Month	Percent
1978-02-01	45.5966417
1978-03-01	46.4464093
1978-04-01	46.7313100
1978-05-01	46.5844228
1978-06-01	46.4494994
1978-07-01	46.8454435
1978-08-01	46.4993815
1978-09-01	46.6345027
1978-10-01	46.7232882
1978-11-01	46.6343171
1978-12-01	47.0276222
1979-01-01	44.7877591
1979-02-01	45.9680969
1979-03-01	46.6257474
1979-04-01	46.3843821
1979-05-01	46.0656557
1979-06-01	46.2690045
1979-07-01	46.3879765
1979-08-01	45.9061308
1979-09-01	46.7604910
1979-10-01	46.9894617
1979-11-01	47.4750665
1979-12-01	47.5871142
1980-01-01	45.6422776
1980-02-01	47.1489003
1980-03-01	48.3032610
1980-04-01	47.5814723
1980-05-01	47.8456808
1980-06-01	47.8521969
1980-07-01	48.4890267
1980-08-01	48.0431042
1980-09-01	48.7755571
1980-10-01	48.1051599
1980-11-01	48.4186153
1980-12-01	48.5423494
1981-01-01	46.1919819
1981-02-01	47.5108031
1981-03-01	48.3604167
1981-04-01	48.4267546
1981-05-01	48.1984963
1981-06-01	48.2237466
1981-07-01	48.2811841
1981-08-01	47.9532418
1981-09-01	49.2845130
1981-10-01	48.7659636
1981-11-01	48.6263430
1981-12-01	48.8596546
1982-01-01	46.5903050
1982-02-01	47.5604205
1982-03-01	48.6314217
1982-04-01	47.8200566
1982-05-01	47.8277712
1982-06-01	47.4660404
1982-07-01	47.6548228
1982-08-01	47.4406669
1982-09-01	47.8524110
1982-10-01	47.6832829
1982-11-01	47.5092766
1982-12-01	47.4819453
1983-01-01	45.0063273
1983-02-01	46.2281101
1983-03-01	47.1894380
1983-04-01	46.3742790
1983-05-01	46.6885076
1983-06-01	46.5109367
1983-07-01	46.8788899
1983-08-01	46.3639700
1983-09-01	47.2603801
1983-10-01	47.0194891
1983-11-01	47.6762124
1983-12-01	47.9566642
1984-01-01	45.4222862
1984-02-01	46.5812240
1984-03-01	48.2043620
1984-04-01	47.9646321
1984-05-01	48.0697546
1984-06-01	48.0482286
1984-07-01	48.1507224
1984-08-01	47.8013725
1984-09-01	49.0256818
1984-10-01	48.6024594
1984-11-01	48.9006108
1984-12-01	49.3646476
1985-01-01	46.8650839
1985-02-01	48.6814772
1985-03-01	49.6005091
1985-04-01	48.6209355
1985-05-01	49.3892944
1985-06-01	49.4543849
1985-07-01	49.8565120
1985-08-01	49.3628503
1985-09-01	50.3530478
1985-10-01	50.0388958
1985-11-01	51.0946458
1985-12-01	51.2941525
1986-01-01	49.0101888
1986-02-01	50.5951705
1986-03-01	51.7595258
1986-04-01	52.2230520
1986-05-01	52.1888339
1986-06-01	52.0858292
1986-07-01	52.2434009
1986-08-01	51.3425009
1986-09-01	52.4312264
1986-10-01	52.4227835
1986-11-01	52.7314444
1986-12-01	53.0294240
1987-01-01	50.3670284
1987-02-01	51.8388249
1987-03-01	52.9850076
1987-04-01	52.6681314
1987-05-01	52.7528917
1987-06-01	52.7218921
1987-07-01	52.9448920
1987-08-01	52.1166485
1987-09-01	53.1547348
1987-10-01	53.0410747
1987-11-01	53.1700673
1987-12-01	54.0598425
1988-01-01	51.9296523
1988-02-01	52.8551249
1988-03-01	54.3975640
1988-04-01	54.1421490
1988-05-01	54.0820855
1988-06-01	53.9847502
1988-07-01	53.8930385
1988-08-01	54.0143942
1988-09-01	55.2898669
1988-10-01	54.6498202
1988-11-01	55.0422107
1988-12-01	55.8326204
1989-01-01	53.6167959
1989-02-01	55.0932986
1989-03-01	55.9691854
1989-04-01	56.1371343
1989-05-01	56.6722887
1989-06-01	56.4346030
1989-07-01	56.4509784
1989-08-01	56.3961074
1989-09-01	57.5827336
1989-10-01	56.8556447
1989-11-01	57.6164313
1989-12-01	58.1643362
1990-01-01	55.5866082
1990-02-01	56.8339014
1990-03-01	57.7388121
1990-04-01	57.7307470
1990-05-01	57.9657027
1990-06-01	57.7354162
1990-07-01	57.8561866
1990-08-01	57.0696675
1990-09-01	57.7307110
1990-10-01	57.0783036
1990-11-01	57.3193095
1990-12-01	57.8510397
1991-01-01	54.9787772
1991-02-01	55.9839062
1991-03-01	56.3924731
1991-04-01	56.5136366
1991-05-01	56.4792842
1991-06-01	56.1301981
1991-07-01	55.3685501
1991-08-01	55.9086369
1991-09-01	56.5545852
1991-10-01	55.5680868
1991-11-01	55.4491401
1991-12-01	56.2243161
1992-01-01	54.1564962
1992-02-01	55.1446077
1992-03-01	55.7274894
1992-04-01	55.6188284
1992-05-01	55.5943046
1992-06-01	55.6727954
1992-07-01	55.8176824
1992-08-01	55.5365911
1992-09-01	56.4327193
1992-10-01	55.7876806
1992-11-01	55.5689552
1992-12-01	56.1301237
1993-01-01	54.3038050
1993-02-01	54.6070267
1993-03-01	55.5541267
1993-04-01	54.9436996
1993-05-01	55.3902583
1993-06-01	55.2002430
1993-07-01	55.1465074
1993-08-01	55.0004071
1993-09-01	56.2628563
1993-10-01	56.0043143
1993-11-01	56.1726073
1993-12-01	56.6990994
1994-01-01	54.4769094
1994-02-01	55.7136299
1994-03-01	56.5813772
1994-04-01	56.3644046
1994-05-01	56.7064282
1994-06-01	56.6881919
1994-07-01	57.3211251
1994-08-01	56.4277026
1994-09-01	58.4200836
1994-10-01	57.3911062
1994-11-01	57.7269059
1994-12-01	58.4908512
1995-01-01	56.2260663
1995-02-01	57.3422705
1995-03-01	58.2905978
1995-04-01	58.7292311
1995-05-01	58.9054321
1995-06-01	59.2688167
1995-07-01	59.2297427
1995-08-01	58.6360042
1995-09-01	59.6656110
1995-10-01	59.1271819
1995-11-01	59.7529500
1995-12-01	60.3134751
1996-01-01	57.9767555
1996-02-01	58.6480648
1996-03-01	59.3243291
1996-04-01	58.6385043
1996-05-01	59.0296119
1996-06-01	59.0502981
1996-07-01	59.0994496
1996-08-01	58.6787693
1996-09-01	59.5105679
1996-10-01	58.9555368
1996-11-01	58.8969549
1996-12-01	59.7058790
1997-01-01	57.5526386
1997-02-01	58.4901939
1997-03-01	58.9414128
1997-04-01	58.8558882
1997-05-01	58.7269664
1997-06-01	58.7104826
1997-07-01	58.9927597
1997-08-01	57.8877210
1997-09-01	59.9318104
1997-10-01	58.8808394
1997-11-01	59.4145855
1997-12-01	59.7192361
1998-01-01	57.4675253
1998-02-01	58.5071247
1998-03-01	58.9897363
1998-04-01	59.2305381
1998-05-01	59.2298865
1998-06-01	59.6129193
1998-07-01	59.7791715
1998-08-01	59.2030622
1998-09-01	60.5333510
1998-10-01	59.9975725
1998-11-01	59.6167842
1998-12-01	60.6680639
1999-01-01	58.2569264
1999-02-01	59.0159480
1999-03-01	59.4313802
1999-04-01	59.6316408
1999-05-01	59.4963106
1999-06-01	59.7990033
1999-07-01	60.0878918
1999-08-01	59.1749074
1999-09-01	60.7804449
1999-10-01	60.4115742
1999-11-01	60.6151932
1999-12-01	61.5232416
2000-01-01	58.8302492
2000-02-01	59.8859502
2000-03-01	60.7556385
2000-04-01	61.1575421
2000-05-01	61.0666986
2000-06-01	61.6086540
2000-07-01	62.3039848
2000-08-01	61.7524621
2000-09-01	62.7069074
2000-10-01	61.7020300
2000-11-01	61.2212657
2000-12-01	62.1994598
2001-01-01	60.1159404
2001-02-01	61.0489199
2001-03-01	61.5239847
2001-04-01	62.1117749
2001-05-01	61.8427572
2001-06-01	62.0063927
2001-07-01	61.8113420
2001-08-01	61.3642003
2001-09-01	62.2450682
2001-10-01	61.6695502
2001-11-01	61.8164205
2001-12-01	62.2761478
2002-01-01	60.7124064
2002-02-01	61.4598616
2002-03-01	61.7492363
2002-04-01	61.5755461
2002-05-01	61.5471068
2002-06-01	61.8122723
2002-07-01	61.8914289
2002-08-01	61.8360441
2002-09-01	63.0025068
2002-10-01	62.3810187
2002-11-01	62.8196309
2002-12-01	63.6673735
2003-01-01	62.3548875
2003-02-01	63.1858422
2003-03-01	62.8595513
2003-04-01	63.0960804
2003-05-01	63.2852171
2003-06-01	63.1619956
2003-07-01	62.7467785
2003-08-01	62.4288618
2003-09-01	63.5649723
2003-10-01	62.9295535
2003-11-01	62.8099946
2003-12-01	63.3268572
2004-01-01	61.4772909
2004-02-01	62.0856049
2004-03-01	62.8147374
2004-04-01	62.7570113
2004-05-01	62.9998476
2004-06-01	62.9097190
2004-07-01	62.8629344
2004-08-01	62.4554253
2004-09-01	63.8252669
2004-10-01	63.6452175
2004-11-01	63.6388875
2004-12-01	64.5901351
2005-01-01	62.9704490
2005-02-01	63.7796741
2005-03-01	64.4079456
2005-04-01	64.3639541
2005-05-01	64.5967769
2005-06-01	64.8249021
2005-07-01	64.7011828
2005-08-01	64.4840135
2005-09-01	65.4529083
2005-10-01	64.9471067
2005-11-01	64.9810304
2005-12-01	65.6276894
2006-01-01	63.8493239
2006-02-01	64.4359551
2006-03-01	65.1091199
2006-04-01	64.9095668
2006-05-01	65.6135625
2006-06-01	65.6605840
2006-07-01	65.6977778
2006-08-01	65.2802401
2006-09-01	66.6775077
2006-10-01	65.6595116
2006-11-01	65.6885938
2006-12-01	66.7597254
2007-01-01	64.7712761
2007-02-01	65.4327454
2007-03-01	65.7657055
2007-04-01	65.7157104
2007-05-01	66.1060204
2007-06-01	65.9632687
2007-07-01	65.9268866
2007-08-01	65.6880783
2007-09-01	66.9874280
2007-10-01	66.4157236
2007-11-01	66.4169674
2007-12-01	67.5368357
2008-01-01	65.6093072
2008-02-01	66.4088215
2008-03-01	66.6753179
2008-04-01	66.9135880
2008-05-01	66.7488358
2008-06-01	66.8723038
2008-07-01	66.7365775
2008-08-01	66.5021972
2008-09-01	67.2383495
2008-10-01	66.8192280
2008-11-01	66.5854732
2008-12-01	67.5069556
2009-01-01	65.8824238
2009-02-01	66.6064899
2009-03-01	66.5430876
2009-04-01	66.4947254
2009-05-01	66.6715214
2009-06-01	66.3416419
2009-07-01	66.2623599
2009-08-01	65.3531192
2009-09-01	66.3987409
2009-10-01	66.1226320
2009-11-01	66.0657656
2009-12-01	66.8857538
2010-01-01	65.1754399
2010-02-01	65.6034215
2010-03-01	65.9238176
2010-04-01	65.6893244
2010-05-01	65.9820886
2010-06-01	66.1587539
2010-07-01	66.1362270
2010-08-01	65.8153768
2010-09-01	66.9261982
2010-10-01	66.5533102
2010-11-01	66.4489709
2010-12-01	67.3399025
2011-01-01	65.5241937
2011-02-01	66.2365267
2011-03-01	66.7431427
2011-04-01	66.6113630
2011-05-01	66.6172476
2011-06-01	66.8980531
2011-07-01	66.8163004
2011-08-01	66.3665181
2011-09-01	67.4461223
2011-10-01	66.9949987
2011-11-01	66.6554725
2011-12-01	66.9031713
2012-01-01	65.4909244
2012-02-01	66.1362824
2012-03-01	66.8792399
2012-04-01	66.5757080
2012-05-01	66.9552178
2012-06-01	66.5521890
2012-07-01	66.6883727
2012-08-01	66.0103895
2012-09-01	67.3964742
2012-10-01	66.5697820
2012-11-01	66.5147890
2012-12-01	67.0671786
2013-01-01	65.6694774
2013-02-01	66.3951705
2013-03-01	66.5693416
2013-04-01	66.7856981
2013-05-01	66.4995875
2013-06-01	66.6202949
2013-07-01	66.2798561
2013-08-01	65.8808111
2013-09-01	66.9336536
2013-10-01	66.5171845
2013-11-01	66.2837859
2013-12-01	66.6013786
2014-01-01	65.0838009
2014-02-01	65.6195531
2014-03-01	66.2320768
2014-04-01	66.1629364
2014-05-01	66.3307020
2014-06-01	66.3135124
2014-07-01	66.1959717
2014-08-01	66.3644020
2014-09-01	65.9789182
2014-10-01	66.0337863
2014-11-01	65.9495767
2014-12-01	66.9643222
2015-01-01	65.0777741
2015-02-01	66.6014503
2015-03-01	66.2855077
2015-04-01	66.5882406
2015-05-01	66.9964047
2015-06-01	66.8762107
2015-07-01	66.7892253
2015-08-01	66.5121713
2015-09-01	66.8768062
2015-10-01	67.3612250
2015-11-01	67.8575645
2015-12-01	68.2266297
2016-01-01	66.2188493
2016-02-01	67.6239986
2016-03-01	67.3771920
2016-04-01	67.5377380
2016-05-01	67.6281934
2016-06-01	67.6253238
2016-07-01	67.4323963
2016-08-01	66.8893532
2016-09-01	67.2992354
2016-10-01	67.2694664
2016-11-01	67.7129242
2016-12-01	68.1271555
2017-01-01	66.4416767
2017-02-01	67.2842149
2017-03-01	67.4257843
2017-04-01	67.6007764
2017-05-01	68.2108105
2017-06-01	68.2998406
2017-07-01	68.0531405
2017-08-01	68.1042744
2017-09-01	68.6227511
2017-10-01	68.6153487
2017-11-01	69.2102462
2017-12-01	69.9106920
2018-01-01	67.9513259
2018-02-01	69.1394531
2018-03-01	68.9591126
2018-04-01	69.0180282
2018-05-01	69.4088386
2018-06-01	69.6563887
2018-07-01	69.0984500
2018-08-01	68.8951589
2018-09-01	69.1133176