
1978-08-01	86.1411718
1978-09-01	86.2103301
1978-10-01	86.1763833
1978-11-01	85.8382392
1978-12-01	87.9526315
1979-01-01	87.0133619
1979-02-01	87.3043622
1979-03-01	87.0183990
1979-04-01	86.7724463
1979-05-01	86.5501979
1979-06-01	86.3571917
1979-07-01	86.2156560
1979-08-01	85.9007248
1979-09-01	86.6110629
1979-10-01	86.1893833
1979-11-01	85.8243648
1979-12-01	87.7856206
1980-01-01	87.0169501
1980-02-01	87.1327618
1980-03-01	86.8664222
1980-04-01	86.2330335
1980-05-01	87.0509780
1980-06-01	86.4935247
1980-07-01	86.4616607
1980-08-01	86.1764676
1980-09-01	86.9004478
1980-10-01	86.1350093
1980-11-01	85.8678964
1980-12-01	88.1217345
1981-01-01	86.9702854
1981-02-01	87.2410882
1981-03-01	87.1155243
1981-04-01	86.6198511
1981-05-01	86.5542554
1981-06-01	86.1907273
1981-07-01	86.3849168
1981-08-01	85.9392610
1981-09-01	86.8089244
1981-10-01	85.8132264
1981-11-01	85.5233750
1981-12-01	87.2206153
1982-01-01	86.3800216
1982-02-01	86.9455734
1982-03-01	86.7126632
1982-04-01	85.7735226
1982-05-01	86.0050708
1982-06-01	85.5559520
1982-07-01	85.6594027
1982-08-01	85.1166424
1982-09-01	86.2072211
1982-10-01	85.8815867
1982-11-01	85.3412417
1982-12-01	86.7779644
1983-01-01	85.7496007
1983-02-01	86.3422946
1983-03-01	85.9249353
1983-04-01	85.2977276
1983-05-01	85.3388547
1983-06-01	84.8641095
1983-07-01	85.0930454
1983-08-01	84.4274049
1983-09-01	85.5972740
1983-10-01	84.5959133
1983-11-01	84.3312737
1983-12-01	86.1379635
1984-01-01	85.1700307
1984-02-01	85.6471037
1984-03-01	85.8060473
1984-04-01	85.0228970
1984-05-01	84.9817724
1984-06-01	84.7881631
1984-07-01	84.7835387
1984-08-01	84.1804869
1984-09-01	84.8862861
1984-10-01	84.0912654
1984-11-01	83.9249269
1984-12-01	85.0906308
1985-01-01	84.5557580
1985-02-01	84.9782384
1985-03-01	84.9132720
1985-04-01	83.8982901
1985-05-01	84.2850839
1985-06-01	84.1576529
1985-07-01	83.9159329
1985-08-01	83.8737160
1985-09-01	85.0430822
1985-10-01	83.7895223
1985-11-01	84.6084999
1985-12-01	85.2922858
1986-01-01	85.0180615
1986-02-01	85.2525337
1986-03-01	85.3428321
1986-04-01	84.9924472
1986-05-01	84.6043664
1986-06-01	84.6989894
1986-07-01	84.3985775
1986-08-01	83.9900850
1986-09-01	85.1299239
1986-10-01	84.3383628
1986-11-01	83.9608316
1986-12-01	85.7811694
1987-01-01	84.5306289
1987-02-01	84.8720526
1987-03-01	85.3022926
1987-04-01	84.4118527
1987-05-01	84.3073583
1987-06-01	84.3164402
1987-07-01	84.6739941
1987-08-01	83.7096271
1987-09-01	84.0326718
1987-10-01	83.7595813
1987-11-01	83.1239517
1987-12-01	85.2251136
1988-01-01	84.5577172
1988-02-01	84.5750304
1988-03-01	85.1037501
1988-04-01	85.0627366
1988-05-01	84.1804017
1988-06-01	84.2223144
1988-07-01	83.9340997
1988-08-01	83.2306031
1988-09-01	84.3982196
1988-10-01	83.8709639
1988-11-01	83.6350624
1988-12-01	85.3063596
1989-01-01	84.3198821
1989-02-01	85.0803655
1989-03-01	84.6615717
1989-04-01	84.7193674
1989-05-01	84.7347132
1989-06-01	84.2896065
1989-07-01	84.6447121
1989-08-01	84.1504884
1989-09-01	85.1676448
1989-10-01	84.4545070
1989-11-01	84.4399810
1989-12-01	85.6653880
1990-01-01	84.8208243
1990-02-01	85.0159064
1990-03-01	84.9402034
1990-04-01	84.9112647
1990-05-01	85.1042861
1990-06-01	84.7263850
1990-07-01	85.2839846
1990-08-01	84.3689544
1990-09-01	85.5060532
1990-10-01	84.8241065
1990-11-01	84.5175428
1990-12-01	86.0390057
1991-01-01	84.8389345
1991-02-01	85.0834019
1991-03-01	84.7757604
1991-04-01	84.8556056
1991-05-01	84.3069712
1991-06-01	83.6611364
1991-07-01	83.2338430
1991-08-01	83.2771348
1991-09-01	84.3322847
1991-10-01	83.5437988
1991-11-01	83.2159774
1991-12-01	85.0134882
1992-01-01	84.1751324
1992-02-01	84.4201729
1992-03-01	84.0462126
1992-04-01	83.6969624
1992-05-01	83.6942519
1992-06-01	83.4790137
1992-07-01	83.9418206
1992-08-01	83.1030199
1992-09-01	83.8199860
1992-10-01	83.5856086
1992-11-01	82.6091809
1992-12-01	84.4504362
1993-01-01	84.1039156
1993-02-01	83.7673717
1993-03-01	83.6994283
1993-04-01	82.9189004
1993-05-01	83.2059022
1993-06-01	83.2069915
1993-07-01	83.1393943
1993-08-01	82.4299607
1993-09-01	83.5747191
1993-10-01	83.3094158
1993-11-01	83.0250240
1993-12-01	84.5865993
1994-01-01	83.9548999
1994-02-01	84.0204864
1994-03-01	83.8590055
1994-04-01	83.3192825
1994-05-01	83.2287104
1994-06-01	83.1849579
1994-07-01	83.4693633
1994-08-01	82.6925930
1994-09-01	83.8682570
1994-10-01	83.1577093
1994-11-01	82.8783742
1994-12-01	84.4399234
1995-01-01	83.8125665
1995-02-01	84.4169599
1995-03-01	83.7132752
1995-04-01	83.7603510
1995-05-01	83.6308920
1995-06-01	83.4547882
1995-07-01	83.5354780
1995-08-01	83.1410874
1995-09-01	84.5563622
1995-10-01	83.4467843
1995-11-01	83.5799019
1995-12-01	84.7663029
1996-01-01	84.1847984
1996-02-01	84.3854024
1996-03-01	83.8724413
1996-04-01	83.6144836
1996-05-01	83.5832895
1996-06-01	83.3674365
1996-07-01	83.4237141
1996-08-01	83.2300205
1996-09-01	83.9509677
1996-10-01	83.3516494
1996-11-01	82.9515108
1996-12-01	84.4308929
1997-01-01	83.8311673
1997-02-01	83.8186046
1997-03-01	83.6261474
1997-04-01	83.2042413
1997-05-01	82.8889674
1997-06-01	82.7077885
1997-07-01	82.9223214
1997-08-01	81.7834582
1997-09-01	83.2303438
1997-10-01	82.5157089
1997-11-01	82.6931301
1997-12-01	83.8156704
1998-01-01	83.2199940
1998-02-01	83.2705984
1998-03-01	83.0127511
1998-04-01	82.6835065
1998-05-01	82.7654511
1998-06-01	82.7451799
1998-07-01	82.7127627
1998-08-01	81.9875131
1998-09-01	83.6196966
1998-10-01	82.5970710
1998-11-01	82.3360475
1998-12-01	83.3442789
1999-01-01	82.5706736
1999-02-01	82.9560340
1999-03-01	82.7271631
1999-04-01	82.5302194
1999-05-01	82.1703554
1999-06-01	82.2713416
1999-07-01	82.3261573
1999-08-01	81.8698932
1999-09-01	83.0520560
1999-10-01	82.2907011
1999-11-01	81.7291368
1999-12-01	83.4675009
2000-01-01	82.2252355
2000-02-01	82.5792048
2000-03-01	82.2821592
2000-04-01	82.4308302
2000-05-01	82.1180836
2000-06-01	82.1990037
2000-07-01	82.5837100
2000-08-01	81.6485812
2000-09-01	82.9411425
2000-10-01	82.1078871
2000-11-01	81.6879447
2000-12-01	83.1130700
2001-01-01	81.9997219
2001-02-01	82.4806472
2001-03-01	81.7427083
2001-04-01	82.2643863
2001-05-01	82.1223252
2001-06-01	82.1266379
2001-07-01	82.2118146
2001-08-01	81.5345327
2001-09-01	82.7737832
2001-10-01	82.2319460
2001-11-01	81.7359461
2001-12-01	82.9823188
2002-01-01	82.3908034
2002-02-01	82.7348872
2002-03-01	82.2562511
2002-04-01	82.2143058
2002-05-01	82.0402908
2002-06-01	82.1141390
2002-07-01	81.6362587
2002-08-01	81.4192705
2002-09-01	82.4845011
2002-10-01	81.6470315
2002-11-01	81.6802436
2002-12-01	83.1954779
2003-01-01	82.5498744
2003-02-01	82.7987701
2003-03-01	82.1889380
2003-04-01	81.9421885
2003-05-01	81.7098933
2003-06-01	81.5274967
2003-07-01	81.3905256
2003-08-01	81.0097025
2003-09-01	82.1938425
2003-10-01	81.9303411
2003-11-01	81.3107326
2003-12-01	83.0794653
2004-01-01	82.1537082
2004-02-01	82.4393628
2004-03-01	82.0614880
2004-04-01	82.1861219
2004-05-01	81.9117671
2004-06-01	81.8923233
2004-07-01	81.7728401
2004-08-01	80.8794297
2004-09-01	82.4663883
2004-10-01	81.8321918
2004-11-01	81.6263666
2004-12-01	82.9381073
2005-01-01	82.2348893
2005-02-01	82.7393180
2005-03-01	82.7084341
2005-04-01	82.9508226
2005-05-01	82.5655069
2005-06-01	82.5794661
2005-07-01	82.3535835
2005-08-01	82.1584303
2005-09-01	83.1390543
2005-10-01	82.4007619
2005-11-01	82.1059231
2005-12-01	83.4716261
2006-01-01	82.4407067
2006-02-01	83.1051092
2006-03-01	82.9663063
2006-04-01	82.6892127
2006-05-01	82.3695316
2006-06-01	82.5625442
2006-07-01	82.7818901
2006-08-01	82.1894566
2006-09-01	83.4097927
2006-10-01	82.5616627
2006-11-01	82.1269770
2006-12-01	83.7251548
2007-01-01	82.5565095
2007-02-01	83.1441582
2007-03-01	83.0715206
2007-04-01	82.9924582
2007-05-01	82.9413851
2007-06-01	82.8857593
2007-07-01	82.8257489
2007-08-01	82.3060596
2007-09-01	83.3003787
2007-10-01	82.7340850
2007-11-01	82.6798615
2007-12-01	84.1362335
2008-01-01	83.2471423
2008-02-01	83.2902022
2008-03-01	83.2909100
2008-04-01	83.1917311
2008-05-01	83.0077703
2008-06-01	83.1986989
2008-07-01	82.7813310
2008-08-01	82.1817556
2008-09-01	83.4218735
2008-10-01	82.9108519
2008-11-01	82.2817215
2008-12-01	83.7412914
2009-01-01	82.6890509
2009-02-01	83.2422544
2009-03-01	82.9459791
2009-04-01	82.8222448
2009-05-01	82.7861689
2009-06-01	82.3644470
2009-07-01	82.2996434
2009-08-01	81.7590724
2009-09-01	82.7447688
2009-10-01	82.2600123
2009-11-01	82.0201764
2009-12-01	83.4189774
2010-01-01	82.7073653
2010-02-01	83.2053986
2010-03-01	83.0495705
2010-04-01	82.9237062
2010-05-01	82.4933397
2010-06-01	82.5269925
2010-07-01	82.6528954
2010-08-01	81.9453582
2010-09-01	83.2980058
2010-10-01	83.1478949
2010-11-01	82.7291965
2010-12-01	84.0873519
2011-01-01	83.1711679
2011-02-01	83.6339376
2011-03-01	83.3009191
2011-04-01	82.9103127
2011-05-01	82.8349272
2011-06-01	82.4492059
2011-07-01	82.6076545
2011-08-01	82.0190524
2011-09-01	83.0852673
2011-10-01	82.7043712
2011-11-01	82.2231972
2011-12-01	83.1763792
2012-01-01	82.4953846
2012-02-01	82.9294149
2012-03-01	82.6591706
2012-04-01	82.4300473
2012-05-01	82.5537392
2012-06-01	82.1195615
2012-07-01	82.2464609
2012-08-01	81.5868420
2012-09-01	82.8977233
2012-10-01	82.4953049
2012-11-01	81.9712871
2012-12-01	83.3745306
2013-01-01	82.4830970
2013-02-01	83.0655701
2013-03-01	82.7639918
2013-04-01	82.5154269
2013-05-01	82.6010938
2013-06-01	82.3951810
2013-07-01	82.3287469
2013-08-01	81.4952208
2013-09-01	82.3961891
2013-10-01	82.1625191
2013-11-01	81.6935353
2013-12-01	82.6711913
2014-01-01	81.8289454
2014-02-01	82.7018320
2014-03-01	82.1893383
2014-04-01	82.1644592
2014-05-01	81.8260319
2014-06-01	81.9333272
2014-07-01	82.1411662
2014-08-01	81.8169582
2014-09-01	81.7738205
2014-10-01	81.9539315
2014-11-01	82.1757236
2014-12-01	82.9035812
2015-01-01	82.4310589
2015-02-01	83.4913560
2015-03-01	83.1557282
2015-04-01	82.7170961
2015-05-01	82.8616391
2015-06-01	82.4063079
2015-07-01	82.7076996
2015-08-01	82.1071095
2015-09-01	82.3181659
2015-10-01	82.5349565
2015-11-01	82.3195984
2015-12-01	83.2112266
2016-01-01	82.8070666
2016-02-01	83.2392329
2016-03-01	82.6758954
2016-04-01	82.3472924
2016-05-01	82.5526317
2016-06-01	82.0392753
2016-07-01	82.1821931
2016-08-01	81.7078536
2016-09-01	81.6482624
2016-10-01	81.8335956
2016-11-01	81.9618972
2016-12-01	82.9684944
2017-01-01	81.6039985
2017-02-01	83.0871668
2017-03-01	82.7813958
2017-04-01	82.7336517
2017-05-01	82.6211906
2017-06-01	82.3898646
2017-07-01	82.6048671
2017-08-01	82.1549676
2017-09-01	82.5437966
2017-10-01	82.2517054
2017-11-01	82.7618380
2017-12-01	83.7248107
2018-01-01	82.7340636
2018-02-01	83.7097897
2018-03-01	83.1249780
2018-04-01	83.0350814
2018-05-01	82.7909260
2018-06-01	82.8582347
2018-07-01	82.7579425
2018-08-01	82.4306906
2018-09-01	82.4485693