Month Growth rate same period previous year 1971-01-01 12.50000000000000 1971-02-01 12.50000000000000 1971-03-01 12.50000000000000 1971-04-01 5.88235294117645 1971-05-01 5.88235294117645 1971-06-01 11.76470588235290 1971-07-01 11.76470588235290 1971-08-01 11.76470588235290 1971-09-01 11.76470588235290 1971-10-01 11.76470588235290 1971-11-01 17.64705882352940 1971-12-01 17.64705882352940 1972-01-01 11.11111111111110 1972-02-01 11.11111111111110 1972-03-01 11.11111111111110 1972-04-01 16.66666666666670 1972-05-01 16.66666666666670 1972-06-01 10.52631578947370 1972-07-01 10.52631578947370 1972-08-01 10.52631578947370 1972-09-01 15.78947368421050 1972-10-01 15.78947368421050 1972-11-01 10.00000000000000 1972-12-01 10.00000000000000 1973-01-01 15.00000000000000 1973-02-01 15.00000000000000 1973-03-01 20.00000000000000 1973-04-01 19.04761904761900 1973-05-01 23.80952380952380 1973-06-01 23.80952380952380 1973-07-01 28.57142857142860 1973-08-01 23.80952380952380 1973-09-01 22.72727272727270 1973-10-01 22.72727272727270 1973-11-01 27.27272727272730 1973-12-01 27.27272727272730 1974-01-01 26.08695652173910 1974-02-01 26.08695652173910 1974-03-01 25.00000000000000 1974-04-01 24.00000000000000 1974-05-01 23.07692307692310 1974-06-01 23.07692307692310 1974-07-01 18.51851851851850 1974-08-01 23.07692307692310 1974-09-01 22.22222222222220 1974-10-01 25.92592592592590 1974-11-01 25.00000000000000 1974-12-01 25.00000000000000 1975-01-01 24.13793103448280 1975-02-01 27.58620689655170 1975-03-01 26.66666666666670 1975-04-01 25.80645161290320 1975-05-01 25.00000000000000 1975-06-01 25.00000000000000 1975-07-01 25.00000000000000 1975-08-01 25.00000000000000 1975-09-01 24.24242424242420 1975-10-01 20.58823529411760 1975-11-01 17.14285714285710 1975-12-01 17.14285714285710 1976-01-01 16.66666666666670 1976-02-01 16.21621621621620 1976-03-01 15.78947368421050 1976-04-01 15.38461538461540 1976-05-01 15.00000000000000 1976-06-01 17.50000000000000 1976-07-01 20.00000000000000 1976-08-01 22.50000000000000 1976-09-01 21.95121951219510 1976-10-01 21.95121951219510 1976-11-01 26.82926829268290 1976-12-01 26.82926829268290 1977-01-01 26.19047619047620 1977-02-01 27.90697674418610 1977-03-01 31.81818181818180 1977-04-01 37.77777777777780 1977-05-01 39.13043478260870 1977-06-01 40.42553191489360 1977-07-01 39.58333333333340 1977-08-01 36.73469387755100 1977-09-01 34.00000000000000 1977-10-01 34.00000000000000 1977-11-01 28.84615384615380 1977-12-01 28.84615384615380 1978-01-01 28.30188679245280 1978-02-01 25.45454545454540 1978-03-01 22.41379310344830 1978-04-01 16.12903225806450 1978-05-01 15.62500000000000 1978-06-01 15.15151515151510 1978-07-01 13.43283582089550 1978-08-01 13.43283582089550 1978-09-01 13.43283582089550 1978-10-01 16.41791044776120 1978-11-01 17.91044776119400 1978-12-01 19.40298507462690 1979-01-01 20.58823529411760 1979-02-01 21.73913043478260 1979-03-01 22.53521126760560 1979-04-01 23.61111111111110 1979-05-01 22.97297297297300 1979-06-01 21.05263157894740 1979-07-01 22.36842105263160 1979-08-01 25.00000000000000 1979-09-01 27.63157894736840 1979-10-01 25.64102564102560 1979-11-01 27.84810126582280 1979-12-01 27.50000000000000 1980-01-01 28.04878048780490 1980-02-01 26.19047619047620 1980-03-01 24.13793103448280 1980-04-01 25.84269662921350 1980-05-01 27.47252747252750 1980-06-01 28.26086956521740 1980-07-01 27.95698924731180 1980-08-01 26.31578947368420 1980-09-01 25.77319587628870 1980-10-01 26.53061224489800 1980-11-01 25.74257425742580 1980-12-01 26.47058823529410 1981-01-01 25.71428571428570 1981-02-01 28.30188679245280 1981-03-01 28.70370370370370 1981-04-01 27.67857142857140 1981-05-01 25.86206896551730 1981-06-01 27.11864406779660 1981-07-01 28.57142857142860 1981-08-01 29.16666666666670 1981-09-01 27.86885245901640 1981-10-01 27.41935483870970 1981-11-01 26.77165354330710 1981-12-01 26.35658914728680 1982-01-01 25.75757575757580 1982-02-01 25.00000000000000 1982-03-01 25.17985611510790 1982-04-01 24.47552447552450 1982-05-01 25.34246575342470 1982-06-01 24.66666666666670 1982-07-01 23.52941176470590 1982-08-01 23.87096774193540 1982-09-01 25.00000000000000 1982-10-01 25.31645569620250 1982-11-01 24.84472049689440 1982-12-01 23.92638036809810 1983-01-01 22.89156626506020 1983-02-01 21.76470588235290 1983-03-01 21.26436781609200 1983-04-01 22.47191011235960 1983-05-01 21.85792349726780 1983-06-01 20.32085561497330 1983-07-01 20.10582010582010 1983-08-01 18.22916666666670 1983-09-01 16.92307692307690 1983-10-01 17.17171717171720 1983-11-01 16.91542288557210 1983-12-01 16.83168316831690 1984-01-01 17.15686274509800 1984-02-01 16.90821256038650 1984-03-01 17.06161137440760 1984-04-01 15.59633027522930 1984-05-01 14.34977578475340 1984-06-01 15.11111111111110 1984-07-01 15.41850220264320 1984-08-01 15.85903083700440 1984-09-01 16.66666666666670 1984-10-01 15.51724137931040 1984-11-01 16.17021276595740 1984-12-01 18.22033898305080 1985-01-01 19.24686192468620 1985-02-01 21.48760330578510 1985-03-01 22.67206477732790 1985-04-01 23.41269841269840 1985-05-01 27.84313725490200 1985-06-01 28.18532818532820 1985-07-01 25.95419847328240 1985-08-01 24.71482889733840 1985-09-01 24.43609022556390 1985-10-01 24.62686567164180 1985-11-01 23.44322344322340 1985-12-01 22.58064516129030 1986-01-01 23.50877192982460 1986-02-01 23.46938775510200 1986-03-01 22.77227722772280 1986-04-01 22.82958199356910 1986-05-01 16.25766871165640 1986-06-01 13.25301204819280 1986-07-01 13.93939393939390 1986-08-01 16.15853658536590 1986-09-01 16.91842900302110 1986-10-01 18.26347305389220 1986-11-01 19.58456973293770 1986-12-01 20.76023391812860 1987-01-01 21.30681818181820 1987-02-01 19.83471074380160 1987-03-01 20.16129032258060 1987-04-01 19.63350785340320 1987-05-01 22.69129287598950 1987-06-01 24.73404255319150 1987-07-01 26.59574468085110 1987-08-01 25.45931758530180 1987-09-01 25.06459948320410 1987-10-01 24.81012658227850 1987-11-01 24.81389578163770 1987-12-01 23.97094430992740 1988-01-01 23.65339578454340 1988-02-01 26.20689655172420 1988-03-01 26.39821029082780 1988-04-01 28.44638949671770 1988-05-01 28.38709677419350 1988-06-01 30.49040511727080 1988-07-01 30.25210084033620 1988-08-01 29.49790794979080 1988-09-01 28.92561983471080 1988-10-01 28.39756592292090 1988-11-01 27.63419483101390 1988-12-01 28.32031250000000 1989-01-01 27.84090909090910 1989-02-01 27.14025500910750 1989-03-01 26.54867256637170 1989-04-01 24.87223168654170 1989-05-01 24.95812395309880 1989-06-01 23.52941176470590 1989-07-01 23.87096774193540 1989-08-01 25.68659127625200 1989-09-01 26.44230769230770 1989-10-01 26.69826224328590 1989-11-01 27.10280373831770 1989-12-01 26.02739726027400 1990-01-01 26.66666666666670 1990-02-01 27.07736389684810 1990-03-01 27.69230769230770 1990-04-01 27.96725784447480 1990-05-01 28.28418230563000 1990-06-01 28.96825396825400 1990-07-01 28.64583333333340 1990-08-01 29.04884318766060 1990-09-01 30.29150823827630 1990-10-01 30.67331670822940 1990-11-01 31.00490196078430 1990-12-01 32.36714975845410 1991-01-01 32.04678362573100 1991-02-01 31.67981961668550 1991-03-01 31.10624315443590 1991-04-01 31.23667377398720 1991-05-01 31.45245559038660 1991-06-01 31.07692307692310 1991-07-01 31.68016194331980 1991-08-01 31.17529880478090 1991-09-01 30.05836575875480 1991-10-01 29.19847328244280 1991-11-01 28.25070159027130 1991-12-01 26.82481751824820 1992-01-01 27.45792736935340 1992-02-01 27.31164383561640 1992-03-01 27.06766917293230 1992-04-01 27.13241267262390 1992-05-01 27.26550079491260 1992-06-01 28.09076682316120 1992-07-01 28.36279784780940 1992-08-01 27.71450265755510 1992-09-01 26.85115931189230 1992-10-01 26.36632200886260 1992-11-01 25.67469000729390 1992-12-01 25.17985611510790 1993-01-01 24.80889506601810 1993-02-01 24.68056489576330 1993-03-01 24.19460880999340 1993-04-01 23.06709265175720 1993-05-01 22.23610243597750 1993-06-01 21.38057422113620 1993-07-01 20.47904191616770 1993-08-01 21.10582639714620 1993-09-01 21.46226415094340 1993-10-01 21.68322618351840 1993-11-01 22.40278583865350 1993-12-01 22.58620689655170 1994-01-01 22.49443207126950 1994-02-01 23.03128371089540 1994-03-01 23.45156167284280 1994-04-01 23.93561786085150 1994-05-01 23.86305569749610 1994-06-01 23.10015098137900 1994-07-01 22.66401590457260 1994-08-01 22.33676975945020 1994-09-01 22.33009708737860 1994-10-01 22.38232468780020 1994-11-01 22.14319582740630 1994-12-01 22.59728082512890 1995-01-01 21.04545454545460 1995-02-01 20.86804033318720 1995-03-01 21.31217838765010 1995-04-01 21.15626309174700 1995-05-01 21.28712871287130 1995-06-01 21.66802943581360 1995-07-01 21.51539708265800 1995-08-01 21.10754414125200 1995-09-01 20.79365079365080 1995-10-01 20.52590266875980 1995-11-01 20.14751552795030 1995-12-01 19.46462715105160 1996-01-01 20.24033045437480 1996-02-01 20.81973159231050 1996-03-01 20.21915871332630 1996-04-01 19.91701244813280 1996-05-01 19.79591836734700 1996-06-01 19.69086021505370 1996-07-01 20.57352450816940 1996-08-01 21.13982770046390 1996-09-01 21.55059132720100 1996-10-01 21.84956040377730 1996-11-01 21.87399030694670 1996-12-01 21.63892445582590 1997-01-01 20.64334790755780 1997-02-01 19.57370159111380 1997-03-01 18.93560717436050 1997-04-01 18.54094579008070 1997-05-01 18.59738784781370 1997-06-01 18.69736103312750 1997-07-01 17.89269911504430 1997-08-01 17.94310722100650 1997-09-01 18.00000000000000 1997-10-01 17.79796900053440 1997-11-01 17.81548250265110 1997-12-01 17.68421052631580 1998-01-01 17.83587885063420 1998-02-01 18.02661310569920 1998-03-01 19.25834363411620 1998-04-01 20.74920943809290 1998-05-01 20.68470193919080 1998-06-01 20.69536423841060 1998-07-01 20.26741731175230 1998-08-01 18.94712430426720 1998-09-01 17.81951442968390 1998-10-01 17.10526315789480 1998-11-01 16.35913591359140 1998-12-01 16.68157423971380 1999-01-01 17.17926186291740 1999-02-01 15.37970644543720 1999-03-01 13.49502487562190 1999-04-01 11.16035455278000 1999-05-01 9.99801626661376 1999-06-01 8.95551636292379 1999-07-01 8.77706260971330 1999-08-01 9.28056151296549 1999-09-01 9.33125972006220 1999-10-01 9.31809376210772 1999-11-01 9.64997099207117 1999-12-01 9.23725565350709 2000-01-01 8.24896887889012 2000-02-01 8.90486725663717 2000-03-01 9.73515981735160 2000-04-01 9.96737948532078 2000-05-01 9.99098286744816 2000-06-01 9.67625899280574 2000-07-01 9.30607853684775 2000-08-01 9.09901873327387 2000-09-01 9.19274537695590 2000-10-01 8.98458266879319 2000-11-01 8.83597883597882 2000-12-01 8.75438596491227 2001-01-01 8.48631797713892 2001-02-01 8.05823599119689 2001-03-01 7.80625832223700 2001-04-01 7.95978905735004 2001-05-01 7.87014264633547 2001-06-01 7.93702853394554 2001-07-01 8.08727034120734 2001-08-01 8.02943581357319 2001-09-01 7.96287249633611 2001-10-01 8.01626016260166 2001-11-01 7.76211310970672 2001-12-01 7.64639457977093 2002-01-01 7.37547892720307 2002-02-01 6.70531098229674 2002-03-01 5.89779218774126 2002-04-01 5.66325751793620 2002-05-01 5.83675330597352 2002-06-01 6.24430264357340 2002-07-01 6.14660798300198 2002-08-01 5.97941265516197 2002-09-01 5.97285067873304 2002-10-01 6.36760499774195 2002-11-01 7.06766917293233 2002-12-01 6.99835156601230 2003-01-01 7.38923580136781 2003-02-01 7.23829099985318 2003-03-01 7.59585945473100 2003-04-01 7.84455359722623 2003-05-01 7.72655464598596 2003-06-01 7.20720720720720 2003-07-01 7.03460108664570 2003-08-01 7.27038994429365 2003-09-01 7.11642470822659 2003-10-01 6.58080951033116 2003-11-01 6.13764044943818 2003-12-01 6.48459383753500 2004-01-01 6.18856430845909 2004-02-01 6.27053669222344 2004-03-01 6.21951219512196 2004-04-01 5.47890154052242 2004-05-01 5.37261698440208 2004-06-01 6.06909430438844 2004-07-01 6.19823670852257 2004-08-01 5.88548601864182 2004-09-01 5.97927185756047 2004-10-01 5.89563139025362 2004-11-01 5.82241630276565 2004-12-01 5.49782980402471 2005-01-01 5.43676662320730 2005-02-01 5.25637722236535 2005-03-01 5.02615129480801 2005-04-01 5.01651003302007 2005-05-01 5.04807692307692 2005-06-01 4.82897384305834 2005-07-01 4.90566037735851 2005-08-01 4.87927565392355 2005-09-01 5.01504513540622 2005-10-01 5.26645768025080 2005-11-01 5.10191321745655 2005-12-01 4.84976935544198 2006-01-01 4.56287869420057 2006-02-01 4.17380660954712 2006-03-01 4.10542936961009 2006-04-01 4.12383601402829 2006-05-01 4.03468625797903 2006-06-01 3.93474088291748 2006-07-01 4.31654676258991 2006-08-01 4.72422062350120 2006-09-01 4.57258834765997 2006-10-01 4.18106015485406 2006-11-01 4.30696014277217 2006-12-01 4.48275862068965 2007-01-01 4.70671712393566 2007-02-01 5.25202678886147 2007-03-01 5.78695601446741 2007-04-01 6.24854819976772 2007-05-01 6.22829358647836 2007-06-01 6.03647276084949 2007-07-01 5.77011494252874 2007-08-01 5.22097549805358 2007-09-01 5.00057084142023 2007-10-01 5.16807683512464 2007-11-01 5.41804494125699 2007-12-01 5.69022419483329 2008-01-01 5.99728936074091 2008-02-01 6.35186425541415 2008-03-01 5.92257637586852 2008-04-01 5.72802798425886 2008-05-01 6.38622493461202 2008-06-01 7.18406443888102 2008-07-01 7.52010432514669 2008-08-01 7.86724700761696 2008-09-01 7.57855822550832 2008-10-01 7.93650793650793 2008-11-01 7.72560051936810 2008-12-01 7.67739851405189 2009-01-01 7.18167288225892 2009-02-01 6.46583394562822 2009-03-01 6.14327363598501 2009-04-01 5.72787427626138 2009-05-01 4.77361196476131 2009-06-01 3.80826647709962 2009-07-01 3.27471194663434 2009-08-01 3.12720669827500 2009-09-01 3.21406913280778 2009-10-01 2.71958098307817 2009-11-01 2.37042989152271 2009-12-01 1.99999999999999 2010-01-01 2.09762401829209 2010-02-01 2.09011140688160 2010-03-01 1.83441239945065 2010-04-01 1.98513592802660 2010-05-01 2.07274149393823 2010-06-01 2.25004891410682 2010-07-01 2.24114308083774 2010-08-01 2.30852000391274 2010-09-01 2.28162945554249 2010-10-01 2.33379093939989 2010-11-01 2.59026687598115 2010-12-01 3.17647058823529 2011-01-01 3.39824732229795 2011-02-01 3.16755190729116 2011-03-01 3.18851748386476 2011-04-01 2.83823952440309 2011-05-01 3.01724137931033 2011-06-01 3.23383084577117 2011-07-01 3.42682109696563 2011-08-01 3.26991108136534 2011-09-01 3.73384394447104 2011-10-01 4.01494825603678 2011-11-01 3.95944912012241 2011-12-01 3.72481946028125 2012-01-01 3.55024013560598 2012-02-01 3.55705326219228 2012-03-01 3.39805825242718 2012-04-01 3.42191142191142 2012-05-01 3.44026034402605 2012-06-01 3.19740500463389 2012-07-01 3.02637667746413 2012-08-01 3.11082307193778 2012-09-01 3.08260267651131 2012-10-01 3.05849838783971 2012-11-01 2.77828886844526 2012-12-01 2.43679003297911 2013-01-01 1.99163332120774 2013-02-01 1.82590617373226 2013-03-01 1.91404839292162 2013-04-01 2.01947349441039 2013-05-01 2.00449438202247 2013-06-01 2.15536596317917 2013-07-01 2.22781171397772 2013-08-01 2.26272784412319 2013-09-01 2.27415166980035 2013-10-01 1.84142308036116 2013-11-01 1.75438596491229 2013-12-01 1.93167590770885 2014-01-01 2.13107445385645 2014-02-01 2.31691078561917 2014-03-01 2.50708717221829 2014-04-01 2.72180982679392 2014-05-01 2.93443778639409 2014-06-01 2.77802197802198 2014-07-01 2.89103690685415 2014-08-01 3.02045833699184 2014-09-01 2.85389127199509 2014-10-01 3.29149477749493 2014-11-01 3.65939479239973 2014-12-01 3.65853658536584 2015-01-01 3.81526104417669 2015-02-01 4.35537046677078 2015-03-01 4.55448967245699 2015-04-01 4.63695801789401 2015-05-01 4.40030819279170 2015-06-01 4.42220511504577 2015-07-01 4.45810914681015 2015-08-01 4.74729395721470 2015-09-01 5.35364711890373 2015-10-01 5.89734874235214 2015-11-01 6.39002036659877 2015-12-01 6.77105374523911 2016-01-01 7.45942309309562 2016-02-01 7.59062188227469 2016-03-01 7.97652504546207 2016-04-01 7.93389788703446 2016-05-01 8.20008200081998 2016-06-01 8.60091743119265 2016-07-01 8.96083721690786 2016-08-01 8.09601301871440 2016-09-01 7.27096461463889 2016-10-01 6.48371047985877 2016-11-01 5.96633963468135 2016-12-01 5.74712643678161 2017-01-01 5.47033964626702 2017-02-01 5.18507070550962 2017-03-01 4.69264334379544 2017-04-01 4.66179159049362 2017-05-01 4.36528988253130 2017-06-01 3.99004374717152 2017-07-01 3.39911457942523 2017-08-01 3.86902521640948 2017-09-01 3.96897123060701 2017-10-01 4.04672192916352 2017-11-01 4.11742566804666 2017-12-01 4.08545727136431 2018-01-01 3.67292424129999 2018-02-01 3.37202468410226 2018-03-01 3.13688212927757 2018-04-01 3.12954876273650 2018-05-01 3.15881199622393 2018-06-01 3.19866540944369 2018-07-01 3.12046444121916 2018-08-01 3.10167403435031 2018-09-01 3.22346975733430 2018-10-01 2.84638226986310