Month Percent 1968-01-01 97.2758791480931 1968-02-01 96.9367588932806 1968-03-01 97.2839506172840 1968-04-01 97.5369458128079 1968-05-01 97.4901574803150 1968-06-01 97.7897838899804 1968-07-01 97.9391560353288 1968-08-01 97.8973105134474 1968-09-01 98.2404692082111 1968-10-01 98.1960019502682 1968-11-01 97.8599221789883 1968-12-01 97.3748176956733 1969-01-01 97.0417070805044 1969-02-01 96.9975786924940 1969-03-01 97.1483808603190 1969-04-01 97.6362759286059 1969-05-01 97.7382098171319 1969-06-01 97.9326923076923 1969-07-01 97.8396543446951 1969-08-01 97.6053639846743 1969-09-01 97.9904306220096 1969-10-01 97.5155279503106 1969-11-01 97.3282442748092 1969-12-01 97.3307912297426 1970-01-01 97.2354623450906 1970-02-01 97.0504281636536 1970-03-01 97.4809885931559 1970-04-01 97.8642619838633 1970-05-01 97.5355450236967 1970-06-01 97.3970657832466 1970-07-01 97.3024136299101 1970-08-01 97.5390440132513 1970-09-01 97.6403964134026 1970-10-01 97.5932043416706 1970-11-01 97.8332548280735 1970-12-01 97.7819726285984 1971-01-01 97.5897920604915 1971-02-01 97.3572439830109 1971-03-01 98.0642115203022 1971-04-01 98.2083922677982 1971-05-01 97.6481655691439 1971-06-01 97.5140712945591 1971-07-01 97.6123595505618 1971-08-01 97.3807296538821 1971-09-01 97.6657329598506 1971-10-01 97.7188081936685 1971-11-01 97.8169995355318 1971-12-01 97.7251624883937 1972-01-01 97.5496994914471 1972-02-01 97.4347228584517 1972-03-01 97.3491773308958 1972-04-01 97.8122151321787 1972-05-01 97.7272727272727 1972-06-01 97.6891708201178 1972-07-01 97.8036754818467 1972-08-01 97.8115230013399 1972-09-01 97.8628673196794 1972-10-01 98.0008884940027 1972-11-01 97.6053215077605 1972-12-01 97.4734042553192 1973-01-01 97.5760246804760 1973-02-01 97.6274165202109 1973-03-01 97.6367614879650 1973-04-01 97.9011805859204 1973-05-01 98.0400696864111 1973-06-01 97.9591836734694 1973-07-01 98.0502599653380 1973-08-01 97.8815391266753 1973-09-01 97.8007761966365 1973-10-01 97.9381443298969 1973-11-01 97.9836979836980 1973-12-01 97.6047904191617 1974-01-01 97.4457215836526 1974-02-01 97.3684210526316 1974-03-01 97.8831498729890 1974-04-01 97.9298690325306 1974-05-01 97.8544383676904 1974-06-01 97.9026845637584 1974-07-01 97.5691533948030 1974-08-01 97.7861319966583 1974-09-01 97.7481234361968 1974-10-01 97.7944236371203 1974-11-01 98.0058163689240 1974-12-01 97.6368159203980 1975-01-01 97.1074380165289 1975-02-01 97.1581548599671 1975-03-01 97.4475092630712 1975-04-01 97.3727422003284 1975-05-01 97.4631751227496 1975-06-01 97.5938009787928 1975-07-01 97.4327628361858 1975-08-01 97.4796747967480 1975-09-01 97.7291159772912 1975-10-01 97.7714748784441 1975-11-01 97.8181818181818 1975-12-01 97.9023799919322 1976-01-01 97.1853638922396 1976-02-01 97.2679791080755 1976-03-01 97.3113964686998 1976-04-01 97.4358974358974 1976-05-01 97.7218225419664 1976-06-01 97.6874003189793 1976-07-01 97.6475279106858 1976-08-01 97.5328292877039 1976-09-01 97.4216580721936 1976-10-01 97.8200554894966 1976-11-01 97.9761904761905 1976-12-01 97.7839335180056 1977-01-01 97.1992110453649 1977-02-01 97.1620023649980 1977-03-01 97.3611658133123 1977-04-01 97.5609756097561 1977-05-01 97.6461357395057 1977-06-01 97.4137931034483 1977-07-01 97.4519796158369 1977-08-01 97.3025801407350 1977-09-01 97.3078423722200 1977-10-01 97.5058456742011 1977-11-01 97.5467289719626 1977-12-01 97.4688473520249 1978-01-01 97.1885982038266 1978-02-01 97.3489278752436 1978-03-01 97.3879142300195 1978-04-01 97.5058456742011 1978-05-01 97.7096273291926 1978-06-01 97.7105161039969 1978-07-01 97.6338246702870 1978-08-01 97.5203409531190 1978-09-01 97.4071207430341 1978-10-01 97.3714727483572 1978-11-01 97.7193660610746 1978-12-01 97.4468085106383 1979-01-01 97.1428571428571 1979-02-01 97.2190034762456 1979-03-01 97.3004242190513 1979-04-01 97.6475125337447 1979-05-01 97.6493256262042 1979-06-01 97.9591836734694 1979-07-01 98.1895223420647 1979-08-01 97.9214780600462 1979-09-01 97.6949673453707 1979-10-01 97.6949673453707 1979-11-01 97.8902953586498 1979-12-01 97.6190476190476 1980-01-01 97.3906369915579 1980-02-01 97.2360844529750 1980-03-01 97.1987720644666 1980-04-01 97.5469528555002 1980-05-01 97.4378585086042 1980-06-01 97.7064220183486 1980-07-01 97.8185993111366 1980-08-01 97.5525812619503 1980-09-01 97.6299694189602 1980-10-01 97.8642257818459 1980-11-01 97.7854142802596 1980-12-01 97.5535168195719 1981-01-01 97.5190839694656 1981-02-01 97.6699770817418 1981-03-01 97.7489507821442 1981-04-01 97.7845683728036 1981-05-01 97.6344906524227 1981-06-01 97.7506671749905 1981-07-01 97.6753048780488 1981-08-01 97.4105102817974 1981-09-01 97.2222222222222 1981-10-01 97.3353635325466 1981-11-01 97.2592310620480 1981-12-01 97.1766501335368 1982-01-01 97.2550514677850 1982-02-01 97.4466463414634 1982-03-01 97.7862595419847 1982-04-01 97.9801829268293 1982-05-01 97.8293983244478 1982-06-01 97.7549467275495 1982-07-01 97.5637609440426 1982-08-01 97.5294564804257 1982-09-01 97.3784194528876 1982-10-01 97.5275770254850 1982-11-01 97.7549467275495 1982-12-01 97.7160258850400 1983-01-01 97.5665399239544 1983-02-01 97.5266362252664 1983-03-01 97.5963372758489 1983-04-01 97.7134146341464 1983-05-01 97.8285714285714 1983-06-01 97.8691019786910 1983-07-01 97.8302245907880 1983-08-01 97.9095400988217 1983-09-01 97.8335233751425 1983-10-01 97.7160258850400 1983-11-01 97.7913175932978 1983-12-01 97.5619047619048 1984-01-01 97.3714285714286 1984-02-01 97.4105102817974 1984-03-01 97.5581838992751 1984-04-01 97.5600457491422 1984-05-01 97.6761904761905 1984-06-01 97.9817212490480 1984-07-01 97.7896341463415 1984-08-01 97.9055597867479 1984-09-01 97.7938379612020 1984-10-01 97.7186311787072 1984-11-01 97.8691019786910 1984-12-01 97.5990853658536 1985-01-01 97.6018271792920 1985-02-01 97.1820258948972 1985-03-01 97.2942073170732 1985-04-01 97.5228658536585 1985-05-01 97.6027397260274 1985-06-01 97.7515243902439 1985-07-01 97.6000000000000 1985-08-01 97.5219214639726 1985-09-01 97.5275770254850 1985-10-01 97.3764258555133 1985-11-01 97.3764258555133 1985-12-01 97.2201066260472 1986-01-01 97.2592310620480 1986-02-01 96.9939117199391 1986-03-01 97.2931757529546 1986-04-01 97.5581838992751 1986-05-01 97.4741676234214 1986-06-01 97.4780282766526 1986-07-01 97.6362943194815 1986-08-01 97.9047619047619 1986-09-01 97.7177634081400 1986-10-01 97.5247524752475 1986-11-01 97.2169271826153 1986-12-01 97.1025543271064 1987-01-01 97.0655487804878 1987-02-01 97.1395881006865 1987-03-01 97.3323170731707 1987-04-01 97.4085365853659 1987-05-01 97.3644003055768 1987-06-01 97.3644003055768 1987-07-01 97.7116704805492 1987-08-01 97.8658536585366 1987-09-01 97.7480916030534 1987-10-01 97.8235967926690 1987-11-01 97.4417716685758 1987-12-01 97.4407944996180 1988-01-01 97.4446987032799 1988-02-01 97.3674170164060 1988-03-01 97.3996175908222 1988-04-01 97.5553857906799 1988-05-01 97.4446987032799 1988-06-01 97.7072984333206 1988-07-01 97.9389312977099 1988-08-01 97.9015642884395 1988-09-01 97.5972540045766 1988-10-01 97.6753048780488 1988-11-01 97.6770753998477 1988-12-01 97.4809160305344 1989-01-01 97.3664122137404 1989-02-01 97.5572519083970 1989-03-01 97.5945017182130 1989-04-01 97.7837218188766 1989-05-01 97.8642257818459 1989-06-01 97.9801829268293 1989-07-01 97.9824895317853 1989-08-01 97.8310502283105 1989-09-01 97.6797261316090 1989-10-01 97.4904942965780 1989-11-01 97.5628332063976 1989-12-01 97.5266362252664 1990-01-01 97.4866717440975 1990-02-01 97.5228658536585 1990-03-01 97.6371951219512 1990-04-01 97.7463712757830 1990-05-01 97.8343465045593 1990-06-01 97.7566539923954 1990-07-01 97.8335233751425 1990-08-01 97.5674648422653 1990-09-01 97.7617602427921 1990-10-01 97.9529946929492 1990-11-01 97.7600607441154 1990-12-01 97.5683890577508 1991-01-01 97.4885844748858 1991-02-01 97.6761904761905 1991-03-01 97.8699125142640 1991-04-01 97.9428571428571 1991-05-01 97.8674790555979 1991-06-01 97.7515243902439 1991-07-01 97.6380952380952 1991-08-01 97.5990853658536 1991-09-01 97.8310502283105 1991-10-01 98.0205557670346 1991-11-01 98.0556614563477 1991-12-01 98.0519480519480 1992-01-01 98.0512036683225 1992-02-01 98.1679389312977 1992-03-01 97.9778710415872 1992-04-01 98.0129919755445 1992-05-01 97.9794128860084 1992-06-01 97.7549467275495 1992-07-01 97.7946768060836 1992-08-01 97.6434815659445 1992-09-01 97.6425855513308 1992-10-01 98.0995819080198 1992-11-01 98.0243161094225 1992-12-01 97.9832572298326 1993-01-01 97.7194982896237 1993-02-01 97.6434815659445 1993-03-01 97.5693125712116 1993-04-01 97.9840243438570 1993-05-01 98.1397114654518 1993-06-01 97.9886148007590 1993-07-01 97.6515151515152 1993-08-01 97.6163450624291 1993-09-01 98.0718336483932 1993-10-01 98.1831945495836 1993-11-01 97.9591836734694 1993-12-01 97.8080120937264 1994-01-01 97.5084937712344 1994-02-01 97.3962264150943 1994-03-01 97.4707436768592 1994-04-01 97.2411186696901 1994-05-01 97.7392614920874 1994-06-01 97.6647834274953 1994-07-01 97.4407226194957 1994-08-01 97.5930801053028 1994-09-01 97.7827884254040 1994-10-01 97.7811207220760 1994-11-01 97.3308270676692 1994-12-01 97.4812030075188 1995-01-01 96.9184517098835 1995-02-01 97.0300751879699 1995-03-01 97.4436090225564 1995-04-01 97.2901768912307 1995-05-01 97.4830954169797 1995-06-01 97.6717987232445 1995-07-01 97.8603603603604 1995-08-01 97.8611632270169 1995-09-01 97.9377577802775 1995-10-01 97.8627671541057 1995-11-01 97.5280898876404 1995-12-01 97.6377952755906 1996-01-01 97.1524915698764 1996-02-01 97.2232645403377 1996-03-01 97.6333583771600 1996-04-01 97.6700488538144 1996-05-01 97.8260869565217 1996-06-01 97.9018358935931 1996-07-01 98.0509745127436 1996-08-01 98.0891719745223 1996-09-01 97.8667664670659 1996-10-01 97.7910894795956 1996-11-01 97.6404494382022 1996-12-01 97.7127859017623 1997-01-01 97.6839745984311 1997-02-01 97.7196261682243 1997-03-01 97.8333955920807 1997-04-01 97.9057591623037 1997-05-01 97.8731343283582 1997-06-01 97.9120059656972 1997-07-01 97.8017883755589 1997-08-01 97.6874300634092 1997-09-01 97.5791433891993 1997-10-01 97.6172747580045 1997-11-01 97.4320803870488 1997-12-01 97.4292101341282 1998-01-01 97.4683544303798 1998-02-01 97.3204317082248 1998-03-01 97.4358974358974 1998-04-01 97.3546944858420 1998-05-01 97.4721189591078 1998-06-01 97.7323420074349 1998-07-01 97.5120683252878 1998-08-01 97.3283858998145 1998-09-01 97.3645137342242 1998-10-01 97.4368499257058 1998-11-01 97.2912801484230 1998-12-01 97.2862453531599 1999-01-01 97.2882615156018 1999-02-01 97.1386101820884 1999-03-01 97.0610119047619 1999-04-01 97.2801788375559 1999-05-01 97.3234200743494 1999-06-01 97.3977695167286 1999-07-01 97.3635350909766 1999-08-01 97.3674453096033 1999-09-01 97.5899147200593 1999-10-01 97.6269929551353 1999-11-01 97.4824139207701 1999-12-01 97.4453905960755 2000-01-01 97.1523668639053 2000-02-01 97.1196454948301 2000-03-01 97.0794824399261 2000-04-01 97.1121806738245 2000-05-01 97.3382624768946 2000-06-01 97.3421926910299 2000-07-01 97.1945367294204 2000-08-01 97.3421926910299 2000-09-01 97.5690607734806 2000-10-01 97.5690607734806 2000-11-01 97.5735294117647 2000-12-01 97.5027543150936 2001-01-01 97.0620639001102 2001-02-01 96.9507714915503 2001-03-01 96.8486625137413 2001-04-01 96.9930326365970 2001-05-01 97.2191730698866 2001-06-01 97.0728137577753 2001-07-01 97.0405553525758 2001-08-01 97.1856725146199 2001-09-01 97.0383912248629 2001-10-01 97.0373079736650 2001-11-01 96.8944099378882 2001-12-01 96.6703256494694 2002-01-01 96.3656387665198 2002-02-01 96.3549337260677 2002-03-01 96.5352008846296 2002-04-01 96.5236686390532 2002-05-01 96.4180206794682 2002-06-01 96.7872968980798 2002-07-01 96.9674556213018 2002-08-01 96.9282013323464 2002-09-01 96.5593784683685 2002-10-01 96.7777777777778 2002-11-01 96.8796433878158 2002-12-01 96.6505396352810 2003-01-01 96.4205816554810 2003-02-01 96.3405526512323 2003-03-01 96.4565460649012 2003-04-01 96.4432796705354 2003-05-01 96.3364485981308 2003-06-01 96.6753828912962 2003-07-01 96.7065868263473 2003-08-01 96.6266866566717 2003-09-01 96.6254218222722 2003-10-01 96.7330078858430 2003-11-01 96.8057121382939 2003-12-01 96.6842501883949 2004-01-01 96.5673330818559 2004-02-01 96.5204236006051 2004-03-01 95.9894059780552 2004-04-01 96.2164207340144 2004-05-01 96.6275104206139 2004-06-01 96.5792474344356 2004-07-01 96.2737642585551 2004-08-01 96.3484214530240 2004-09-01 96.3089802130898 2004-10-01 96.3781929088830 2004-11-01 96.4149504195271 2004-12-01 96.1420932009167 2005-01-01 96.2127008416220 2005-02-01 96.2437715599847 2005-03-01 96.1966961198617 2005-04-01 96.0799385088394 2005-05-01 96.2039877300614 2005-06-01 96.2763915547025 2005-07-01 96.1568024596464 2005-08-01 96.0784313725490 2005-09-01 96.1582789089512 2005-10-01 96.4986533282032 2005-11-01 96.1494031574894 2005-12-01 95.9490740740741 2006-01-01 96.1761297798378 2006-02-01 96.1330239752514 2006-03-01 96.4492473948282 2006-04-01 96.3206816421379 2006-05-01 96.3622291021672 2006-06-01 96.4051024352532 2006-07-01 96.2833914053426 2006-08-01 96.0108443067390 2006-09-01 96.1702127659574 2006-10-01 96.4742347927160 2006-11-01 96.2848297213622 2006-12-01 96.2359332557237 2007-01-01 96.1403508771930 2007-02-01 96.0202887241514 2007-03-01 96.5234375000000 2007-04-01 96.5584669534611 2007-05-01 96.4062500000000 2007-06-01 96.5234375000000 2007-07-01 96.3657678780774 2007-08-01 96.2861610633307 2007-09-01 96.5234375000000 2007-10-01 96.5220789370848 2007-11-01 96.2861610633307 2007-12-01 96.3629253030896 2008-01-01 96.5166340508806 2008-02-01 96.3180571876224 2008-03-01 96.0799686397491 2008-04-01 96.2308598351001 2008-05-01 96.4341692789969 2008-06-01 96.4299725382503 2008-07-01 95.9591996861514 2008-08-01 96.3122793252256 2008-09-01 96.3151705213642 2008-10-01 96.1990595611285 2008-11-01 96.0784313725490 2008-12-01 96.1901021209741 2009-01-01 96.0738123282293 2009-02-01 95.9528487229862 2009-03-01 96.1477987421384 2009-04-01 96.1841070023604 2009-05-01 96.1871069182390 2009-06-01 96.0676366496264 2009-07-01 96.1447678992919 2009-08-01 96.1811023622047 2009-09-01 96.2234461054288 2009-10-01 96.3400236127509 2009-11-01 96.1038961038961 2009-12-01 95.9400867165944 2010-01-01 96.0946745562130 2010-02-01 96.1325966850829 2010-03-01 96.4454976303318 2010-04-01 96.4808224594701 2010-05-01 96.4060031595576 2010-06-01 96.2860529435006 2010-07-01 96.3270142180095 2010-08-01 96.3284642716147 2010-09-01 96.1341222879684 2010-10-01 96.1720599842147 2010-11-01 96.2115232833465 2010-12-01 96.0126332412160 2011-01-01 96.3665086887836 2011-02-01 96.3636363636364 2011-03-01 96.1538461538462 2011-04-01 96.1919873066244 2011-05-01 96.3506545021817 2011-06-01 96.2713209044030 2011-07-01 95.9936533121777 2011-08-01 95.9045725646123 2011-09-01 95.6004756242568 2011-10-01 95.8432304038005 2011-11-01 95.7986523979390 2011-12-01 95.7986523979390 2012-01-01 95.9539865132884 2012-02-01 95.4743946010322 2012-03-01 95.5158730158730 2012-04-01 95.7852882703777 2012-05-01 95.5431754874652 2012-06-01 96.0604854755273 2012-07-01 95.6660039761431 2012-08-01 95.6279809220986 2012-09-01 95.7836117740652 2012-10-01 95.7023477914843 2012-11-01 95.5847255369928 2012-12-01 95.2969310482264 2013-01-01 95.8516154766653 2013-02-01 95.3293413173653 2013-03-01 95.3274760383386 2013-04-01 95.7251298441870 2013-05-01 95.7667731629393 2013-06-01 96.0447463044347 2013-07-01 95.6851777866560 2013-08-01 95.6417433026789 2013-09-01 95.8849380743108 2013-10-01 95.8449860167799 2013-11-01 95.7633892885691 2013-12-01 95.7165732586069 2014-01-01 95.5528846153846 2014-02-01 95.4253611556982 2014-03-01 95.7045363307908 2014-04-01 96.0610932475884 2014-05-01 96.0674157303371 2014-06-01 95.7412615508236 2014-07-01 95.2974276527331 2014-08-01 95.4143201930812 2014-09-01 95.6626506024096 2014-10-01 95.7395498392283 2014-11-01 95.3338696701528 2014-12-01 95.3740949316170 2015-01-01 95.5716586151369 2015-02-01 95.5645161290322 2015-03-01 95.7240822912465 2015-04-01 95.6398869600323 2015-05-01 95.5187727089221 2015-06-01 95.3610326744655 2015-07-01 95.2361727896649 2015-08-01 95.1938610662359 2015-09-01 95.9224868792895 2015-10-01 95.6398869600323 2015-11-01 95.3131313131313 2015-12-01 95.9546925566343 2016-01-01 95.8737864077670 2016-02-01 95.7050243111831 2016-03-01 95.5024311183144 2016-04-01 95.4545454545454 2016-05-01 95.5745026390580 2016-06-01 95.2922077922078 2016-07-01 95.4102355808286 2016-08-01 95.8570268074736 2016-09-01 95.9366111336855 2016-10-01 95.6928078017066 2016-11-01 95.6097560975610 2016-12-01 95.8485958485958 2017-01-01 95.6026058631922 2017-02-01 95.6805215973920 2017-03-01 95.5156950672646 2017-04-01 95.3042057982850 2017-05-01 95.5528355773154 2017-06-01 95.3431372549020 2017-07-01 95.5882352941176 2017-08-01 95.6308697427521 2017-09-01 95.7125357288689 2017-10-01 95.9934587080948 2017-11-01 95.6681651001226 2017-12-01 95.4936501433839 2018-01-01 95.4508196721311 2018-02-01 95.7342083675144 2018-03-01 95.8128078817734 2018-04-01 95.6021372790793 2018-05-01 95.6414473684211 2018-06-01 95.6021372790793 2018-07-01 95.6003289473684 2018-08-01 95.6790123456790 2018-09-01 95.8419102511321