Month Growth rate same period previous year 1971-01-01 8.6142322097378100 1971-02-01 8.5501858736059300 1971-03-01 8.4870848708486900 1971-04-01 8.7912087912087800 1971-05-01 10.9090909090909000 1971-06-01 11.1510791366906000 1971-07-01 10.3571428571428000 1971-08-01 8.8652482269503600 1971-09-01 8.4507042253521200 1971-10-01 8.4210526315789400 1971-11-01 9.0909090909090800 1971-12-01 9.3749999999999900 1972-01-01 8.9655172413793200 1972-02-01 8.9041095890411000 1972-03-01 8.8435374149660000 1972-04-01 10.4377104377104000 1972-05-01 9.1803278688524500 1972-06-01 8.4142394822006600 1972-07-01 10.0323624595469000 1972-08-01 11.0749185667753000 1972-09-01 11.3636363636364000 1972-10-01 12.6213592233010000 1972-11-01 12.1794871794872000 1972-12-01 11.4285714285714000 1973-01-01 11.7088607594937000 1973-02-01 11.6352201257862000 1973-03-01 11.8750000000000000 1973-04-01 9.7560975609756200 1973-05-01 9.3093093093093200 1973-06-01 9.8507462686567100 1973-07-01 9.9999999999999900 1973-08-01 10.2639296187683000 1973-09-01 9.9125364431487100 1973-10-01 8.9080459770115000 1973-11-01 7.9999999999999900 1973-12-01 8.2621082621082500 1974-01-01 8.2152974504249500 1974-02-01 7.8873239436619800 1974-03-01 7.8212290502793400 1974-04-01 8.0555555555555600 1974-05-01 7.4175824175824200 1974-06-01 7.0652173913043500 1974-07-01 6.4171122994652300 1974-08-01 6.6489361702127700 1974-09-01 6.8965517241379100 1974-10-01 7.3878627968337800 1974-11-01 9.5238095238095200 1974-12-01 9.4736842105263200 1975-01-01 9.9476439790575700 1975-02-01 10.1827676240209000 1975-03-01 10.1036269430052000 1975-04-01 10.5398457583548000 1975-05-01 11.7647058823530000 1975-06-01 11.9289340101523000 1975-07-01 12.5628140703518000 1975-08-01 12.4688279301746000 1975-09-01 12.1588089330025000 1975-10-01 11.5479115479115000 1975-11-01 10.6280193236715000 1975-12-01 10.5769230769231000 1976-01-01 10.0000000000000000 1976-02-01 10.4265402843602000 1976-03-01 10.3529411764706000 1976-04-01 10.6976744186047000 1976-05-01 10.2974828375286000 1976-06-01 11.1111111111111000 1976-07-01 9.8214285714285900 1976-08-01 9.5343680709534300 1976-09-01 10.1769911504425000 1976-10-01 10.3524229074890000 1976-11-01 9.8253275109170400 1976-12-01 10.4347826086956000 1977-01-01 10.8225108225108000 1977-02-01 10.5150214592275000 1977-03-01 10.4477611940299000 1977-04-01 9.8739495798319300 1977-05-01 9.9585062240663900 1977-06-01 8.9795918367347000 1977-07-01 9.1463414634146300 1977-08-01 9.7165991902834100 1977-09-01 9.0361445783132600 1977-10-01 9.5808383233533000 1977-11-01 9.7415506958250600 1977-12-01 8.6614173228346500 1978-01-01 8.3984375000000100 1978-02-01 9.1262135922330200 1978-03-01 9.0733590733590800 1978-04-01 9.3690248565965600 1978-05-01 9.0566037735848900 1978-06-01 9.5505617977528000 1978-07-01 9.3109869646182600 1978-08-01 8.6715867158671400 1978-09-01 8.8397790055248700 1978-10-01 8.3788706739526300 1978-11-01 8.1521739130434800 1978-12-01 8.5144927536231800 1979-01-01 8.2882882882882800 1979-02-01 7.2953736654804100 1979-03-01 7.0796460176991000 1979-04-01 6.2937062937062800 1979-05-01 6.0553633217993100 1979-06-01 5.1282051282051300 1979-07-01 4.7700170357751100 1979-08-01 4.5840407470288700 1979-09-01 4.7377326565143700 1979-10-01 4.5378151260504200 1979-11-01 4.3551088777219300 1979-12-01 4.3405676126878200 1980-01-01 4.4925124792013400 1980-02-01 4.4776119402985100 1980-03-01 4.4628099173553800 1980-04-01 4.6052631578947400 1980-05-01 4.4045676998368700 1980-06-01 4.7154471544715500 1980-07-01 5.0406504065040500 1980-08-01 5.1948051948052000 1980-09-01 4.6849757673667200 1980-10-01 4.3408360128617400 1980-11-01 4.4943820224719000 1980-12-01 4.6400000000000000 1981-01-01 4.6178343949044600 1981-02-01 4.6031746031746100 1981-03-01 4.5886075949367000 1981-04-01 4.7169811320754600 1981-05-01 4.8437499999999900 1981-06-01 4.8136645962733000 1981-07-01 4.7987616099071400 1981-08-01 4.7839506172839500 1981-09-01 4.9382716049382800 1981-10-01 4.9306625577811900 1981-11-01 5.0691244239631600 1981-12-01 4.5871559633027600 1982-01-01 4.5662100456621000 1982-02-01 4.4006069802731300 1982-03-01 4.5385779122541600 1982-04-01 4.2042042042042200 1982-05-01 3.8748137108793000 1982-06-01 3.8518518518518400 1982-07-01 3.8404726735598100 1982-08-01 3.8291605301914400 1982-09-01 3.6764705882352800 1982-10-01 3.5242290748898700 1982-11-01 3.3625730994152100 1982-12-01 3.6549707602339200 1983-01-01 3.2023289665211100 1983-02-01 3.4883720930232800 1983-03-01 3.0390738060781700 1983-04-01 3.3141210374639800 1983-05-01 3.5868005738880900 1983-06-01 3.4236804564907300 1983-07-01 3.4139402560455400 1983-08-01 3.1205673758865400 1983-09-01 3.2624113475177300 1983-10-01 3.4042553191489600 1983-11-01 3.3946251768033800 1983-12-01 2.9619181946403200 1984-01-01 2.6798307475317200 1984-02-01 2.5280898876404400 1984-03-01 2.6685393258426800 1984-04-01 2.2315202231520100 1984-05-01 1.6620498614958500 1984-06-01 1.6551724137931000 1984-07-01 1.3755158184319000 1984-08-01 1.7881705639614700 1984-09-01 1.6483516483516500 1984-10-01 1.5089163237311200 1984-11-01 1.6415868673050600 1984-12-01 1.9178082191781000 1985-01-01 2.3351648351648400 1985-02-01 2.1917808219178100 1985-03-01 2.3255813953488400 1985-04-01 2.3192360163710800 1985-05-01 2.7247956403269800 1985-06-01 2.4423337856173700 1985-07-01 2.5780189959294500 1985-08-01 2.2972972972973000 1985-09-01 2.4324324324324300 1985-10-01 2.5675675675675800 1985-11-01 2.5572005383580100 1985-12-01 2.6881720430107500 1986-01-01 2.5503355704698200 1986-02-01 2.6809651474530900 1986-03-01 2.6737967914438500 1986-04-01 2.6666666666666700 1986-05-01 2.5198938992042300 1986-06-01 2.6490066225165600 1986-07-01 2.7777777777777800 1986-08-01 2.6420079260237800 1986-09-01 2.9023746701847000 1986-10-01 2.8985507246376500 1986-11-01 2.7559055118110300 1986-12-01 2.4869109947643800 1987-01-01 2.7486910994764300 1987-02-01 2.6109660574412400 1987-03-01 2.4739583333333400 1987-04-01 2.5974025974026000 1987-05-01 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