Month	Percent
1978-02-01	55.5776160
1978-03-01	55.4477611
1978-04-01	55.3562297
1978-05-01	55.0426475
1978-06-01	54.9837307
1978-07-01	55.4610826
1978-08-01	53.8515790
1978-09-01	54.4227308
1978-10-01	54.0521063
1978-11-01	54.0589818
1978-12-01	55.3970587
1979-01-01	54.7621529
1979-02-01	54.8578280
1979-03-01	54.7108007
1979-04-01	54.3966641
1979-05-01	53.9903189
1979-06-01	53.8895821
1979-07-01	54.1605394
1979-08-01	53.4918039
1979-09-01	54.6216203
1979-10-01	53.7493746
1979-11-01	55.2073342
1979-12-01	57.1668314
1980-01-01	55.9674970
1980-02-01	56.4076095
1980-03-01	57.0495834
1980-04-01	56.4186208
1980-05-01	56.7046883
1980-06-01	56.5086847
1980-07-01	57.1517606
1980-08-01	56.3047387
1980-09-01	57.9260971
1980-10-01	56.9594851
1980-11-01	57.1534510
1980-12-01	58.9071567
1981-01-01	56.8621569
1981-02-01	57.2937795
1981-03-01	57.4096567
1981-04-01	57.3530908
1981-05-01	57.0162767
1981-06-01	57.1061290
1981-07-01	56.4782928
1981-08-01	56.0069538
1981-09-01	57.5760134
1981-10-01	56.3410879
1981-11-01	56.3739397
1981-12-01	58.7223973
1982-01-01	56.9185347
1982-02-01	56.8165273
1982-03-01	57.2524868
1982-04-01	56.5348183
1982-05-01	56.7241731
1982-06-01	55.2450685
1982-07-01	55.7494397
1982-08-01	55.3701634
1982-09-01	55.2923422
1982-10-01	54.7172838
1982-11-01	54.2896260
1982-12-01	55.5733605
1983-01-01	54.0124661
1983-02-01	53.2736667
1983-03-01	53.7241672
1983-04-01	53.9809066
1983-05-01	54.6566998
1983-06-01	54.4223639
1983-07-01	54.8158060
1983-08-01	53.7717750
1983-09-01	54.9485113
1983-10-01	55.2129294
1983-11-01	55.9457625
1983-12-01	57.2553393
1984-01-01	55.6542933
1984-02-01	54.6694855
1984-03-01	56.3923110
1984-04-01	56.0960390
1984-05-01	56.4134155
1984-06-01	55.1678348
1984-07-01	55.3541102
1984-08-01	54.7864417
1984-09-01	56.0747444
1984-10-01	55.1143000
1984-11-01	54.9723167
1984-12-01	57.0295134
1985-01-01	55.9751385
1985-02-01	56.2764960
1985-03-01	56.4110588
1985-04-01	56.2673272
1985-05-01	57.2305974
1985-06-01	56.7592172
1985-07-01	57.1508121
1985-08-01	56.3335680
1985-09-01	57.7056802
1985-10-01	56.8899976
1985-11-01	57.3884131
1985-12-01	59.0447805
1986-01-01	57.5420630
1986-02-01	57.9324404
1986-03-01	58.3587352
1986-04-01	58.7597334
1986-05-01	58.2563610
1986-06-01	58.0870966
1986-07-01	57.3464274
1986-08-01	56.3426468
1986-09-01	57.8339462
1986-10-01	57.2455065
1986-11-01	57.5677534
1986-12-01	59.8386925
1987-01-01	58.0225583
1987-02-01	57.6611805
1987-03-01	57.9181542
1987-04-01	57.8594149
1987-05-01	57.3299211
1987-06-01	56.9372473
1987-07-01	57.9777981
1987-08-01	55.1792354
1987-09-01	57.0455766
1987-10-01	57.7864624
1987-11-01	57.5939126
1987-12-01	60.4840606
1988-01-01	58.7295690
1988-02-01	58.0166928
1988-03-01	58.4788320
1988-04-01	58.5837697
1988-05-01	58.0339004
1988-06-01	57.0965952
1988-07-01	57.6026474
1988-08-01	57.0101963
1988-09-01	58.5867542
1988-10-01	57.9620285
1988-11-01	58.1247111
1988-12-01	60.8922891
1989-01-01	60.9505473
1989-02-01	60.9992841
1989-03-01	60.1728457
1989-04-01	60.6258703
1989-05-01	60.5797674
1989-06-01	60.1747879
1989-07-01	60.6148504
1989-08-01	59.8081613
1989-09-01	60.4272195
1989-10-01	60.5131434
1989-11-01	60.1301729
1989-12-01	62.9634459
1990-01-01	61.9578681
1990-02-01	60.3554300
1990-03-01	60.0645890
1990-04-01	60.4504666
1990-05-01	60.5519517
1990-06-01	59.9236444
1990-07-01	61.1938275
1990-08-01	59.3293107
1990-09-01	59.0454686
1990-10-01	58.4847087
1990-11-01	58.0562173
1990-12-01	61.2167161
1991-01-01	58.3494248
1991-02-01	56.9569612
1991-03-01	56.5320290
1991-04-01	56.7380395
1991-05-01	55.6185836
1991-06-01	54.7150473
1991-07-01	54.9577473
1991-08-01	54.5910451
1991-09-01	55.5652859
1991-10-01	54.8247797
1991-11-01	53.7111169
1991-12-01	57.3313323
1992-01-01	55.4937404
1992-02-01	54.3001546
1992-03-01	53.9523196
1992-04-01	54.8192886
1992-05-01	54.3098271
1992-06-01	53.9810236
1992-07-01	55.1769877
1992-08-01	53.5632823
1992-09-01	55.4405813
1992-10-01	54.9914126
1992-11-01	53.6715033
1992-12-01	57.4601416
1993-01-01	56.4884899
1993-02-01	54.6070929
1993-03-01	54.0270856
1993-04-01	53.9969355
1993-05-01	53.9507080
1993-06-01	53.3899299
1993-07-01	53.9043053
1993-08-01	52.9450362
1993-09-01	54.2779089
1993-10-01	53.9606815
1993-11-01	54.0463137
1993-12-01	57.1547762
1994-01-01	55.8626624
1994-02-01	55.6690038
1994-03-01	55.8848043
1994-04-01	56.5478351
1994-05-01	56.2429053
1994-06-01	56.1305804
1994-07-01	57.9033809
1994-08-01	55.7005599
1994-09-01	57.6755791
1994-10-01	57.6899631
1994-11-01	58.2078190
1994-12-01	61.0958654
1995-01-01	58.8486373
1995-02-01	58.4293995
1995-03-01	59.1751063
1995-04-01	59.7510233
1995-05-01	58.8039356
1995-06-01	59.3366628
1995-07-01	59.3827845
1995-08-01	57.8777486
1995-09-01	59.5181127
1995-10-01	58.9496605
1995-11-01	59.0341352
1995-12-01	61.7091124
1996-01-01	60.5440473
1996-02-01	58.4721707
1996-03-01	58.5822864
1996-04-01	59.5573637
1996-05-01	59.5410507
1996-06-01	59.3691894
1996-07-01	59.7056799
1996-08-01	57.9658502
1996-09-01	58.7590401
1996-10-01	58.8297152
1996-11-01	57.7675807
1996-12-01	61.0988162
1997-01-01	59.4925565
1997-02-01	57.2528840
1997-03-01	58.0892713
1997-04-01	57.5501837
1997-05-01	57.3774350
1997-06-01	56.3213825
1997-07-01	57.2817636
1997-08-01	55.2116626
1997-09-01	57.8679242
1997-10-01	57.4541784
1997-11-01	57.3988070
1997-12-01	60.1112047
1998-01-01	58.8842992
1998-02-01	57.7447645
1998-03-01	57.3091675
1998-04-01	57.5758461
1998-05-01	57.6273485
1998-06-01	57.9761769
1998-07-01	58.5978055
1998-08-01	56.6552432
1998-09-01	59.5361630
1998-10-01	58.9356744
1998-11-01	58.4971316
1998-12-01	62.1044595
1999-01-01	60.2735406
1999-02-01	59.3503889
1999-03-01	59.0252862
1999-04-01	59.6583000
1999-05-01	58.6146113
1999-06-01	58.7380640
1999-07-01	59.7887510
1999-08-01	57.5235493
1999-09-01	59.2958233
1999-10-01	59.8326924
1999-11-01	59.1984349
1999-12-01	62.8105025
2000-01-01	59.9568713
2000-02-01	59.5835877
2000-03-01	60.3626545
2000-04-01	60.3735082
2000-05-01	60.6139361
2000-06-01	60.3658717
2000-07-01	61.7967580
2000-08-01	60.0164895
2000-09-01	61.4322393
2000-10-01	60.7323325
2000-11-01	60.4593669
2000-12-01	63.4698261
2001-01-01	61.9688931
2001-02-01	60.4123097
2001-03-01	60.2962427
2001-04-01	60.6988463
2001-05-01	60.5328477
2001-06-01	60.2555092
2001-07-01	60.0906191
2001-08-01	59.0923156
2001-09-01	60.0302862
2001-10-01	60.0734455
2001-11-01	60.2785005
2001-12-01	63.2181683
2002-01-01	61.0957300
2002-02-01	60.2921792
2002-03-01	59.2035577
2002-04-01	59.6796653
2002-05-01	59.6577499
2002-06-01	58.8436003
2002-07-01	59.7266975
2002-08-01	58.5612813
2002-09-01	60.6087905
2002-10-01	60.4548485
2002-11-01	60.6118219
2002-12-01	63.8736536
2003-01-01	63.0542138
2003-02-01	62.2212574
2003-03-01	60.5257925
2003-04-01	61.0246828
2003-05-01	60.5710078
2003-06-01	60.4739548
2003-07-01	60.9867811
2003-08-01	59.4025735
2003-09-01	60.6218115
2003-10-01	61.1295703
2003-11-01	60.8427162
2003-12-01	63.8157002
2004-01-01	62.0449682
2004-02-01	61.7778358
2004-03-01	61.8359555
2004-04-01	62.4157054
2004-05-01	61.4030593
2004-06-01	60.9911291
2004-07-01	61.0400680
2004-08-01	58.7973110
2004-09-01	61.1396001
2004-10-01	61.0467427
2004-11-01	61.0519390
2004-12-01	65.2282561
2005-01-01	62.8081567
2005-02-01	62.7310555
2005-03-01	61.7430009
2005-04-01	62.0032550
2005-05-01	62.3115141
2005-06-01	62.1931547
2005-07-01	62.2559778
2005-08-01	60.9631335
2005-09-01	62.0918997
2005-10-01	61.9223144
2005-11-01	62.3502419
2005-12-01	65.0782498
2006-01-01	64.0903796
2006-02-01	62.6537385
2006-03-01	62.3440307
2006-04-01	62.2253239
2006-05-01	62.4395656
2006-06-01	62.7191613
2006-07-01	63.6975561
2006-08-01	61.6650443
2006-09-01	63.0824193
2006-10-01	62.5033400
2006-11-01	61.7071636
2006-12-01	65.7070887
2007-01-01	64.0420744
2007-02-01	63.5414899
2007-03-01	62.5561698
2007-04-01	63.5704676
2007-05-01	63.5763931
2007-06-01	62.3708809
2007-07-01	62.5447658
2007-08-01	61.5215664
2007-09-01	63.3293083
2007-10-01	63.2084569
2007-11-01	62.3056464
2007-12-01	66.3597643
2008-01-01	65.4109338
2008-02-01	63.9701714
2008-03-01	63.8966296
2008-04-01	64.2908098
2008-05-01	63.3376098
2008-06-01	63.4433017
2008-07-01	63.4148970
2008-08-01	62.2025477
2008-09-01	63.1565763
2008-10-01	62.7175633
2008-11-01	61.5624392
2008-12-01	64.5907272
2009-01-01	62.7454422
2009-02-01	61.6030926
2009-03-01	61.0532756
2009-04-01	60.6362918
2009-05-01	59.8137069
2009-06-01	59.4215328
2009-07-01	59.9416009
2009-08-01	58.2618969
2009-09-01	60.0747854
2009-10-01	60.9995766
2009-11-01	60.5692934
2009-12-01	63.5199055
2010-01-01	61.3534303
2010-02-01	60.4995740
2010-03-01	60.2175183
2010-04-01	59.6793713
2010-05-01	59.8562513
2010-06-01	59.0317720
2010-07-01	59.4437389
2010-08-01	57.5237752
2010-09-01	58.8905629
2010-10-01	58.6620117
2010-11-01	58.6889129
2010-12-01	62.7265153
2011-01-01	61.1748576
2011-02-01	60.8625063
2011-03-01	60.4564718
2011-04-01	60.4900323
2011-05-01	59.9545342
2011-06-01	59.7826277
2011-07-01	59.7435127
2011-08-01	59.3924231
2011-09-01	60.8769619
2011-10-01	61.0044615
2011-11-01	58.9649111
2011-12-01	59.6448928
2012-01-01	60.3937761
2012-02-01	60.0084706
2012-03-01	59.8279285
2012-04-01	60.1067869
2012-05-01	60.2511140
2012-06-01	59.4730742
2012-07-01	59.0781248
2012-08-01	57.0435106
2012-09-01	58.9379528
2012-10-01	58.5050542
2012-11-01	58.2287093
2012-12-01	61.7224418
2013-01-01	60.6176421
2013-02-01	58.3350822
2013-03-01	58.6188793
2013-04-01	59.5439992
2013-05-01	59.0103826
2013-06-01	58.2831551
2013-07-01	59.1445986
2013-08-01	57.3644963
2013-09-01	58.6123036
2013-10-01	57.9866947
2013-11-01	57.7565054
2013-12-01	59.6016649
2014-01-01	59.6485784
2014-02-01	57.2029919
2014-03-01	58.0237599
2014-04-01	57.8906314
2014-05-01	58.0450195
2014-06-01	57.8875024
2014-07-01	58.2450935
2014-08-01	57.6065694
2014-09-01	57.0321274
2014-10-01	57.1873806
2014-11-01	56.9923754
2014-12-01	60.1454926
2015-01-01	57.8472679
2015-02-01	58.4254092
2015-03-01	57.6358080
2015-04-01	58.8215617
2015-05-01	58.4607837
2015-06-01	58.7172913
2015-07-01	59.2386988
2015-08-01	57.0737874
2015-09-01	58.0690732
2015-10-01	58.7228370
2015-11-01	59.9229471
2015-12-01	62.3704296
2016-01-01	59.6683891
2016-02-01	60.2438742
2016-03-01	58.7037339
2016-04-01	59.6513908
2016-05-01	59.1454677
2016-06-01	59.2656274
2016-07-01	58.3610685
2016-08-01	56.8341278
2016-09-01	57.5923195
2016-10-01	58.1880741
2016-11-01	57.5282243
2016-12-01	60.3366836
2017-01-01	60.1371438
2017-02-01	58.2754697
2017-03-01	57.2403012
2017-04-01	57.1422795
2017-05-01	57.8859447
2017-06-01	57.9925781
2017-07-01	58.3140208
2017-08-01	57.7112705
2017-09-01	59.3627582
2017-10-01	58.9447087
2017-11-01	59.3048520
2017-12-01	62.4096490
2018-01-01	60.8131531
2018-02-01	59.9099762
2018-03-01	59.6195101
2018-04-01	59.7332932
2018-05-01	61.1971207
2018-06-01	61.5635330
2018-07-01	60.1191489
2018-08-01	59.0844136
2018-09-01	59.1322732