Month Percent 1986-01-01 25.9062369089586 1986-02-01 25.9910633708261 1986-03-01 26.0887824339601 1986-04-01 26.4228761977657 1986-05-01 26.5142776487995 1986-06-01 26.7632324429911 1986-07-01 26.8169581140404 1986-08-01 26.8095975981793 1986-09-01 26.8751450228169 1986-10-01 26.8667160516467 1986-11-01 26.9323601676543 1986-12-01 26.7568106999348 1987-01-01 26.7113668608796 1987-02-01 26.4801957537165 1987-03-01 26.3949565758308 1987-04-01 26.2178242415991 1987-05-01 26.2049873385124 1987-06-01 26.5725276608711 1987-07-01 26.9614913917042 1987-08-01 27.0295723795019 1987-09-01 26.9037035633684 1987-10-01 26.6026936743335 1987-11-01 26.4963961880307 1987-12-01 26.1719256168557 1988-01-01 25.9664324085311 1988-02-01 25.8192140804328 1988-03-01 25.5347775334837 1988-04-01 25.3579033579034 1988-05-01 25.0710739940431 1988-06-01 25.0373718222291 1988-07-01 25.0208363404402 1988-08-01 25.0613559668678 1988-09-01 25.0634550153823 1988-10-01 25.0000000000000 1988-11-01 24.9956646095721 1988-12-01 24.6580338388385 1989-01-01 24.2180748961312 1989-02-01 23.9175793713782 1989-03-01 23.8206128082528 1989-04-01 23.9131630954619 1989-05-01 24.2068160490719 1989-06-01 24.4462977984439 1989-07-01 24.4970209038569 1989-08-01 24.3677825878045 1989-09-01 24.2989421898693 1989-10-01 24.2266953239720 1989-11-01 24.1080774895208 1989-12-01 23.7546878746341 1990-01-01 23.5815758988151 1990-02-01 23.7330129043312 1990-03-01 24.1479037441821 1990-04-01 24.5582578372160 1990-05-01 24.5630839287116 1990-06-01 24.6847391581847 1990-07-01 24.8308314797635 1990-08-01 24.8494574217826 1990-09-01 24.9112548662194 1990-10-01 24.8779109478560 1990-11-01 24.6354759027580 1990-12-01 24.3344784835225 1991-01-01 23.9538261905500 1991-02-01 23.6264829562288 1991-03-01 23.7880172531776 1991-04-01 24.2671286164208 1991-05-01 24.6818604917272 1991-06-01 24.6407761870864 1991-07-01 24.5086834537266 1991-08-01 24.3990845278639 1991-09-01 24.4052890407874 1991-10-01 24.3838541291434 1991-11-01 24.3789997733098 1991-12-01 24.1276501286164 1992-01-01 23.9617758830853 1992-02-01 24.0928151961454 1992-03-01 24.3462063289220 1992-04-01 24.5851652094556 1992-05-01 24.7034920251068 1992-06-01 24.9285360122448 1992-07-01 24.8065519430902 1992-08-01 24.8667072114568 1992-09-01 24.6421590399499 1992-10-01 24.4797446389169 1992-11-01 23.9912731006160 1992-12-01 23.6073233914145 1993-01-01 23.1312302099214 1993-02-01 23.0759568588545 1993-03-01 22.9818747621953 1993-04-01 23.1977010713619 1993-05-01 23.1309916339626 1993-06-01 23.1638167053855 1993-07-01 22.8222797774219 1993-08-01 22.6873970389401 1993-09-01 22.5096618611851 1993-10-01 22.5501391088203 1993-11-01 22.2039076525738 1993-12-01 21.7847356316055 1994-01-01 21.5042778700038 1994-02-01 21.5483436731827 1994-03-01 22.0259177552694 1994-04-01 22.4086226766225 1994-05-01 22.8063640828013 1994-06-01 22.8621650429156 1994-07-01 22.9514046651356 1994-08-01 23.0307726091874 1994-09-01 22.7671608074506 1994-10-01 22.8639479109429 1994-11-01 22.5050485881487 1994-12-01 22.4629397334256 1995-01-01 22.0317613109305 1995-02-01 22.3214469095435 1995-03-01 22.5972246719526 1995-04-01 23.1439554520637 1995-05-01 23.5355590776625 1995-06-01 23.6952006747360 1995-07-01 23.7551846066632 1995-08-01 23.7032799001513 1995-09-01 23.9117352871815 1995-10-01 23.7500279113576 1995-11-01 23.8310568271875 1995-12-01 23.4694951408368 1996-01-01 23.4617871721295 1996-02-01 23.8268859815498 1996-03-01 24.4680122334017 1996-04-01 24.3386073084622 1996-05-01 24.4734722409142 1996-06-01 24.7445735672252 1996-07-01 25.2564518519409 1996-08-01 25.3942160974156 1996-09-01 25.2548570104898 1996-10-01 24.9041862913614 1996-11-01 24.5367097882813 1996-12-01 24.6885867155517 1997-01-01 24.6762787040824 1997-02-01 24.7569860922491 1997-03-01 24.7838662356200 1997-04-01 25.1051691008437 1997-05-01 25.5005152217428 1997-06-01 25.5889501499110 1997-07-01 25.5288156812107 1997-08-01 25.6068939218222 1997-09-01 25.7638689870958 1997-10-01 25.6990971424539 1997-11-01 25.3710366319152 1997-12-01 25.1689377398212 1998-01-01 25.2508827990341 1998-02-01 25.2085448334856 1998-03-01 25.2987722328556 1998-04-01 25.5158447388400 1998-05-01 25.5381949827902 1998-06-01 25.7250196840112 1998-07-01 25.4263012058662 1998-08-01 25.4046271185461 1998-09-01 25.3459670049541 1998-10-01 25.0625931216687 1998-11-01 24.8032378795109 1998-12-01 24.8580871215019 1999-01-01 25.2485161576071 1999-02-01 25.2030553083983 1999-03-01 25.1988925903954 1999-04-01 25.2333647015967 1999-05-01 25.5164109932925 1999-06-01 25.4494056111217 1999-07-01 25.5900358717669 1999-08-01 25.5432326579800 1999-09-01 25.5418017763993 1999-10-01 25.0513266098915 1999-11-01 25.1695976132650 1999-12-01 25.2402281044431 2000-01-01 25.8204622385617 2000-02-01 25.8134170695915 2000-03-01 25.9058031709160 2000-04-01 25.5879893717832 2000-05-01 25.9268462287330 2000-06-01 26.1478704347955 2000-07-01 26.3961724820516 2000-08-01 26.2491477010965 2000-09-01 26.1249627495778 2000-10-01 26.3419777054913 2000-11-01 26.3803680981595 2000-12-01 26.4209002161851 2001-01-01 26.7476265447094 2001-02-01 26.9649381239563 2001-03-01 26.9898051089087 2001-04-01 26.8601314785893 2001-05-01 26.5795538548506 2001-06-01 26.5540144771381 2001-07-01 26.4601138958331 2001-08-01 26.3116847561788 2001-09-01 26.3389082955294 2001-10-01 26.1664138172482 2001-11-01 26.4324846460298 2001-12-01 26.3948390419042 2002-01-01 26.7068936276566 2002-02-01 26.7394882537782 2002-03-01 26.7723243504738 2002-04-01 26.8049182423890 2002-05-01 27.0126029262619 2002-06-01 27.2932015318995 2002-07-01 27.4407698505817 2002-08-01 27.3010235392874 2002-09-01 27.1039516844284 2002-10-01 26.9584548873502 2002-11-01 26.9094177520070 2002-12-01 27.0152493994333 2003-01-01 26.9063634011789 2003-02-01 26.9068125421784 2003-03-01 26.9527318569802 2003-04-01 26.8151268829090 2003-05-01 26.7960056764362 2003-06-01 27.0042259863521 2003-07-01 27.2638452253729 2003-08-01 27.3156548958130 2003-09-01 27.4707303539240 2003-10-01 27.2313763810087 2003-11-01 27.1980999060601 2003-12-01 27.3292159954971 2004-01-01 27.5120236171769 2004-02-01 27.5958947210024 2004-03-01 27.5243947128455 2004-04-01 27.6760915312204 2004-05-01 27.6579355464840 2004-06-01 27.9714050059869 2004-07-01 27.7838912356679 2004-08-01 27.7870704977053 2004-09-01 27.3690826645008 2004-10-01 27.3047942146518 2004-11-01 26.9466942419954 2004-12-01 26.8908057177804 2005-01-01 27.2058650868995 2005-02-01 27.3250718481093 2005-03-01 27.4588181335797 2005-04-01 27.3467459335647 2005-05-01 27.4752833614296 2005-06-01 27.5097488963435 2005-07-01 27.5081115512471 2005-08-01 27.5205023681126 2005-09-01 27.5953477583750 2005-10-01 27.7803262779440 2005-11-01 27.9823379237955 2005-12-01 27.7831842149688 2006-01-01 27.6339646113736 2006-02-01 27.3492376539281 2006-03-01 27.8213828340573 2006-04-01 27.9631933174618 2006-05-01 28.4778603855517 2006-06-01 28.5773907035865 2006-07-01 28.8110279168614 2006-08-01 28.7079837366751 2006-09-01 28.5833105292221 2006-10-01 28.4980499168401 2006-11-01 28.7771712022909 2006-12-01 28.7017971155460 2007-01-01 28.4586872119995 2007-02-01 28.2335197121075 2007-03-01 28.2851463146079 2007-04-01 28.6381109236180 2007-05-01 28.8542460705241 2007-06-01 29.1040497360524 2007-07-01 29.0382369619400 2007-08-01 29.0323151626250 2007-09-01 28.9746840060114 2007-10-01 28.8641693698181 2007-11-01 28.3835243650800 2007-12-01 27.8350126184384 2008-01-01 27.6744763464771 2008-02-01 27.7288954447076 2008-03-01 28.0021343384077 2008-04-01 28.2077835708456 2008-05-01 28.1966595308676 2008-06-01 28.2102129755204 2008-07-01 28.3551802399502 2008-08-01 28.5591918560342 2008-09-01 28.4986169401293 2008-10-01 28.2976373604702 2008-11-01 28.3742911480735 2008-12-01 28.4601216386112 2009-01-01 28.4720008458954 2009-02-01 28.4874878050541 2009-03-01 28.4725145817669 2009-04-01 28.6709022865432 2009-05-01 28.6691566192019 2009-06-01 28.9281879230236 2009-07-01 29.0767453256848 2009-08-01 29.1392910003249 2009-09-01 29.3085133823989 2009-10-01 29.5400279596660 2009-11-01 29.7272821378075 2009-12-01 29.6300910129279 2010-01-01 29.3397598598523 2010-02-01 28.4783145547152 2010-03-01 28.5300545942730 2010-04-01 28.4003312440739 2010-05-01 28.2153364670727 2010-06-01 28.1340857247242 2010-07-01 28.0121502621261 2010-08-01 27.4206861488468 2010-09-01 27.6011317580485 2010-10-01 27.7127425582873 2010-11-01 27.5372334015227 2010-12-01 26.8746286393345 2011-01-01 26.5481756944899 2011-02-01 26.8046203386688 2011-03-01 27.0584967771604 2011-04-01 27.5810637111052 2011-05-01 27.2077969262816 2011-06-01 27.4253220785386 2011-07-01 27.1583407321507 2011-08-01 27.2318466419756 2011-09-01 27.7477488331885 2011-10-01 27.9826366327341 2011-11-01 27.9132893100278 2011-12-01 27.4653000726103 2012-01-01 27.1962602819771 2012-02-01 27.4899444550852 2012-03-01 27.6785552161203 2012-04-01 27.6277217712597 2012-05-01 28.0374751647670 2012-06-01 28.6462029649680 2012-07-01 28.9066164134057 2012-08-01 28.6002877176145 2012-09-01 28.3676256383490 2012-10-01 28.4022012420285 2012-11-01 28.1683840905619 2012-12-01 27.7638036951170 2013-01-01 27.7224534143625 2013-02-01 27.9155368322742 2013-03-01 27.7382566432781 2013-04-01 27.8535332170062 2013-05-01 28.2043917333080 2013-06-01 28.5395272919966 2013-07-01 28.5727342322645 2013-08-01 28.6305737323845 2013-09-01 28.5684303392929 2013-10-01 28.4790050829877 2013-11-01 28.0326642166824 2013-12-01 27.6189063143500 2014-01-01 27.5574369857576 2014-02-01 27.8218038397622 2014-03-01 28.0100349805926 2014-04-01 28.3411800133294 2014-05-01 28.4287254069479 2014-06-01 29.0084028924517 2014-07-01 29.0618881164203 2014-08-01 29.2236177532227 2014-09-01 29.1243727540909 2014-10-01 28.7014985110130 2014-11-01 28.2116992424683 2014-12-01 28.0019540587494 2015-01-01 28.1684032812762 2015-02-01 28.1449013142409 2015-03-01 28.3114762564436 2015-04-01 28.3818953886550 2015-05-01 28.6564074916869 2015-06-01 28.7677654029048 2015-07-01 28.8315549484585 2015-08-01 28.5699979047245 2015-09-01 28.8135374219142 2015-10-01 28.6677977683324 2015-11-01 28.6974396991504 2015-12-01 28.0658750452542 2016-01-01 28.0398339407473 2016-02-01 28.3542416541846 2016-03-01 28.2849626885944 2016-04-01 28.5881368857018 2016-05-01 28.7788133859953 2016-06-01 28.9291689458303 2016-07-01 28.9364086941465 2016-08-01 28.8281869719882 2016-09-01 28.9790777833485 2016-10-01 28.8098710582683 2016-11-01 28.9706587120433 2016-12-01 28.6137703634985 2017-01-01 28.7597716233464 2017-02-01 28.4011446134287 2017-03-01 28.6975124192047 2017-04-01 28.5732857068922 2017-05-01 28.7429036966534 2017-06-01 28.9942270349955 2017-07-01 29.2615372385879 2017-08-01 29.0656245073224 2017-09-01 29.1567233663766 2017-10-01 28.8567744495788 2017-11-01 28.8821416346274 2017-12-01 28.5440408917953 2018-01-01 28.6763217759494 2018-02-01 29.0456334400116 2018-03-01 29.2556369850589 2018-04-01 29.1116588404842 2018-05-01 29.0259958840272 2018-06-01 29.1683801545576 2018-07-01 29.4652763007295 2018-08-01 29.8143925309305