Month Growth rate same period previous year 1971-01-01 8.5034013605442300 1971-02-01 8.4459459459459300 1971-03-01 8.3892617449664300 1971-04-01 8.6666666666666800 1971-05-01 8.9108910891089200 1971-06-01 8.8524590163934500 1971-07-01 8.7947882736156400 1971-08-01 7.7419354838709800 1971-09-01 7.7170418006430900 1971-10-01 7.6433121019108200 1971-11-01 7.9365079365079400 1971-12-01 7.8864353312302900 1972-01-01 7.5235109717868200 1972-02-01 7.4766355140187000 1972-03-01 7.1207430340557500 1972-04-01 7.6687116564417200 1972-05-01 7.5757575757575600 1972-06-01 8.1325301204819200 1972-07-01 7.7844311377245400 1972-08-01 8.3832335329341400 1972-09-01 8.9552238805970100 1972-10-01 8.8757396449704200 1972-11-01 8.8235294117647000 1972-12-01 8.4795321637426800 1973-01-01 8.7463556851312000 1973-02-01 8.6956521739130400 1973-03-01 9.2485549132947900 1973-04-01 8.5470085470085400 1973-05-01 8.4507042253521200 1973-06-01 8.0779944289693500 1973-07-01 8.8888888888889000 1973-08-01 8.8397790055248500 1973-09-01 8.7671232876712400 1973-10-01 8.1521739130434700 1973-11-01 8.1081081081081200 1973-12-01 8.0862533692722400 1974-01-01 8.0428954423592400 1974-02-01 8.0000000000000100 1974-03-01 7.9365079365079300 1974-04-01 7.6115485564304500 1974-05-01 7.2727272727272600 1974-06-01 7.4742268041237300 1974-07-01 6.8877551020408100 1974-08-01 7.1065989847715800 1974-09-01 6.8010075566750500 1974-10-01 7.5376884422110600 1974-11-01 7.7500000000000100 1974-12-01 7.9800498753117100 1975-01-01 8.4367245657568400 1975-02-01 8.6419753086419700 1975-03-01 8.5784313725490300 1975-04-01 9.5121951219512100 1975-05-01 9.9273607748184100 1975-06-01 10.0719424460432000 1975-07-01 10.2625298329356000 1975-08-01 10.1895734597156000 1975-09-01 9.9056603773585000 1975-10-01 9.5794392523364400 1975-11-01 9.7447795823665700 1975-12-01 9.9307159353348800 1976-01-01 9.3821510297482600 1976-02-01 9.7727272727272700 1976-03-01 9.7065462753950400 1976-04-01 9.7995545657015600 1976-05-01 10.1321585903084000 1976-06-01 10.0217864923747000 1976-07-01 10.1731601731602000 1976-08-01 10.1075268817204000 1976-09-01 10.5150214592275000 1976-10-01 10.2345415778252000 1976-11-01 10.1479915433404000 1976-12-01 10.9243697478992000 1977-01-01 11.2970711297071000 1977-02-01 10.9730848861284000 1977-03-01 10.6995884773663000 1977-04-01 10.5476673427992000 1977-05-01 10.4000000000000000 1977-06-01 10.2970297029703000 1977-07-01 10.2161100196464000 1977-08-01 10.1562500000000000 1977-09-01 9.9029126213592300 1977-10-01 10.2514506769826000 1977-11-01 9.9808061420345400 1977-12-01 8.9015151515151600 1978-01-01 8.6466165413533700 1978-02-01 8.3955223880597100 1978-03-01 8.7360594795538900 1978-04-01 8.6238532110091800 1978-05-01 8.1521739130434800 1978-06-01 8.2585278276481000 1978-07-01 7.8431372549019500 1978-08-01 7.6241134751773300 1978-09-01 8.1272084805653600 1978-10-01 8.0701754385964800 1978-11-01 8.0279232111692900 1978-12-01 7.6521739130434700 1979-01-01 7.7854671280276900 1979-02-01 7.4010327022375100 1979-03-01 6.6666666666666700 1979-04-01 6.0810810810810700 1979-05-01 5.6951423785594500 1979-06-01 4.9751243781094600 1979-07-01 4.9586776859504200 1979-08-01 4.7775947281713200 1979-09-01 4.4117647058823600 1979-10-01 3.8961038961039000 1979-11-01 3.8772213247172900 1979-12-01 3.8772213247172900 1980-01-01 3.5313001605136500 1980-02-01 3.6858974358974400 1980-03-01 3.8461538461538500 1980-04-01 3.8216560509554200 1980-05-01 4.1204437400950900 1980-06-01 4.1074249605055300 1980-07-01 4.8818897637795100 1980-08-01 4.8742138364779900 1980-09-01 4.6948356807511800 1980-10-01 4.8437499999999900 1980-11-01 4.6656298600310900 1980-12-01 4.9766718506998500 1981-01-01 5.1162790697674300 1981-02-01 4.9459041731066500 1981-03-01 5.0925925925925800 1981-04-01 5.2147239263803600 1981-05-01 5.1750380517503700 1981-06-01 5.3110773899848300 1981-07-01 4.5045045045045100 1981-08-01 4.4977511244377800 1981-09-01 4.3348281016442300 1981-10-01 4.3219076005961500 1981-11-01 4.3090638930163700 1981-12-01 4.2962962962963000 1982-01-01 4.1297935103244900 1982-02-01 4.2709867452135400 1982-03-01 4.1116005873715300 1982-04-01 4.5189504373178000 1982-05-01 4.3415340086830700 1982-06-01 4.1786743515850000 1982-07-01 4.1666666666666700 1982-08-01 4.0172166427546500 1982-09-01 4.0114613180515800 1982-10-01 3.8571428571428600 1982-11-01 3.8461538461538500 1982-12-01 3.8352272727272600 1983-01-01 3.8243626062323000 1983-02-01 3.8135593220339000 1983-03-01 3.9492242595204400 1983-04-01 3.4867503486750200 1983-05-01 3.6061026352288500 1983-06-01 3.7344398340249000 1983-07-01 3.7241379310344900 1983-08-01 4.0000000000000200 1983-09-01 3.8567493112947800 1983-10-01 4.4016506189821200 1983-11-01 4.3895747599451200 1983-12-01 4.2407660738714100 1984-01-01 3.9563437926330200 1984-02-01 3.8095238095238100 1984-03-01 3.7991858887381300 1984-04-01 3.5040431266846400 1984-05-01 3.2128514056224800 1984-06-01 3.0666666666666700 1984-07-01 3.3244680851063900 1984-08-01 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