Month	Percent
1978-02-01	39.4728950
1978-03-01	40.1801594
1978-04-01	40.4243953
1978-05-01	40.2750223
1978-06-01	40.1810602
1978-07-01	40.4784078
1978-08-01	40.1973570
1978-09-01	40.3112394
1978-10-01	40.4082613
1978-11-01	40.3214812
1978-12-01	40.6092864
1979-01-01	38.6602475
1979-02-01	39.6276175
1979-03-01	40.1835073
1979-04-01	39.9562587
1979-05-01	39.6444516
1979-06-01	39.8463070
1979-07-01	39.9535696
1979-08-01	39.5536777
1979-09-01	40.2835835
1979-10-01	40.5219915
1979-11-01	40.9152246
1979-12-01	40.9925906
1980-01-01	39.3274785
1980-02-01	40.5967080
1980-03-01	41.6166227
1980-04-01	40.9891765
1980-05-01	41.1977872
1980-06-01	41.2654205
1980-07-01	41.8044446
1980-08-01	41.3771825
1980-09-01	42.0239701
1980-10-01	41.3867102
1980-11-01	41.6227414
1980-12-01	41.7115972
1981-01-01	39.6804235
1981-02-01	40.8278898
1981-03-01	41.5707785
1981-04-01	41.6173339
1981-05-01	41.3958271
1981-06-01	41.3940906
1981-07-01	41.4613626
1981-08-01	41.1924403
1981-09-01	42.3108883
1981-10-01	41.8676250
1981-11-01	41.7615441
1981-12-01	41.9497400
1982-01-01	39.9349793
1982-02-01	40.8178371
1982-03-01	41.7208787
1982-04-01	41.0151359
1982-05-01	41.0305194
1982-06-01	40.7186562
1982-07-01	40.8746557
1982-08-01	40.6911447
1982-09-01	41.0234557
1982-10-01	40.8618621
1982-11-01	40.6810726
1982-12-01	40.6626979
1983-01-01	38.5579309
1983-02-01	39.5959818
1983-03-01	40.4453138
1983-04-01	39.7114259
1983-05-01	39.9720668
1983-06-01	39.8509288
1983-07-01	40.1302200
1983-08-01	39.6620586
1983-09-01	40.4369131
1983-10-01	40.2349207
1983-11-01	40.7440163
1983-12-01	40.9864263
1984-01-01	38.7785234
1984-02-01	39.7824451
1984-03-01	41.1715690
1984-04-01	40.9532295
1984-05-01	41.0395556
1984-06-01	41.0768375
1984-07-01	41.1186255
1984-08-01	40.8646679
1984-09-01	41.8988008
1984-10-01	41.5058735
1984-11-01	41.7285176
1984-12-01	42.1154967
1985-01-01	39.9562867
1985-02-01	41.4858764
1985-03-01	42.2600188
1985-04-01	41.4166729
1985-05-01	42.0655155
1985-06-01	42.1018947
1985-07-01	42.4565241
1985-08-01	42.0296945
1985-09-01	42.9609645
1985-10-01	42.6278832
1985-11-01	43.5640984
1985-12-01	43.6990607
1986-01-01	41.7507269
1986-02-01	43.0754960
1986-03-01	44.0837565
1986-04-01	44.5258622
1986-05-01	44.3748875
1986-06-01	44.2844571
1986-07-01	44.4269972
1986-08-01	43.5907429
1986-09-01	44.5503174
1986-10-01	44.5472704
1986-11-01	44.7966585
1986-12-01	45.0262559
1987-01-01	42.8080907
1987-02-01	44.0511698
1987-03-01	45.0411408
1987-04-01	44.7506688
1987-05-01	44.7632247
1987-06-01	44.7484560
1987-07-01	44.9598660
1987-08-01	44.2534808
1987-09-01	45.1037003
1987-10-01	45.0246723
1987-11-01	45.1618278
1987-12-01	45.8880523
1988-01-01	44.0600478
1988-02-01	44.8621662
1988-03-01	46.2166576
1988-04-01	45.9681963
1988-05-01	45.8170772
1988-06-01	45.7230292
1988-07-01	45.6455661
1988-08-01	45.7615994
1988-09-01	46.8371499
1988-10-01	46.2917494
1988-11-01	46.5735123
1988-12-01	47.2852832
1989-01-01	45.3970953
1989-02-01	46.6344034
1989-03-01	47.3424474
1989-04-01	47.4526089
1989-05-01	47.9377943
1989-06-01	47.7385590
1989-07-01	47.7815382
1989-08-01	47.6991472
1989-09-01	48.6976504
1989-10-01	48.0866257
1989-11-01	48.6874256
1989-12-01	49.1631132
1990-01-01	46.9713035
1990-02-01	47.9965824
1990-03-01	48.7590289
1990-04-01	48.7701602
1990-05-01	48.9711089
1990-06-01	48.7987759
1990-07-01	48.9308936
1990-08-01	48.2073691
1990-09-01	48.8220137
1990-10-01	48.2844567
1990-11-01	48.4644066
1990-12-01	48.8615860
1991-01-01	46.4354647
1991-02-01	47.2647343
1991-03-01	47.6127999
1991-04-01	47.7343446
1991-05-01	47.6303273
1991-06-01	47.3583262
1991-07-01	46.6574271
1991-08-01	47.1487763
1991-09-01	47.7511544
1991-10-01	46.8966818
1991-11-01	46.7771829
1991-12-01	47.4080956
1992-01-01	45.6431442
1992-02-01	46.4661457
1992-03-01	46.9546225
1992-04-01	46.8154648
1992-05-01	46.8112180
1992-06-01	46.8374169
1992-07-01	46.9779536
1992-08-01	46.7080118
1992-09-01	47.4641729
1992-10-01	46.9070968
1992-11-01	46.7220916
1992-12-01	47.0891513
1993-01-01	45.5533323
1993-02-01	45.8025400
1993-03-01	46.6509894
1993-04-01	46.0749459
1993-05-01	46.4758267
1993-06-01	46.3398538
1993-07-01	46.2780923
1993-08-01	46.1728755
1993-09-01	47.2670821
1993-10-01	47.0164616
1993-11-01	47.1581201
1993-12-01	47.5886099
1994-01-01	45.7333565
1994-02-01	46.7436264
1994-03-01	47.4732664
1994-04-01	47.2684362
1994-05-01	47.5558289
1994-06-01	47.5370591
1994-07-01	48.0478724
1994-08-01	47.2876812
1994-09-01	48.9540304
1994-10-01	48.0775148
1994-11-01	48.3796268
1994-12-01	48.9837496
1995-01-01	47.1174549
1995-02-01	48.0316582
1995-03-01	48.8168181
1995-04-01	49.2190108
1995-05-01	49.3372579
1995-06-01	49.6399938
1995-07-01	49.6595423
1995-08-01	49.1080451
1995-09-01	49.9975103
1995-10-01	49.5446051
1995-11-01	50.0551813
1995-12-01	50.5155447
1996-01-01	48.5353619
1996-02-01	49.0690537
1996-03-01	49.6680794
1996-04-01	49.0812254
1996-05-01	49.4277006
1996-06-01	49.4566669
1996-07-01	49.4718860
1996-08-01	49.1175254
1996-09-01	49.8564163
1996-10-01	49.3657498
1996-11-01	49.3269779
1996-12-01	49.9409660
1997-01-01	48.1276786
1997-02-01	48.9666537
1997-03-01	49.3429646
1997-04-01	49.2530273
1997-05-01	49.1561647
1997-06-01	49.1400819
1997-07-01	49.3837941
1997-08-01	48.4338259
1997-09-01	50.2018561
1997-10-01	49.2834790
1997-11-01	49.7657895
1997-12-01	50.0181060
1998-01-01	48.0943660
1998-02-01	48.9474124
1998-03-01	49.3778964
1998-04-01	49.6163934
1998-05-01	49.5519565
1998-06-01	49.8812461
1998-07-01	50.0398938
1998-08-01	49.5481423
1998-09-01	50.6678136
1998-10-01	50.1675553
1998-11-01	49.8373682
1998-12-01	50.7350246
1999-01-01	48.7206362
1999-02-01	49.3633090
1999-03-01	49.6774505
1999-04-01	49.8409499
1999-05-01	49.7260190
1999-06-01	50.0135175
1999-07-01	50.2167419
1999-08-01	49.4502090
1999-09-01	50.8502281
1999-10-01	50.5826594
1999-11-01	50.7373704
1999-12-01	51.4880262
2000-01-01	49.1935534
2000-02-01	50.1002251
2000-03-01	50.8282771
2000-04-01	51.1262846
2000-05-01	51.0548512
2000-06-01	51.4765971
2000-07-01	52.0459856
2000-08-01	51.5614317
2000-09-01	52.3987869
2000-10-01	51.5503618
2000-11-01	51.1431300
2000-12-01	51.9466065
2001-01-01	50.2380812
2001-02-01	51.0085394
2001-03-01	51.4206182
2001-04-01	51.8597750
2001-05-01	51.6343129
2001-06-01	51.7661643
2001-07-01	51.6490836
2001-08-01	51.2267136
2001-09-01	52.0129799
2001-10-01	51.5122250
2001-11-01	51.6398421
2001-12-01	52.0378781
2002-01-01	50.7146372
2002-02-01	51.3741479
2002-03-01	51.6287872
2002-04-01	51.4610040
2002-05-01	51.4351792
2002-06-01	51.6624546
2002-07-01	51.6886241
2002-08-01	51.6234704
2002-09-01	52.6672579
2002-10-01	52.1157471
2002-11-01	52.4496484
2002-12-01	53.2045320
2003-01-01	52.1065194
2003-02-01	52.7630100
2003-03-01	52.4940160
2003-04-01	52.6979860
2003-05-01	52.8470856
2003-06-01	52.7357744
2003-07-01	52.3833136
2003-08-01	52.0737694
2003-09-01	53.0510878
2003-10-01	52.4727954
2003-11-01	52.3952655
2003-12-01	52.8350913
2004-01-01	51.2424527
2004-02-01	51.7899263
2004-03-01	52.4224360
2004-04-01	52.3916363
2004-05-01	52.5521640
2004-06-01	52.5415326
2004-07-01	52.4651469
2004-08-01	52.1629940
2004-09-01	53.3576332
2004-10-01	53.1887940
2004-11-01	53.1818206
2004-12-01	53.9360488
2005-01-01	52.5818380
2005-02-01	53.3202286
2005-03-01	53.8646442
2005-04-01	53.8171859
2005-05-01	53.9644291
2005-06-01	54.1570061
2005-07-01	54.0860389
2005-08-01	53.8900882
2005-09-01	54.7499295
2005-10-01	54.2903090
2005-11-01	54.3436044
2005-12-01	54.8652812
2006-01-01	53.3003186
2006-02-01	53.8482768
2006-03-01	54.3756974
2006-04-01	54.2417733
2006-05-01	54.7984548
2006-06-01	54.8769299
2006-07-01	54.8907559
2006-08-01	54.5703023
2006-09-01	55.7685518
2006-10-01	54.8857955
2006-11-01	54.9099279
2006-12-01	55.7704887
2007-01-01	54.1049096
2007-02-01	54.7250097
2007-03-01	55.0215026
2007-04-01	54.9305557
2007-05-01	55.3155528
2007-06-01	55.2461444
2007-07-01	55.1858599
2007-08-01	54.9957530
2007-09-01	56.1387095
2007-10-01	55.6468466
2007-11-01	55.6571008
2007-12-01	56.5051240
2008-01-01	54.9037075
2008-02-01	55.5362247
2008-03-01	55.9051305
2008-04-01	56.0670396
2008-05-01	55.8794047
2008-06-01	55.9774571
2008-07-01	55.9366131
2008-08-01	55.6997137
2008-09-01	56.3834943
2008-10-01	55.9227302
2008-11-01	55.7297242
2008-12-01	56.5121047
2009-01-01	55.1162566
2009-02-01	55.7814064
2009-03-01	55.7350376
2009-04-01	55.7220126
2009-05-01	55.8388406
2009-06-01	55.6375578
2009-07-01	55.5505853
2009-08-01	54.8403720
2009-09-01	55.7486389
2009-10-01	55.4345618
2009-11-01	55.4019637
2009-12-01	56.0716115
2010-01-01	54.5770840
2010-02-01	54.9974181
2010-03-01	55.3196136
2010-04-01	55.1261371
2010-05-01	55.3305028
2010-06-01	55.5235180
2010-07-01	55.4577178
2010-08-01	55.0968846
2010-09-01	56.0892089
2010-10-01	55.7909309
2010-11-01	55.8161420
2010-12-01	56.4077479
2011-01-01	54.8436384
2011-02-01	55.4003488
2011-03-01	55.8852114
2011-04-01	55.7465908
2011-05-01	55.7379695
2011-06-01	55.9801759
2011-07-01	55.8212375
2011-08-01	55.3725190
2011-09-01	56.4226071
2011-10-01	56.0286027
2011-11-01	55.6991126
2011-12-01	55.9563834
2012-01-01	54.6744428
2012-02-01	55.2167625
2012-03-01	55.9440745
2012-04-01	55.6262668
2012-05-01	56.0358785
2012-06-01	55.6784855
2012-07-01	55.7219135
2012-08-01	55.1860868
2012-09-01	56.3816893
2012-10-01	55.6608199
2012-11-01	55.5878011
2012-12-01	55.9730269
2013-01-01	54.7592995
2013-02-01	55.4383229
2013-03-01	55.5637833
2013-04-01	55.7263131
2013-05-01	55.5674964
2013-06-01	55.5665784
2013-07-01	55.3948026
2013-08-01	54.8604129
2013-09-01	55.8033566
2013-10-01	55.4225029
2013-11-01	55.1791972
2013-12-01	55.4841492
2014-01-01	54.1355058
2014-02-01	54.6683987
2014-03-01	55.1740543
2014-04-01	55.1838234
2014-05-01	55.2761136
2014-06-01	55.2739303
2014-07-01	55.1181792
2014-08-01	55.3526889
2014-09-01	54.9837011
2014-10-01	54.9349891
2014-11-01	54.8851512
2014-12-01	55.5729499
2015-01-01	54.0841381
2015-02-01	55.3438873
2015-03-01	55.0867074
2015-04-01	55.2124626
2015-05-01	55.6298890
2015-06-01	55.5521620
2015-07-01	55.4773697
2015-08-01	55.3036427
2015-09-01	55.5812064
2015-10-01	55.9902578
2015-11-01	56.4659128
2015-12-01	56.6823356
2016-01-01	54.9795068
2016-02-01	56.1612086
2016-03-01	55.9485353
2016-04-01	56.0949033
2016-05-01	56.1411812
2016-06-01	56.1334470
2016-07-01	56.0212839
2016-08-01	55.4939404
2016-09-01	55.7477935
2016-10-01	55.7611598
2016-11-01	56.1437071
2016-12-01	56.4298799
2017-01-01	54.9915944
2017-02-01	55.8145592
2017-03-01	55.9183192
2017-04-01	55.9514401
2017-05-01	56.5181337
2017-06-01	56.5911561
2017-07-01	56.3976785
2017-08-01	56.4207135
2017-09-01	56.8118834
2017-10-01	56.8092164
2017-11-01	57.3173267
2017-12-01	57.9437045
2018-01-01	56.2196101
2018-02-01	57.2867445
2018-03-01	57.1452005
2018-04-01	57.1712365
2018-05-01	57.4421447
2018-06-01	57.6628563
2018-07-01	57.1575703
2018-08-01	56.9434038
2018-09-01	57.1660043