Month	Percent
1978-02-01	19.9047311556958
1978-03-01	20.4981722496954
1978-04-01	20.7510914904191
1978-05-01	21.0649736173628
1978-06-01	21.1193065995822
1978-07-01	21.5536093737427
1978-08-01	21.8331858636470
1978-09-01	21.8277433957532
1978-10-01	21.8349894354002
1978-11-01	22.1659113912138
1978-12-01	20.2160110898419
1979-01-01	21.1517145739078
1979-02-01	20.9798208732919
1979-03-01	21.2634281410744
1979-04-01	21.4230076096820
1979-05-01	21.6291475109637
1979-06-01	21.7417073574824
1979-07-01	21.8976589231486
1979-08-01	22.2346467956459
1979-09-01	21.5686432997444
1979-10-01	21.9538890669877
1979-11-01	22.3030935446901
1979-12-01	20.5320544803542
1980-01-01	21.3289342705331
1980-02-01	21.2608398353705
1980-03-01	21.5208148323978
1980-04-01	22.1201422278799
1980-05-01	21.3751053206304
1980-06-01	21.9011086404215
1980-07-01	21.8713904318721
1980-08-01	22.1549836748895
1980-09-01	21.5339552477835
1980-10-01	22.1038545120592
1980-11-01	22.3819666240288
1980-12-01	20.3511654361366
1981-01-01	21.5046625595404
1981-02-01	21.2577015695078
1981-03-01	21.2675748813628
1981-04-01	21.7843368412617
1981-05-01	21.8938019428843
1981-06-01	22.2636989055734
1981-07-01	22.0598335881995
1981-08-01	22.5039224731038
1981-09-01	21.7074043985284
1981-10-01	22.6775338073522
1981-11-01	22.9899757014636
1981-12-01	21.4878451842744
1982-01-01	22.2572791981599
1982-02-01	21.7658887120327
1982-03-01	22.0002697944914
1982-04-01	22.8528383515772
1982-05-01	22.6682706917580
1982-06-01	23.0217459915277
1982-07-01	22.9198199716829
1982-08-01	23.4301971117310
1982-09-01	22.4145102592932
1982-10-01	22.5488730747660
1982-11-01	23.1193495577828
1982-12-01	21.8231869260710
1983-01-01	22.8957285211635
1983-02-01	22.3650002110193
1983-03-01	22.7466927814425
1983-04-01	23.2486822331718
1983-05-01	23.2824623078943
1983-06-01	23.6444901912207
1983-07-01	23.5246299887684
1983-08-01	24.1441492935579
1983-09-01	22.9781412612494
1983-10-01	23.9069100622584
1983-11-01	24.1209721265826
1983-12-01	22.5582001565016
1984-01-01	23.5269156878234
1984-02-01	23.0477270698237
1984-03-01	22.8009090861042
1984-04-01	23.5211732591060
1984-05-01	23.6395495403077
1984-06-01	23.8137615948328
1984-07-01	23.8068860190818
1984-08-01	24.3869109183914
1984-09-01	23.7482448700055
1984-10-01	24.4279135598330
1984-11-01	24.6122927531136
1984-12-01	23.5878928293626
1985-01-01	24.1848459548318
1985-02-01	23.7631041341169
1985-03-01	23.7210076803135
1985-04-01	24.6951628675507
1985-05-01	24.3266329717900
1985-06-01	24.4668113335212
1985-07-01	24.6386597130877
1985-08-01	24.7826759804479
1985-09-01	23.6968824303809
1985-10-01	24.8510600346765
1985-11-01	24.1714856448571
1985-12-01	23.6312354886233
1986-01-01	23.9133312227265
1986-02-01	23.7161090867458
1986-03-01	23.5819217069918
1986-04-01	23.8774745907765
1986-05-01	24.2720201130652
1986-06-01	24.1884784542931
1986-07-01	24.4549518123071
1986-08-01	24.9024067038100
1986-09-01	23.8528783247015
1986-10-01	24.5894811609995
1986-11-01	24.9322952123372
1986-12-01	23.3667227862343
1987-01-01	24.5531092386408
1987-02-01	24.2044897367318
1987-03-01	23.7969987076742
1987-04-01	24.5590528937635
1987-05-01	24.7199827970472
1987-06-01	24.7194319158506
1987-07-01	24.3635495722597
1987-08-01	25.2910596038219
1987-09-01	24.8615051083437
1987-10-01	25.2106391005100
1987-11-01	25.6938734632568
1987-12-01	23.9108611144495
1988-01-01	24.5376793324386
1988-02-01	24.5976988434683
1988-03-01	23.9835813491714
1988-04-01	24.0830155624832
1988-05-01	24.9211835469337
1988-06-01	24.8587548268174
1988-07-01	25.1546502494741
1988-08-01	25.8454560482419
1988-09-01	24.7097694442203
1988-10-01	25.1514089068796
1988-11-01	25.3944080829553
1988-12-01	23.9078892485837
1989-01-01	24.8993365979292
1989-02-01	24.2382738518161
1989-03-01	24.6028908081169
1989-04-01	24.5293127390208
1989-05-01	24.4722393925293
1989-06-01	24.8820071460091
1989-07-01	24.5733658471713
1989-08-01	25.1242966940924
1989-09-01	24.1565041221414
1989-10-01	24.7411660923978
1989-11-01	24.7330406172546
1989-12-01	23.7072848548663
1990-01-01	24.6276302121008
1990-02-01	24.3735074145128
1990-03-01	24.4365652455770
1990-04-01	24.4162459589899
1990-05-01	24.2688149073485
1990-06-01	24.5770524946329
1990-07-01	24.1291669799369
1990-08-01	25.0687925767788
1990-09-01	23.9727757758834
1990-10-01	24.5921924906033
1990-11-01	24.8805024114134
1990-12-01	23.5460848376081
1991-01-01	24.6848067241902
1991-02-01	24.5042581951466
1991-03-01	24.7488777466529
1991-04-01	24.6842392651286
1991-05-01	25.1856722439170
1991-06-01	25.8011169608873
1991-07-01	26.2334538749903
1991-08-01	26.1466322466387
1991-09-01	25.2165051972642
1991-10-01	26.0349899594840
1991-11-01	26.2687904905036
1991-12-01	24.7413685360041
1992-01-01	25.4636688936921
1992-02-01	25.2717452526680
1992-03-01	25.5855539712147
1992-04-01	25.8766700070524
1992-05-01	25.8818919011462
1992-06-01	26.0348941557946
1992-07-01	25.6087900084776
1992-08-01	26.4115891897826
1992-09-01	25.7838883513498
1992-10-01	26.0438225772034
1992-11-01	27.0024764902177
1992-12-01	25.4183266902649
1993-01-01	25.8296085688120
1993-02-01	26.1888595045883
1993-03-01	26.1965478211407
1993-04-01	26.8612763459661
1993-05-01	26.6574048253342
1993-06-01	26.6411753300686
1993-07-01	26.6793631299411
1993-08-01	27.3308586957886
1993-09-01	26.2809916686232
1993-10-01	26.5768824844767
1993-11-01	26.7800555173966
1993-12-01	25.4080070668206
1994-01-01	26.0693803818349
1994-02-01	25.9893283272396
1994-03-01	26.0943776061910
1994-04-01	26.5401267548228
1994-05-01	26.6447609372509
1994-06-01	26.6338270521967
1994-07-01	26.3762270600991
1994-08-01	27.1303725928920
1994-09-01	26.0403747746066
1994-10-01	26.7092878116452
1994-11-01	26.9276039010644
1994-12-01	25.5397960877877
1995-01-01	26.1797220127157
1995-02-01	25.6319937228025
1995-03-01	26.2116677479182
1995-04-01	26.1783966963854
1995-05-01	26.3294293298039
1995-06-01	26.4487975961168
1995-07-01	26.3740963511208
1995-08-01	26.8639287374830
1995-09-01	25.5855183431355
1995-10-01	26.5975977075858
1995-11-01	26.4683130240881
1995-12-01	25.4267557693464
1996-01-01	26.0008228778470
1996-02-01	25.7591966366108
1996-03-01	26.2915518206754
1996-04-01	26.4461309110298
1996-05-01	26.4710887335705
1996-06-01	26.6333286499742
1996-07-01	26.6262774225507
1996-08-01	26.8242248958157
1996-09-01	26.1773858849257
1996-10-01	26.8213986961942
1996-11-01	27.1452974953277
1996-12-01	25.8441921683926
1997-01-01	26.3947205494007
1997-02-01	26.4301380437231
1997-03-01	26.5525205494762
1997-04-01	26.9483411958710
1997-05-01	27.1760608222562
1997-06-01	27.3489263376494
1997-07-01	27.1935136898560
1997-08-01	28.1196512969304
1997-09-01	26.7896736924269
1997-10-01	27.4686154595119
1997-11-01	27.2163024259925
1997-12-01	26.3097608002644
1998-01-01	26.9539705903538
1998-02-01	26.8596849952493
1998-03-01	27.0724479708840
1998-04-01	27.3812110248135
1998-05-01	27.3866505860611
1998-06-01	27.3372884591862
1998-07-01	27.3837228091862
1998-08-01	28.1510497450560
1998-09-01	26.6616732435744
1998-10-01	27.6209890083084
1998-11-01	27.8431861712800
1998-12-01	26.9591707874705
1999-01-01	27.6829010113077
1999-02-01	27.3862048254846
1999-03-01	27.5367991872579
1999-04-01	27.7220386421128
1999-05-01	28.0484517704229
1999-06-01	27.9123948107339
1999-07-01	27.9562678219683
1999-08-01	28.3551491086006
1999-09-01	27.2533188794150
1999-10-01	27.9354638808527
1999-11-01	28.4095315676046
1999-12-01	26.9156739717749
2000-01-01	28.0554640208849
2000-02-01	27.6375073339013
2000-03-01	27.8688005241263
2000-04-01	27.8028925882459
2000-05-01	28.0966062817368
2000-06-01	28.0453126804583
2000-07-01	27.6634415132130
2000-08-01	28.5106768422370
2000-09-01	27.3470472491742
2000-10-01	28.0903210961134
2000-11-01	28.5127465522887
2000-12-01	27.2321253350513
2001-01-01	28.3217858838611
2001-02-01	27.8930396255500
2001-03-01	28.4879623920115
2001-04-01	28.0260006092038
2001-05-01	28.2121021895585
2001-06-01	28.2580512670227
2001-07-01	28.1191283923207
2001-08-01	28.7488174046062
2001-09-01	27.6091384945528
2001-10-01	28.0467359019681
2001-11-01	28.5185492664466
2001-12-01	27.4026790586531
2002-01-01	27.9885935236332
2002-02-01	27.6828328021104
2002-03-01	28.0529461567416
2002-04-01	28.1398391458453
2002-05-01	28.2485559574158
2002-06-01	28.1749744246719
2002-07-01	28.5943527307311
2002-08-01	28.9314576174225
2002-09-01	27.9341717308022
2002-10-01	28.7118633296040
2002-11-01	28.7225099035288
2002-12-01	27.3306180351472
2003-01-01	27.9555316923313
2003-02-01	27.7660519467860
2003-03-01	28.1975101796259
2003-04-01	28.4330179355310
2003-05-01	28.6387661101742
2003-06-01	28.8106381816436
2003-07-01	28.9506084345641
2003-08-01	29.3485106195122
2003-09-01	28.2461285244709
2003-10-01	28.4897940106714
2003-11-01	29.0904893016981
2003-12-01	27.5741653795820
2004-01-01	28.4143179055276
2004-02-01	28.1299611789939
2004-03-01	28.4497195476680
2004-04-01	28.3886163219229
2004-05-01	28.5769732048335
2004-06-01	28.5221781483228
2004-07-01	28.7059665803081
2004-08-01	29.5433958953830
2004-09-01	28.0279417775850
2004-10-01	28.5706029044268
2004-11-01	28.8392695321218
2004-12-01	27.6934658631287
2005-01-01	28.3054471778053
2005-02-01	27.9147290984219
2005-03-01	27.8670787282032
2005-04-01	27.6122063677201
2005-05-01	27.9845227363890
2005-06-01	27.9357656888951
2005-07-01	28.0621386197610
2005-08-01	28.3191701424938
2005-09-01	27.4080058271326
2005-10-01	28.0101621115742
2005-11-01	28.3682907986217
2005-12-01	27.1700438699141
2006-01-01	28.1737503297995
2006-02-01	27.4945620842724
2006-03-01	27.6193262430760
2006-04-01	27.8042860440277
2006-05-01	28.0508781966214
2006-06-01	27.8983585185692
2006-07-01	27.7358198905339
2006-08-01	28.3072768162646
2006-09-01	27.0919597813179
2006-10-01	27.8914919307433
2006-11-01	28.2849054449412
2006-12-01	26.8012033517836
2007-01-01	27.9660456479123
2007-02-01	27.3996209104949
2007-03-01	27.4343586826134
2007-04-01	27.5044988687510
2007-05-01	27.5699087565286
2007-06-01	27.4462614848716
2007-07-01	27.5841563032142
2007-08-01	28.0378387302178
2007-09-01	27.1168966995731
2007-10-01	27.6882271655008
2007-11-01	27.6729815499746
2007-12-01	26.4616741051858
2008-01-01	27.3075116548494
2008-02-01	27.1987565110159
2008-03-01	27.1702868298507
2008-04-01	27.2069803844918
2008-05-01	27.4456620239193
2008-06-01	27.2505380727320
2008-07-01	27.5293908231973
2008-08-01	28.1237376519812
2008-09-01	26.9689197637651
2008-10-01	27.4792855358487
2008-11-01	28.0792462529777
2008-12-01	26.7980733477444
2009-01-01	27.6613466868463
2009-02-01	27.2419803005928
2009-03-01	27.3487297954053
2009-04-01	27.5434918751158
2009-05-01	27.5328773588798
2009-06-01	27.8317196524413
2009-07-01	27.8584678669089
2009-08-01	28.4991165596028
2009-09-01	27.4878511096054
2009-10-01	27.9292467248014
2009-11-01	28.3659271696265
2009-12-01	27.0405881219788
2010-01-01	27.8266358327473
2010-02-01	27.3913103385311
2010-03-01	27.5558229318464
2010-04-01	27.6283633402996
2010-05-01	27.9373359458300
2010-06-01	27.8858425083799
2010-07-01	27.8489473237213
2010-08-01	28.4567064475720
2010-09-01	27.2025068326234
2010-10-01	27.4375996941576
2010-11-01	27.7433796952506
2010-12-01	26.7573602243185
2011-01-01	27.4945865725630
2011-02-01	27.1683495090546
2011-03-01	27.4613769130579
2011-04-01	27.7857199004914
2011-05-01	27.9143719805812
2011-06-01	28.1474482834299
2011-07-01	28.0426936426388
2011-08-01	28.5461402488568
2011-09-01	27.5596560073792
2011-10-01	27.9432731002514
2011-11-01	28.3388482961238
2011-12-01	27.5199962461621
2012-01-01	28.2098619412385
2012-02-01	27.8820088588935
2012-03-01	28.0304431497927
2012-04-01	28.2417551457726
2012-05-01	28.1145995646592
2012-06-01	28.4645485107527
2012-07-01	28.4746831134758
2012-08-01	29.1169691246587
2012-09-01	27.9248419909259
2012-10-01	28.3170673192760
2012-11-01	28.8589660188837
2012-12-01	27.6290491879801
2013-01-01	28.5206764536601
2013-02-01	28.0045767591464
2013-03-01	28.2603974779361
2013-04-01	28.4350281105237
2013-05-01	28.3076553191790
2013-06-01	28.4209888620602
2013-07-01	28.6711842902260
2013-08-01	29.3904697951418
2013-09-01	28.5678735817818
2013-10-01	28.8722374000340
2013-11-01	29.3056941694739
2013-12-01	28.5355974650030
2014-01-01	29.3417179471282
2014-02-01	28.4655773307407
2014-03-01	28.8472157650547
2014-04-01	28.8891041574281
2014-05-01	29.1796577388042
2014-06-01	29.1330344981612
2014-07-01	29.0758072387653
2014-08-01	29.2405471455009
2014-09-01	29.3954338522042
2014-10-01	29.2771965880295
2014-11-01	29.0808908842850
2014-12-01	28.5853059032419
2015-01-01	29.1438611722228
2015-02-01	28.0808928214980
2015-03-01	28.4726412538296
2015-04-01	28.8088300057657
2015-05-01	28.8184447290863
2015-06-01	29.1292741673781
2015-07-01	29.0044832226505
2015-08-01	29.4598910941259
2015-09-01	29.1900803592457
2015-10-01	29.0354476771281
2015-11-01	29.1767352966235
2015-12-01	28.5118066870155
2016-01-01	29.0144492982658
2016-02-01	28.5840344702440
2016-03-01	28.9662632888676
2016-04-01	29.3207462592289
2016-05-01	29.1747177158987
2016-06-01	29.5760780064149
2016-07-01	29.4393172680792
2016-08-01	29.9566236902094
2016-09-01	30.0465522579311
2016-10-01	29.8961464286158
2016-11-01	29.7643072141171
2016-12-01	28.9581541130420
2017-01-01	30.2623251311027
2017-02-01	28.9536456667519
2017-03-01	29.2585735720359
2017-04-01	29.2076817781850
2017-05-01	29.2302859673056
2017-06-01	29.4324387695374
2017-07-01	29.2363371803600
2017-08-01	29.6343228494737
2017-09-01	29.4011877295036
2017-10-01	29.6073647166216
2017-11-01	29.1922726141083
2017-12-01	28.3666191952834
2018-01-01	29.3166488158147
2018-02-01	28.3587125387803
2018-03-01	28.9115252029480
2018-04-01	28.9467422557660
2018-05-01	29.1252561692113
2018-06-01	29.0597194031160
2018-07-01	29.0752803512687
2018-08-01	29.3319629156787
2018-09-01	29.3944739069632