Month Percent 1978-01-01 53.7365716954694 1978-02-01 53.4189031505251 1978-03-01 51.9971969166083 1978-04-01 50.3970107426436 1978-05-01 48.6719478098788 1978-06-01 48.0576878343801 1978-07-01 49.2196599114838 1978-08-01 49.7672253258845 1978-09-01 49.4413407821229 1978-10-01 49.3609109923309 1978-11-01 50.3600464576074 1978-12-01 51.3588850174216 1979-01-01 52.2273781902552 1979-02-01 52.7340129749768 1979-03-01 51.7712433433665 1979-04-01 49.8380379453956 1979-05-01 48.5694508537148 1979-06-01 48.5681293302540 1979-07-01 48.7979657882570 1979-08-01 48.9616982002769 1979-09-01 49.1126987785204 1979-10-01 48.8254260709350 1979-11-01 50.0689972401104 1979-12-01 51.6203171684670 1980-01-01 52.8249885163068 1980-02-01 52.6968097314666 1980-03-01 51.5248796147673 1980-04-01 49.4147349093413 1980-05-01 48.5910652920962 1980-06-01 48.2269503546099 1980-07-01 48.3420992453693 1980-08-01 48.6764034687357 1980-09-01 48.6671223513329 1980-10-01 49.2822966507177 1980-11-01 50.1025757921131 1980-12-01 51.2411751309497 1981-01-01 52.6339691189827 1981-02-01 52.8944381384790 1981-03-01 51.6004540295119 1981-04-01 49.2175096393740 1981-05-01 48.4353741496599 1981-06-01 48.5837298889644 1981-07-01 48.8103331067301 1981-08-01 49.2760180995475 1981-09-01 49.0728177295341 1981-10-01 48.9592760180995 1981-11-01 49.2297236067059 1981-12-01 50.0906618313690 1982-01-01 51.6828552066862 1982-02-01 51.8752824220515 1982-03-01 50.4626495147822 1982-04-01 49.0651047533228 1982-05-01 47.9082321187584 1982-06-01 48.1231737469094 1982-07-01 48.6966292134832 1982-08-01 49.1149451041900 1982-09-01 48.7908643081057 1982-10-01 48.4245810055866 1982-11-01 49.1286863270777 1982-12-01 49.5189080331170 1983-01-01 50.5366726296959 1983-02-01 50.6034868126956 1983-03-01 49.1957104557641 1983-04-01 47.6116071428571 1983-05-01 46.6339723584485 1983-06-01 47.0037870349744 1983-07-01 47.2500556668893 1983-08-01 47.4538581276406 1983-09-01 47.2351765489674 1983-10-01 47.1593430980914 1983-11-01 48.1925038811266 1983-12-01 49.6674057649667 1984-01-01 51.0407440212578 1984-02-01 50.9521700620018 1984-03-01 49.3250719185660 1984-04-01 47.5685234305924 1984-05-01 46.9536423841060 1984-06-01 46.5696007059343 1984-07-01 46.9239250275634 1984-08-01 47.4460590048437 1984-09-01 46.8763748350198 1984-10-01 46.7575291272807 1984-11-01 47.9674796747968 1984-12-01 49.3848857644991 1985-01-01 50.1864443957008 1985-02-01 50.1315789473684 1985-03-01 49.1670320035072 1985-04-01 47.3730297723292 1985-05-01 46.6768692610407 1985-06-01 46.8982088248143 1985-07-01 47.0524017467249 1985-08-01 47.3730106823632 1985-09-01 47.1139185362666 1985-10-01 47.2790596430126 1985-11-01 48.2713633398565 1985-12-01 50.0000000000000 1986-01-01 50.0868432479375 1986-02-01 50.0651324359531 1986-03-01 49.0561944022564 1986-04-01 47.3342002600780 1986-05-01 46.8729712183510 1986-06-01 46.6162162162162 1986-07-01 46.8439256377000 1986-08-01 47.4536037980147 1986-09-01 47.5204829667960 1986-10-01 47.5452196382429 1986-11-01 48.2892188508715 1986-12-01 49.3758071459320 1987-01-01 50.2148689299527 1987-02-01 50.2470461868958 1987-03-01 49.0233955784503 1987-04-01 47.2430808839305 1987-05-01 46.3252624812513 1987-06-01 46.5539383561644 1987-07-01 47.1758664955071 1987-08-01 47.4044007690664 1987-09-01 47.2459436379163 1987-10-01 47.4728087012156 1987-11-01 47.8483170004261 1987-12-01 48.4867860187553 1988-01-01 49.4895789025946 1988-02-01 49.7979153371623 1988-03-01 48.6607142857143 1988-04-01 46.9101720110427 1988-05-01 46.0983884648007 1988-06-01 46.4376590330789 1988-07-01 46.5239508266214 1988-08-01 46.9642479373810 1988-09-01 46.9469680963448 1988-10-01 47.2128378378378 1988-11-01 47.9122733024040 1988-12-01 48.3544303797468 1989-01-01 49.2207245155855 1989-02-01 49.1253951527924 1989-03-01 47.9469361970941 1989-04-01 46.3157894736842 1989-05-01 45.3991596638655 1989-06-01 45.2350965575147 1989-07-01 45.6854923367625 1989-08-01 46.2908633696563 1989-09-01 46.2955211385517 1989-10-01 46.2986198243413 1989-11-01 46.6680593273449 1989-12-01 47.3970311519967 1990-01-01 48.2463465553236 1990-02-01 48.0058467320944 1990-03-01 46.7960759757879 1990-04-01 45.4109303295786 1990-05-01 44.8053300020820 1990-06-01 44.8605909280067 1990-07-01 45.0853810912120 1990-08-01 45.6151288445553 1990-09-01 45.4545454545455 1990-10-01 45.8618543870566 1990-11-01 45.9991708126036 1990-12-01 46.6818747407715 1991-01-01 47.4316487158244 1991-02-01 47.4404145077720 1991-03-01 46.6059602649007 1991-04-01 45.0578990901572 1991-05-01 44.1461903778650 1991-06-01 43.9628482972136 1991-07-01 44.5982235075398 1991-08-01 44.7607260726073 1991-09-01 44.7991761071061 1991-10-01 45.0483837759934 1991-11-01 45.1440329218107 1991-12-01 45.5518945634267 1992-01-01 47.2970195272354 1992-02-01 46.8338815789474 1992-03-01 46.1854822126260 1992-04-01 45.0205761316872 1992-05-01 44.1454396055875 1992-06-01 44.0319934372436 1992-07-01 45.0738916256158 1992-08-01 45.0707112113138 1992-09-01 44.8515864892528 1992-10-01 44.7944364900798 1992-11-01 45.0030656039240 1992-12-01 45.7616707616708 1993-01-01 47.3329245861435 1993-02-01 47.8127555192150 1993-03-01 46.8219905988146 1993-04-01 45.2225398121682 1993-05-01 44.6348429212566 1993-06-01 44.5758564437194 1993-07-01 45.0336528655925 1993-08-01 45.3360488798371 1993-09-01 45.3102746693794 1993-10-01 45.2196908055330 1993-11-01 45.5801666327982 1993-12-01 46.1037639877925 1994-01-01 47.2668156878683 1994-02-01 47.6006506710045 1994-03-01 46.5461194636327 1994-04-01 44.7876447876448 1994-05-01 44.3587662337662 1994-06-01 44.5436105476673 1994-07-01 45.1593261619647 1994-08-01 45.6314615852422 1994-09-01 45.7270149858242 1994-10-01 45.5668016194332 1994-11-01 45.9935248887090 1994-12-01 46.9205834683955 1995-01-01 47.5217479263605 1995-02-01 47.4078574321588 1995-03-01 46.5370595382746 1995-04-01 45.2207371405427 1995-05-01 44.8331648129424 1995-06-01 44.6645109135004 1995-07-01 45.1012145748988 1995-08-01 45.6016177957533 1995-09-01 45.0485044462409 1995-10-01 45.7685316097758 1995-11-01 46.3370332996973 1995-12-01 46.8364665453810 1996-01-01 47.5873208156673 1996-02-01 47.8577202910267 1996-03-01 46.3838383838384 1996-04-01 45.0889248181083 1996-05-01 44.7830474268416 1996-06-01 44.2517144009681 1996-07-01 44.3861066235864 1996-08-01 45.2894896106516 1996-09-01 44.7713076768084 1996-10-01 45.0956696878147 1996-11-01 45.9339774557166 1996-12-01 46.6827989514015 1997-01-01 46.9748743718593 1997-02-01 46.6291004226202 1997-03-01 45.9372485921158 1997-04-01 44.7818218379248 1997-05-01 44.1767068273092 1997-06-01 43.7173825772782 1997-07-01 43.9597989949749 1997-08-01 44.6586345381526 1997-09-01 44.3753759775416 1997-10-01 44.3776307877330 1997-11-01 45.5310621242485 1997-12-01 45.9638554216867 1998-01-01 46.0613349368611 1998-02-01 46.6011630238620 1998-03-01 45.7097032878909 1998-04-01 44.5981158548807 1998-05-01 43.8902243589744 1998-06-01 44.0728874649580 1998-07-01 44.5802444399920 1998-08-01 44.5756605284227 1998-09-01 44.8379351740696 1998-10-01 44.9020391843263 1998-11-01 45.5817672930828 1998-12-01 46.4650510715001 1999-01-01 46.9800000000000 1999-02-01 47.0588235294118 1999-03-01 45.8983593437375 1999-04-01 44.6178471388555 1999-05-01 44.2622950819672 1999-06-01 44.7000000000000 1999-07-01 45.0000000000000 1999-08-01 44.8020791683327 1999-09-01 44.9040767386091 1999-10-01 45.3165568204514 1999-11-01 45.6469648562300 1999-12-01 46.5520687587448 2000-01-01 46.9155520063885 2000-02-01 47.1739564609547 2000-03-01 46.5520687587448 2000-04-01 45.0800000000000 2000-05-01 44.6974236069503 2000-06-01 44.7793970852466 2000-07-01 45.0329802118729 2000-08-01 45.3256092688774 2000-09-01 45.2675718849840 2000-10-01 45.1207343843544 2000-11-01 45.3221623778177 2000-12-01 46.2183196966673 2001-01-01 46.3273453093812 2001-02-01 46.1492298459692 2001-03-01 46.0215913634546 2001-04-01 45.3709258148370 2001-05-01 44.7662804634439 2001-06-01 44.6574795286599 2001-07-01 45.0729562262642 2001-08-01 45.4454654414702 2001-09-01 45.5180674785386 2001-10-01 45.4309656823623 2001-11-01 45.1355661881978 2001-12-01 46.1968456777800 2002-01-01 47.0011995201919 2002-02-01 46.9069069069069 2002-03-01 46.3155786944333 2002-04-01 45.8133012820513 2002-05-01 45.4672803682209 2002-06-01 45.2800000000000 2002-07-01 45.5546655987185 2002-08-01 45.6256256256256 2002-09-01 45.6291258251650 2002-10-01 45.5835331734612 2002-11-01 45.5982392957183 2002-12-01 46.4729458917836 2003-01-01 47.1354166666667 2003-02-01 47.3409592614891 2003-03-01 46.2602767194706 2003-04-01 45.6787647884500 2003-05-01 45.2924679487180 2003-06-01 44.7647647647648 2003-07-01 45.1612903225806 2003-08-01 45.6913827655311 2003-09-01 45.6221198156682 2003-10-01 45.5620116209176 2003-11-01 45.9827689841715 2003-12-01 46.4257028112450 2004-01-01 47.0104333868379 2004-02-01 46.8367141996385 2004-03-01 46.0256924929747 2004-04-01 45.4052969502408 2004-05-01 45.2337949026691 2004-06-01 45.2572347266881 2004-07-01 45.0050251256281 2004-08-01 44.8310539018504 2004-09-01 45.0724054706356 2004-10-01 45.1859296482412 2004-11-01 46.1105527638191 2004-12-01 46.5270787195490 2005-01-01 46.4802896218825 2005-02-01 46.6693499698128 2005-03-01 46.1739830849778 2005-04-01 45.0494051220004 2005-05-01 44.1377921031426 2005-06-01 44.6280991735537 2005-07-01 44.5161290322581 2005-08-01 44.7469247832224 2005-09-01 44.5452712240371 2005-10-01 44.5744251714401 2005-11-01 45.5223880597015 2005-12-01 46.0932768019382 2006-01-01 46.1212121212121 2006-02-01 46.1258345134534 2006-03-01 45.9251769464105 2006-04-01 45.0567260940032 2006-05-01 44.1295546558704 2006-06-01 44.2669362992922 2006-07-01 44.5231828305325 2006-08-01 44.3589224225238 2006-09-01 44.1968806967794 2006-10-01 44.0956046181892 2006-11-01 44.4826888034015 2006-12-01 45.4176804541768 2007-01-01 46.1804144656644 2007-02-01 45.8629802805448 2007-03-01 45.1586655817738 2007-04-01 44.1775244299674 2007-05-01 43.6304436304436 2007-06-01 43.9178193653377 2007-07-01 44.4421824104235 2007-08-01 44.3086947668499 2007-09-01 44.2769857433809 2007-10-01 44.2452638011815 2007-11-01 43.9869547492866 2007-12-01 44.6075433231396 2008-01-01 45.4174321290059 2008-02-01 45.6570611077049 2008-03-01 44.8783479860969 2008-04-01 43.6899161382696 2008-05-01 43.5787321063395 2008-06-01 43.5147299509002 2008-07-01 44.0580895888730 2008-08-01 44.1441441441441 2008-09-01 44.1236691236691 2008-10-01 44.4899631298648 2008-11-01 44.0869030539045 2008-12-01 44.5469454694547 2009-01-01 44.7341408335044 2009-02-01 44.5973705834018 2009-03-01 44.5426515930113 2009-04-01 43.5944889985606 2009-05-01 43.3888546164919 2009-06-01 43.5122352457331 2009-07-01 43.7795599424224 2009-08-01 43.3127572016461 2009-09-01 43.0541263634493 2009-10-01 43.8748198476426 2009-11-01 43.8336421659461 2009-12-01 44.3345694272765 2010-01-01 44.4811223437178 2010-02-01 44.4444444444444 2010-03-01 44.2744935923936 2010-04-01 43.4153400868307 2010-05-01 43.0845565433120 2010-06-01 43.5743801652893 2010-07-01 43.5780765253361 2010-08-01 43.2767894083575 2010-09-01 42.6945364238411 2010-10-01 43.0227743271222 2010-11-01 43.4962717481359 2010-12-01 44.0323249067551 2011-01-01 44.1725425134799 2011-02-01 44.0083073727934 2011-03-01 44.2754725179231 2011-04-01 43.4905455335797 2011-05-01 43.2732014779396 2011-06-01 43.3355077190694 2011-07-01 43.7921287236356 2011-08-01 43.8045375218150 2011-09-01 43.3277731442869 2011-10-01 43.3395872420263 2011-11-01 43.3903252710592 2011-12-01 44.0250260688217 2012-01-01 44.6495230194940 2012-02-01 44.1677044416770 2012-03-01 44.0797673452430 2012-04-01 43.1421446384040 2012-05-01 42.8660565723794 2012-06-01 43.1274693283427 2012-07-01 43.3354127677272 2012-08-01 43.2584269662921 2012-09-01 43.0801248699272 2012-10-01 42.9760665972945 2012-11-01 43.0833333333333 2012-12-01 43.7799541571161 2013-01-01 43.5490605427975 2013-02-01 43.0541048673491 2013-03-01 42.9228517666736 2013-04-01 42.0326223337516 2013-05-01 41.9037656903766 2013-06-01 42.3849372384937 2013-07-01 42.6061493411420 2013-08-01 42.2682569575225 2013-09-01 41.8410041841004 2013-10-01 41.4766785191383 2013-11-01 41.3894120108809 2013-12-01 41.9962335216572 2014-01-01 42.6865046102263 2014-02-01 42.5424795468848 2014-03-01 42.3803526448363 2014-04-01 41.8013856812933 2014-05-01 41.2888329135180 2014-06-01 41.1332633788038 2014-07-01 41.4183801930340 2014-08-01 41.6719176643562 2014-09-01 41.1048099138836 2014-10-01 40.9625893232451 2014-11-01 41.0466582597730 2014-12-01 41.2741799831791 2015-01-01 41.8614445146347 2015-02-01 41.7580101180438 2015-03-01 41.7790893760540 2015-04-01 41.3327709827077 2015-05-01 40.8016877637131 2015-06-01 40.3667790893760 2015-07-01 40.8189109328831 2015-08-01 40.8831607859708 2015-09-01 40.1267159450898 2015-10-01 40.4012671594509 2015-11-01 40.8409042890344 2015-12-01 40.8081235455892 2016-01-01 40.3683319220999 2016-02-01 40.8271474019088 2016-03-01 40.8695652173913 2016-04-01 40.2760084925690 2016-05-01 40.0254668930390 2016-06-01 39.2402376910017 2016-07-01 39.2606755895475 2016-08-01 39.4003827344248 2016-09-01 39.1572675037242 2016-10-01 39.2765957446809 2016-11-01 39.5571641473281 2016-12-01 39.4243070362473 2017-01-01 39.5398380911802 2017-02-01 40.0085306035402 2017-03-01 39.8847631241997 2017-04-01 38.9019440290536 2017-05-01 38.3432963279249 2017-06-01 37.8285958538149 2017-07-01 38.1460914139257 2017-08-01 38.1145788798632 2017-09-01 37.8153056861907 2017-10-01 37.9384088964927 2017-11-01 37.9922945205479 2017-12-01 38.1748071979434 2018-01-01 38.2106844024887 2018-02-01 37.8784625295254 2018-03-01 37.1158392434988 2018-04-01 36.3636363636364 2018-05-01 36.6372823048807 2018-06-01 36.6917293233083 2018-07-01 36.4516129032258 2018-08-01 36.2128392934080 2018-09-01 36.0111996553952