Month	Percent
1978-02-01	3.79353387388800
1978-03-01	3.48153414825175
1978-04-01	3.38043332017787
1978-05-01	3.46522653911091
1978-06-01	3.60210147590697
1978-07-01	3.49215018824383
1978-08-01	3.51072224755158
1978-09-01	3.45606453039508
1978-10-01	3.24617721621132
1978-11-01	3.46983742527877
1978-12-01	3.33961353147312
1979-01-01	3.46120299553351
1979-02-01	3.48324765778674
1979-03-01	3.32186003352947
1979-04-01	3.19276644622414
1979-05-01	3.25501666068667
1979-06-01	3.23579877952894
1979-07-01	3.01146752965072
1979-08-01	2.94649716360116
1979-09-01	2.91396805929856
1979-10-01	2.95816189847762
1979-11-01	2.79380473492459
1979-12-01	2.88718949925495
1980-01-01	3.51596890856128
1980-02-01	3.44625691467301
1980-03-01	3.23594380696431
1980-04-01	3.13170561065847
1980-05-01	3.47911056805415
1980-06-01	3.28216168367689
1980-07-01	3.19569079623890
1980-08-01	3.18242884433147
1980-09-01	3.18992261265862
1980-10-01	2.85982561053835
1980-11-01	2.84991823187619
1980-12-01	2.78647160406869
1981-01-01	3.13573805125200
1981-02-01	3.06291823943933
1981-03-01	3.08238915004662
1981-04-01	2.91300798612375
1981-05-01	3.07072794846413
1981-06-01	2.95824622307857
1981-07-01	3.19534526025767
1981-08-01	3.20681266960500
1981-09-01	3.25675911315356
1981-10-01	3.18561624124371
1981-11-01	3.20240617755470
1981-12-01	3.12278094503161
1982-01-01	3.53138878968709
1982-02-01	3.76319745613963
1982-03-01	3.67574207397730
1982-04-01	3.56795579435391
1982-05-01	3.64233910494571
1982-06-01	3.81366474268380
1982-07-01	4.18171904154786
1982-08-01	4.39774208010223
1982-09-01	4.87228177616407
1982-10-01	5.09300373628315
1982-11-01	5.59576108898961
1982-12-01	6.11002849439098
1983-01-01	6.63993505552639
1983-02-01	7.01710193463491
1983-03-01	7.06852391244554
1983-04-01	7.24563707028747
1983-05-01	7.23034208704019
1983-06-01	7.14545037372631
1983-07-01	7.18780912314608
1983-08-01	7.26811386475682
1983-09-01	7.09965303775102
1983-10-01	6.76789737631324
1983-11-01	6.30847979692935
1983-12-01	6.18639261827413
1984-01-01	7.02992262559830
1984-02-01	6.88975576438515
1984-03-01	6.33304177679070
1984-04-01	6.17700659296848
1984-05-01	6.29259087465666
1984-06-01	6.15290780214469
1984-07-01	5.93355187705347
1984-08-01	6.25547531617422
1984-09-01	6.25050822917488
1984-10-01	5.70006710593954
1984-11-01	5.45912973037697
1984-12-01	5.61402368855811
1985-01-01	6.15600355890280
1985-02-01	6.01648420820018
1985-03-01	5.98835865725601
1985-04-01	5.93135757287134
1985-05-01	5.99112930058486
1985-06-01	6.10511712502952
1985-07-01	5.55530346234476
1985-08-01	5.62589101192715
1985-09-01	5.38677137148698
1985-10-01	4.93793494803968
1985-11-01	5.01274955798773
1985-12-01	4.89465566903655
1986-01-01	5.33884141951785
1986-02-01	5.59607545161521
1986-03-01	5.38092126094505
1986-04-01	5.32894335090781
1986-05-01	5.52560219473306
1986-06-01	5.29907581283594
1986-07-01	5.51383557868671
1986-08-01	5.68990697509052
1986-09-01	5.62794068772934
1986-10-01	5.36847407077764
1986-11-01	5.60595623945862
1986-12-01	5.52849468966535
1987-01-01	6.16621372590144
1987-02-01	5.96091304371364
1987-03-01	6.04778989739511
1987-04-01	5.75431871167768
1987-05-01	5.91936048126030
1987-06-01	5.79386261073431
1987-07-01	5.70869183834768
1987-08-01	5.51206954108125
1987-09-01	5.49728573433279
1987-10-01	5.37079687593287
1987-11-01	5.22476917223033
1987-12-01	5.02322700724740
1988-01-01	5.19789200400467
1988-02-01	5.13274203706308
1988-03-01	4.99946928025820
1988-04-01	5.04998586020647
1988-05-01	4.79384630922180
1988-06-01	4.83824642357917
1988-07-01	4.60857325137753
1988-08-01	4.67275321915928
1988-09-01	4.67521789302255
1988-10-01	4.50892511796239
1988-11-01	4.18518141633166
1988-12-01	4.45966057701342
1989-01-01	4.83816370241104
1989-02-01	4.89484473466417
1989-03-01	4.37561212773304
1989-04-01	4.24848603115783
1989-05-01	4.27555504488224
1989-06-01	4.21142845590884
1989-07-01	4.11776003975130
1989-08-01	4.00974865514645
1989-09-01	4.20759427836102
1989-10-01	3.60015366375077
1989-11-01	3.57313850376077
1989-12-01	3.76371615917168
1990-01-01	4.29087562773784
1990-02-01	4.55084678248501
1990-03-01	4.27493198574912
1990-04-01	4.24060052289462
1990-05-01	4.41009547592264
1990-06-01	4.42491104923990
1990-07-01	4.82524825020266
1990-08-01	4.91452087703507
1990-09-01	5.46915362935264
1990-10-01	5.47271383324006
1990-11-01	5.83000995583211
1990-12-01	5.74739350557442
1991-01-01	6.83598400836383
1991-02-01	6.99743339942252
1991-03-01	7.17714612338837
1991-04-01	7.48003984988007
1991-05-01	7.33936279139728
1991-06-01	7.26760541985374
1991-07-01	7.70636674292485
1991-08-01	7.95227303554411
1991-09-01	7.99002202875872
1991-10-01	7.76507097380354
1991-11-01	7.89730466702831
1991-12-01	8.00034933439069
1992-01-01	8.51787889827703
1992-02-01	8.87027763021979
1992-03-01	8.48298788249613
1992-04-01	8.35113095630468
1992-05-01	8.67042722561624
1992-06-01	8.71344013941889
1992-07-01	8.91186140265232
1992-08-01	8.71749482125231
1992-09-01	8.62290966810192
1992-10-01	8.45088670378741
1992-11-01	8.94404537170625
1992-12-01	9.14946263610147
1993-01-01	9.86199197279792
1993-02-01	9.83082981209630
1993-03-01	9.02112708106192
1993-04-01	9.35994632853749
1993-05-01	9.26418710332470
1993-06-01	9.20675525869677
1993-07-01	8.89833608475201
1993-08-01	8.95289048669541
1993-09-01	8.87643807006725
1993-10-01	8.61708421053818
1993-11-01	8.74609579368893
1993-12-01	8.52325489817962
1994-01-01	9.37262253696462
1994-02-01	8.99076023606651
1994-03-01	8.60111642207690
1994-04-01	8.14657487537530
1994-05-01	7.80149077258209
1994-06-01	7.82284103417769
1994-07-01	7.39047466070674
1994-08-01	7.59289075467895
1994-09-01	7.54666705748583
1994-10-01	7.13405000001913
1994-11-01	7.13739640131942
1994-12-01	6.82235146239041
1995-01-01	7.81229703297608
1995-02-01	7.56858977651488
1995-03-01	7.20086060386301
1995-04-01	7.01892407149909
1995-05-01	7.04417063569880
1995-06-01	6.64296234330208
1995-07-01	6.73585294022131
1995-08-01	6.85789250445886
1995-09-01	6.90385432546511
1995-10-01	6.83752350906439
1995-11-01	6.41802552734264
1995-12-01	6.41209812791763
1996-01-01	7.22898477406137
1996-02-01	7.11718975446555
1996-03-01	6.92405617935102
1996-04-01	6.85977130319527
1996-05-01	6.69314060769749
1996-06-01	6.46691991358690
1996-07-01	6.39523588225250
1996-08-01	7.01895240825599
1996-09-01	6.88990190293600
1996-10-01	6.52554629346804
1996-11-01	6.36812820391628
1996-12-01	6.38976370764818
1997-01-01	7.12625178962016
1997-02-01	7.23627149917397
1997-03-01	7.05644154626512
1997-04-01	6.82110931980198
1997-05-01	6.91346221439055
1997-06-01	6.53715574763194
1997-07-01	6.66075645918809
1997-08-01	6.56632421956692
1997-09-01	6.50844779813002
1997-10-01	6.16997380815689
1997-11-01	6.25537286547560
1997-12-01	6.08741209089632
1998-01-01	6.69877919152730
1998-02-01	6.76467726126730
1998-03-01	6.63885598547985
1998-04-01	6.15087676418875
1998-05-01	6.38082736754230
1998-06-01	6.38576616186607
1998-07-01	6.33604360276019
1998-08-01	6.57644304398646
1998-09-01	6.36879939133691
1998-10-01	5.87365763803776
1998-11-01	6.10166396584215
1998-12-01	5.72461831541639
1999-01-01	6.29714721882616
1999-02-01	6.23632324177531
1999-03-01	5.56752473691579
1999-04-01	5.68783346732570
1999-05-01	5.74809933486650
1999-06-01	5.30933024387569
1999-07-01	5.17557669364806
1999-08-01	5.49669742028348
1999-09-01	5.80141602888798
1999-10-01	5.47270681803917
1999-11-01	4.95969438986921
1999-12-01	5.12428607080475
2000-01-01	5.79852840795826
2000-02-01	5.46846609498157
2000-03-01	5.36872985845485
2000-04-01	5.04080262855601
2000-05-01	5.23136884373714
2000-06-01	4.98160445122564
2000-07-01	4.83506255702464
2000-08-01	5.01141613209078
2000-09-01	5.23008622915624
2000-10-01	4.93422379919310
2000-11-01	4.92388316816248
2000-12-01	4.94400399957281
2001-01-01	5.46159561584295
2001-02-01	5.73151370592456
2001-03-01	5.40249676992238
2001-04-01	5.49739549519938
2001-05-01	5.34139475194204
2001-06-01	5.32936625782108
2001-07-01	5.18310455994276
2001-08-01	5.57067974908428
2001-09-01	5.55242128492989
2001-10-01	5.36817319129785
2001-11-01	5.37783446569332
2001-12-01	5.06280415473685
2002-01-01	5.95277244160106
2002-02-01	5.77034332767894
2002-03-01	5.54296606550963
2002-04-01	5.40384150236654
2002-05-01	5.19446254874130
2002-06-01	5.03257777909569
2002-07-01	4.55176787818612
2002-08-01	4.82719386721926
2002-09-01	4.98767676569029
2002-10-01	4.55909321854084
2002-11-01	4.47340088634893
2002-12-01	4.47326783865049
2003-01-01	5.12270906572694
2003-02-01	5.14025530371810
2003-03-01	4.75282739493169
2003-04-01	4.84978733305814
2003-05-01	4.81078684034407
2003-06-01	4.85325836250759
2003-07-01	4.50448697619950
2003-08-01	4.33126965697523
2003-09-01	4.36214443735905
2003-10-01	4.30149186493250
2003-11-01	4.11213371200586
2003-12-01	3.84711588672148
2004-01-01	4.34573980625945
2004-02-01	4.55798047474983
2004-03-01	4.01006169743234
2004-04-01	4.14712824145897
2004-05-01	4.07165522659178
2004-06-01	4.06527791001772
2004-07-01	3.88904237774880
2004-08-01	3.80748947935530
2004-09-01	4.08378151228727
2004-10-01	3.54441880904831
2004-11-01	3.56631088810110
2004-12-01	3.40762519338521
2005-01-01	3.97728628911152
2005-02-01	3.85239620204482
2005-03-01	3.75148973889536
2005-04-01	3.68931430100626
2005-05-01	3.70354991864545
2005-06-01	3.64753202861139
2005-07-01	3.22513136603599
2005-08-01	3.71593394936545
2005-09-01	3.72493900254195
2005-10-01	3.52030952927229
2005-11-01	3.52340584005200
2005-12-01	3.50193648931812
2006-01-01	4.25185951548654
2006-02-01	4.10618976498184
2006-03-01	3.52288859519809
2006-04-01	3.52469451396413
2006-05-01	3.44931113968535
2006-06-01	3.42225240242251
2006-07-01	3.14326212525194
2006-08-01	3.40868801474407
2006-09-01	3.31569439572396
2006-10-01	3.26692649193057
2006-11-01	3.06575997113838
2006-12-01	2.82429927152966
2007-01-01	3.46153589034177
2007-02-01	3.38252431114444
2007-03-01	3.10291631915502
2007-04-01	3.02460449371082
2007-05-01	2.88654129163700
2007-06-01	2.94670996340152
2007-07-01	2.68734213175451
2007-08-01	2.64858632869385
2007-09-01	2.90704580171655
2007-10-01	2.65383087168986
2007-11-01	2.91715725528322
2007-12-01	2.80667019955471
2008-01-01	2.85365138905819
2008-02-01	2.77895671478164
2008-03-01	2.86898590726390
2008-04-01	3.08549839718154
2008-05-01	3.02717239844349
2008-06-01	2.78450630269807
2008-07-01	2.74361579024039
2008-08-01	2.91546588947367
2008-09-01	3.01253741741537
2008-10-01	2.88675119046543
2008-11-01	2.90933595038887
2008-12-01	3.00792131347334
2009-01-01	4.18303061463106
2009-02-01	4.38042613506127
2009-03-01	4.66221310671539
2009-04-01	4.51617523805393
2009-05-01	5.04383656638483
2009-06-01	5.10927873571482
2009-07-01	4.53769757677660
2009-08-01	4.47279661959437
2009-09-01	4.51369608049618
2009-10-01	4.50386006271597
2009-11-01	4.13283773981319
2009-12-01	4.07213831966415
2010-01-01	4.13998231290274
2010-02-01	4.30729431255165
2010-03-01	4.21568826035951
2010-04-01	3.94637003548627
2010-05-01	3.96686861065714
2010-06-01	3.69603908858789
2010-07-01	3.70902878655793
2010-08-01	3.32774539916355
2010-09-01	3.57731900028710
2010-10-01	3.64639280306519
2010-11-01	3.38265064584267
2010-12-01	3.04408115843942
2011-01-01	3.50631592813462
2011-02-01	3.60734672499357
2011-03-01	3.40110288585786
2011-04-01	3.35990815811134
2011-05-01	3.56440755054000
2011-06-01	3.39408126383184
2011-07-01	3.55349470508524
2011-08-01	3.63453068252060
2011-09-01	3.82270107573257
2011-10-01	3.82709337459926
2011-11-01	3.80335726119420
2011-12-01	3.38085180609216
2012-01-01	4.01953198387404
2012-02-01	3.99450095172021
2012-03-01	3.84692603595960
2012-04-01	3.63888130486979
2012-05-01	3.58616250043467
2012-06-01	3.55252475575514
2012-07-01	3.57722102237165
2012-08-01	3.79522940991542
2012-09-01	4.29885930544992
2012-10-01	3.87522597541568
2012-11-01	3.65066023575414
2012-12-01	3.70594870482588
2013-01-01	4.23555496006406
2013-02-01	4.46465328759868
2013-03-01	4.39232465357281
2013-04-01	4.31291740688804
2013-05-01	4.41039714949003
2013-06-01	4.50922202732098
2013-07-01	4.26360128807458
2013-08-01	4.37486926394210
2013-09-01	4.36403534344364
2013-10-01	4.60258275423028
2013-11-01	4.68455644015642
2013-12-01	4.59897816412771
2014-01-01	5.03175166820456
2014-02-01	4.79077944501395
2014-03-01	4.49643808214660
2014-04-01	4.39757568141607
2014-05-01	4.39333149469170
2014-06-01	4.37110311191947
2014-07-01	4.58938168845597
2014-08-01	4.62698005249501
2014-09-01	4.89505573372489
2014-10-01	4.66137775250302
2014-11-01	4.46734267361438
2014-12-01	4.35904861685145
2015-01-01	5.05241449281983
2015-02-01	4.90143682221824
2015-03-01	4.67026305674468
2015-04-01	4.48789282640607
2015-05-01	4.29442641088404
2015-06-01	4.45284315692438
2015-07-01	4.55281282563823
2015-08-01	4.97849524526999
2015-09-01	4.82609248284138
2015-10-01	4.43804715502626
2015-11-01	4.08068210686278
2015-12-01	4.00382540062115
2016-01-01	4.78511500541279
2016-02-01	4.41332078119717
2016-03-01	4.26117381403790
2016-04-01	4.03475861667643
2016-05-01	4.02441849204005
2016-06-01	3.78896090539152
2016-07-01	3.89034523506460
2016-08-01	4.10798909936263
2016-09-01	4.06752552367763
2016-10-01	3.93115386258824
2016-11-01	3.87376878708913
2016-12-01	3.94562125223892
2017-01-01	4.46230624530195
2017-02-01	4.48288618639533
2017-03-01	4.34664909505899
2017-04-01	3.92385497396372
2017-05-01	3.98774188936478
2017-06-01	3.84489167772920
2017-07-01	4.11968361879601
2017-08-01	4.24166800714863
2017-09-01	3.87964133494370
2017-10-01	3.79255670806734
2017-11-01	3.80296497473924
2017-12-01	3.92080854881348
2018-01-01	4.34699836647514
2018-02-01	4.16805425397231
2018-03-01	3.94189642054440
2018-04-01	3.85712498166755
2018-05-01	3.99496725090772
2018-06-01	3.82511291740338
2018-07-01	3.94124922339367
2018-08-01	3.83494063685441
2018-09-01	3.45271437274338