Month	Percent
1978-02-01	80.0952688
1978-03-01	79.5018278
1978-04-01	79.2489085
1978-05-01	78.9350264
1978-06-01	78.8806934
1978-07-01	78.4463906
1978-08-01	78.1668141
1978-09-01	78.1722566
1978-10-01	78.1650106
1978-11-01	77.8340886
1978-12-01	79.7839889
1979-01-01	78.8482854
1979-02-01	79.0201791
1979-03-01	78.7365719
1979-04-01	78.5769924
1979-05-01	78.3708525
1979-06-01	78.2582926
1979-07-01	78.1023411
1979-08-01	77.7653532
1979-09-01	78.4313567
1979-10-01	78.0461109
1979-11-01	77.6969065
1979-12-01	79.4679455
1980-01-01	78.6710657
1980-02-01	78.7391602
1980-03-01	78.4791852
1980-04-01	77.8798578
1980-05-01	78.6248947
1980-06-01	78.0988914
1980-07-01	78.1286096
1980-08-01	77.8450163
1980-09-01	78.4660448
1980-10-01	77.8961455
1980-11-01	77.6180334
1980-12-01	79.6488346
1981-01-01	78.4953374
1981-02-01	78.7422984
1981-03-01	78.7324251
1981-04-01	78.2156632
1981-05-01	78.1061981
1981-06-01	77.7363011
1981-07-01	77.9401664
1981-08-01	77.4960775
1981-09-01	78.2925956
1981-10-01	77.3224662
1981-11-01	77.0100243
1981-12-01	78.5121548
1982-01-01	77.7427208
1982-02-01	78.2341113
1982-03-01	77.9997302
1982-04-01	77.1471616
1982-05-01	77.3317293
1982-06-01	76.9782540
1982-07-01	77.0801800
1982-08-01	76.5698029
1982-09-01	77.5854897
1982-10-01	77.4511269
1982-11-01	76.8806504
1982-12-01	78.1768131
1983-01-01	77.1042715
1983-02-01	77.6349998
1983-03-01	77.2533072
1983-04-01	76.7513178
1983-05-01	76.7175377
1983-06-01	76.3555098
1983-07-01	76.4753700
1983-08-01	75.8558507
1983-09-01	77.0218587
1983-10-01	76.0930899
1983-11-01	75.8790279
1983-12-01	77.4417998
1984-01-01	76.4730843
1984-02-01	76.9522729
1984-03-01	77.1990909
1984-04-01	76.4788267
1984-05-01	76.3604505
1984-06-01	76.1862384
1984-07-01	76.1931140
1984-08-01	75.6130891
1984-09-01	76.2517551
1984-10-01	75.5720864
1984-11-01	75.3877072
1984-12-01	76.4121072
1985-01-01	75.8151540
1985-02-01	76.2368959
1985-03-01	76.2789923
1985-04-01	75.3048371
1985-05-01	75.6733670
1985-06-01	75.5331887
1985-07-01	75.3613403
1985-08-01	75.2173240
1985-09-01	76.3031176
1985-10-01	75.1489400
1985-11-01	75.8285144
1985-12-01	76.3687645
1986-01-01	76.0866688
1986-02-01	76.2838909
1986-03-01	76.4180783
1986-04-01	76.1225254
1986-05-01	75.7279799
1986-06-01	75.8115216
1986-07-01	75.5450482
1986-08-01	75.0975933
1986-09-01	76.1471217
1986-10-01	75.4105188
1986-11-01	75.0677048
1986-12-01	76.6332772
1987-01-01	75.4468908
1987-02-01	75.7955103
1987-03-01	76.2030013
1987-04-01	75.4409471
1987-05-01	75.2800172
1987-06-01	75.2805681
1987-07-01	75.6364504
1987-08-01	74.7089404
1987-09-01	75.1384949
1987-10-01	74.7893609
1987-11-01	74.3061265
1987-12-01	76.0891389
1988-01-01	75.4623207
1988-02-01	75.4023012
1988-03-01	76.0164187
1988-04-01	75.9169845
1988-05-01	75.0788165
1988-06-01	75.1412452
1988-07-01	74.8453498
1988-08-01	74.1545440
1988-09-01	75.2902306
1988-10-01	74.8485911
1988-11-01	74.6055919
1988-12-01	76.0921108
1989-01-01	75.1006634
1989-02-01	75.7617262
1989-03-01	75.3971092
1989-04-01	75.4706873
1989-05-01	75.5277606
1989-06-01	75.1179929
1989-07-01	75.4266342
1989-08-01	74.8757033
1989-09-01	75.8434959
1989-10-01	75.2588339
1989-11-01	75.2669594
1989-12-01	76.2927152
1990-01-01	75.3723698
1990-02-01	75.6264926
1990-03-01	75.5634348
1990-04-01	75.5837540
1990-05-01	75.7311851
1990-06-01	75.4229475
1990-07-01	75.8708330
1990-08-01	74.9312074
1990-09-01	76.0272242
1990-10-01	75.4078075
1990-11-01	75.1194976
1990-12-01	76.4539152
1991-01-01	75.3151933
1991-02-01	75.4957418
1991-03-01	75.2511223
1991-04-01	75.3157607
1991-05-01	74.8143278
1991-06-01	74.1988830
1991-07-01	73.7665461
1991-08-01	73.8533678
1991-09-01	74.7834948
1991-10-01	73.9650100
1991-11-01	73.7312095
1991-12-01	75.2586315
1992-01-01	74.5363311
1992-02-01	74.7282547
1992-03-01	74.4144460
1992-04-01	74.1233300
1992-05-01	74.1181081
1992-06-01	73.9651059
1992-07-01	74.3912100
1992-08-01	73.5884108
1992-09-01	74.2161117
1992-10-01	73.9561774
1992-11-01	72.9975235
1992-12-01	74.5816733
1993-01-01	74.1703914
1993-02-01	73.8111405
1993-03-01	73.8034522
1993-04-01	73.1387237
1993-05-01	73.3425952
1993-06-01	73.3588247
1993-07-01	73.3206369
1993-08-01	72.6691413
1993-09-01	73.7190083
1993-10-01	73.4231175
1993-11-01	73.2199445
1993-12-01	74.5919929
1994-01-01	73.9306196
1994-02-01	74.0106717
1994-03-01	73.9056224
1994-04-01	73.4598732
1994-05-01	73.3552391
1994-06-01	73.3661730
1994-07-01	73.6237730
1994-08-01	72.8696274
1994-09-01	73.9596252
1994-10-01	73.2907122
1994-11-01	73.0723961
1994-12-01	74.4602039
1995-01-01	73.8202780
1995-02-01	74.3680063
1995-03-01	73.7883323
1995-04-01	73.8216033
1995-05-01	73.6705707
1995-06-01	73.5512024
1995-07-01	73.6259037
1995-08-01	73.1360713
1995-09-01	74.4144817
1995-10-01	73.4024023
1995-11-01	73.5316870
1995-12-01	74.5732442
1996-01-01	73.9991771
1996-02-01	74.2408034
1996-03-01	73.7084482
1996-04-01	73.5538691
1996-05-01	73.5289113
1996-06-01	73.3666714
1996-07-01	73.3737226
1996-08-01	73.1757751
1996-09-01	73.8226141
1996-10-01	73.1786013
1996-11-01	72.8547025
1996-12-01	74.1558078
1997-01-01	73.6052795
1997-02-01	73.5698620
1997-03-01	73.4474795
1997-04-01	73.0516588
1997-05-01	72.8239392
1997-06-01	72.6510737
1997-07-01	72.8064863
1997-08-01	71.8803487
1997-09-01	73.2103263
1997-10-01	72.5313845
1997-11-01	72.7836976
1997-12-01	73.6902392
1998-01-01	73.0460294
1998-02-01	73.1403150
1998-03-01	72.9275520
1998-04-01	72.6187890
1998-05-01	72.6133494
1998-06-01	72.6627115
1998-07-01	72.6162772
1998-08-01	71.8489503
1998-09-01	73.3383268
1998-10-01	72.3790110
1998-11-01	72.1568138
1998-12-01	73.0408292
1999-01-01	72.3170990
1999-02-01	72.6137952
1999-03-01	72.4632008
1999-04-01	72.2779614
1999-05-01	71.9515482
1999-06-01	72.0876052
1999-07-01	72.0437322
1999-08-01	71.6448509
1999-09-01	72.7466811
1999-10-01	72.0645361
1999-11-01	71.5904684
1999-12-01	73.0843260
2000-01-01	71.9445360
2000-02-01	72.3624927
2000-03-01	72.1311995
2000-04-01	72.1971074
2000-05-01	71.9033937
2000-06-01	71.9546873
2000-07-01	72.3365585
2000-08-01	71.4893232
2000-09-01	72.6529528
2000-10-01	71.9096789
2000-11-01	71.4872535
2000-12-01	72.7678747
2001-01-01	71.6782141
2001-02-01	72.1069604
2001-03-01	71.5120376
2001-04-01	71.9739994
2001-05-01	71.7878978
2001-06-01	71.7419487
2001-07-01	71.8808716
2001-08-01	71.2511826
2001-09-01	72.3908615
2001-10-01	71.9532641
2001-11-01	71.4814507
2001-12-01	72.5973209
2002-01-01	72.0114065
2002-02-01	72.3171672
2002-03-01	71.9470539
2002-04-01	71.8601609
2002-05-01	71.7514441
2002-06-01	71.8250256
2002-07-01	71.4056473
2002-08-01	71.0685424
2002-09-01	72.0658283
2002-10-01	71.2881367
2002-11-01	71.2774901
2002-12-01	72.6693820
2003-01-01	72.0444683
2003-02-01	72.2339481
2003-03-01	71.8024898
2003-04-01	71.5669821
2003-05-01	71.3612339
2003-06-01	71.1893618
2003-07-01	71.0493916
2003-08-01	70.6514894
2003-09-01	71.7538715
2003-10-01	71.5102060
2003-11-01	70.9095107
2003-12-01	72.4258346
2004-01-01	71.5856821
2004-02-01	71.8700388
2004-03-01	71.5502805
2004-04-01	71.6113837
2004-05-01	71.4230268
2004-06-01	71.4778219
2004-07-01	71.2940334
2004-08-01	70.4566041
2004-09-01	71.9720582
2004-10-01	71.4293971
2004-11-01	71.1607305
2004-12-01	72.3065341
2005-01-01	71.6945528
2005-02-01	72.0852709
2005-03-01	72.1329213
2005-04-01	72.3877936
2005-05-01	72.0154773
2005-06-01	72.0642343
2005-07-01	71.9378614
2005-08-01	71.6808299
2005-09-01	72.5919942
2005-10-01	71.9898379
2005-11-01	71.6317092
2005-12-01	72.8299561
2006-01-01	71.8262497
2006-02-01	72.5054379
2006-03-01	72.3806738
2006-04-01	72.1957140
2006-05-01	71.9491218
2006-06-01	72.1016415
2006-07-01	72.2641801
2006-08-01	71.6927232
2006-09-01	72.9080402
2006-10-01	72.1085081
2006-11-01	71.7150946
2006-12-01	73.1987967
2007-01-01	72.0339544
2007-02-01	72.6003791
2007-03-01	72.5656413
2007-04-01	72.4955011
2007-05-01	72.4300913
2007-06-01	72.5537385
2007-07-01	72.4158437
2007-08-01	71.9621613
2007-09-01	72.8831033
2007-10-01	72.3117728
2007-11-01	72.3270185
2007-12-01	73.5383259
2008-01-01	72.6924883
2008-02-01	72.8012435
2008-03-01	72.8297132
2008-04-01	72.7930196
2008-05-01	72.5543380
2008-06-01	72.7494619
2008-07-01	72.4706092
2008-08-01	71.8762624
2008-09-01	73.0310802
2008-10-01	72.5207145
2008-11-01	71.9207538
2008-12-01	73.2019267
2009-01-01	72.3386533
2009-02-01	72.7580197
2009-03-01	72.6512702
2009-04-01	72.4565081
2009-05-01	72.4671226
2009-06-01	72.1682804
2009-07-01	72.1415321
2009-08-01	71.5008835
2009-09-01	72.5121489
2009-10-01	72.0707533
2009-11-01	71.6340728
2009-12-01	72.9594119
2010-01-01	72.1733642
2010-02-01	72.6086897
2010-03-01	72.4441771
2010-04-01	72.3716367
2010-05-01	72.0626641
2010-06-01	72.1141575
2010-07-01	72.1510527
2010-08-01	71.5432936
2010-09-01	72.7974932
2010-10-01	72.5624003
2010-11-01	72.2566203
2010-12-01	73.2426398
2011-01-01	72.5054134
2011-02-01	72.8316505
2011-03-01	72.5386231
2011-04-01	72.2142801
2011-05-01	72.0856280
2011-06-01	71.8525517
2011-07-01	71.9573064
2011-08-01	71.4538598
2011-09-01	72.4403440
2011-10-01	72.0567269
2011-11-01	71.6611517
2011-12-01	72.4800038
2012-01-01	71.7901381
2012-02-01	72.1179911
2012-03-01	71.9695568
2012-04-01	71.7582449
2012-05-01	71.8854004
2012-06-01	71.5354515
2012-07-01	71.5253169
2012-08-01	70.8830309
2012-09-01	72.0751580
2012-10-01	71.6829327
2012-11-01	71.1410340
2012-12-01	72.3709508
2013-01-01	71.4793235
2013-02-01	71.9954232
2013-03-01	71.7396025
2013-04-01	71.5649719
2013-05-01	71.6923447
2013-06-01	71.5790111
2013-07-01	71.3288157
2013-08-01	70.6095302
2013-09-01	71.4321264
2013-10-01	71.1277626
2013-11-01	70.6943058
2013-12-01	71.4644025
2014-01-01	70.6582821
2014-02-01	71.5344227
2014-03-01	71.1527842
2014-04-01	71.1108958
2014-05-01	70.8203423
2014-06-01	70.8669655
2014-07-01	70.9241928
2014-08-01	70.7594529
2014-09-01	70.6045662
2014-10-01	70.7228034
2014-11-01	70.9191091
2014-12-01	71.4146941
2015-01-01	70.8561388
2015-02-01	71.9191072
2015-03-01	71.5273587
2015-04-01	71.1911700
2015-05-01	71.1815553
2015-06-01	70.8707258
2015-07-01	70.9955168
2015-08-01	70.5401089
2015-09-01	70.8099196
2015-10-01	70.9645523
2015-11-01	70.8232647
2015-12-01	71.4881933
2016-01-01	70.9855507
2016-02-01	71.4159655
2016-03-01	71.0337367
2016-04-01	70.6792537
2016-05-01	70.8252823
2016-06-01	70.4239220
2016-07-01	70.5606827
2016-08-01	70.0433763
2016-09-01	69.9534477
2016-10-01	70.1038536
2016-11-01	70.2356928
2016-12-01	71.0418459
2017-01-01	69.7376749
2017-02-01	71.0463543
2017-03-01	70.7414264
2017-04-01	70.7923182
2017-05-01	70.7697140
2017-06-01	70.5675612
2017-07-01	70.7636628
2017-08-01	70.3656771
2017-09-01	70.5988123
2017-10-01	70.3926353
2017-11-01	70.8077274
2017-12-01	71.6333808
2018-01-01	70.6833512
2018-02-01	71.6412875
2018-03-01	71.0884748
2018-04-01	71.0532577
2018-05-01	70.8747438
2018-06-01	70.9402806
2018-07-01	70.9247197
2018-08-01	70.6680371
2018-09-01	70.6055261