Month Growth rate same period previous year 1981-01-01 12.2077922077922000 1981-02-01 12.2077922077922000 1981-03-01 12.2077922077922000 1981-04-01 11.8523613021550000 1981-05-01 11.8523613021550000 1981-06-01 11.8523613021550000 1981-07-01 13.0249270154952000 1981-08-01 13.0249270154952000 1981-09-01 13.0249270154952000 1981-10-01 12.8855830234084000 1981-11-01 12.8855830234084000 1981-12-01 12.8855830234084000 1982-01-01 12.4158249158249000 1982-02-01 12.4158249158249000 1982-03-01 12.4158249158249000 1982-04-01 12.0926419348227000 1982-05-01 12.0926419348227000 1982-06-01 12.0926419348227000 1982-07-01 9.3781045102324700 1982-08-01 9.3781045102324700 1982-09-01 9.3781045102324700 1982-10-01 8.7984496124031100 1982-11-01 8.7984496124031100 1982-12-01 8.7984496124031100 1983-01-01 8.6484462748034600 1983-02-01 8.6484462748034600 1983-03-01 8.6484462748034600 1983-04-01 8.1184860120680300 1983-05-01 8.1184860120680300 1983-06-01 8.1184860120680300 1983-07-01 9.3914623069936300 1983-08-01 9.3914623069936300 1983-09-01 9.3914623069936300 1983-10-01 7.5881724260776600 1983-11-01 7.5881724260776600 1983-12-01 7.5881724260776600 1984-01-01 7.1847002067539500 1984-02-01 7.1847002067539500 1984-03-01 7.1847002067539500 1984-04-01 5.9868087265347600 1984-05-01 5.9868087265347600 1984-06-01 5.9868087265347600 1984-07-01 6.0278977084025400 1984-08-01 6.0278977084025400 1984-09-01 6.0278977084025400 1984-10-01 5.8609271523178700 1984-11-01 5.8609271523178700 1984-12-01 5.8609271523178700 1985-01-01 5.5457321973959200 1985-02-01 5.5457321973959200 1985-03-01 5.5457321973959200 1985-04-01 5.3454603478538200 1985-05-01 5.3454603478538200 1985-06-01 5.3454603478538200 1985-07-01 4.5418950665622600 1985-08-01 4.5418950665622600 1985-09-01 4.5418950665622600 1985-10-01 4.9577729121051100 1985-11-01 4.9577729121051100 1985-12-01 4.9577729121051100 1986-01-01 4.8279013097776500 1986-02-01 4.8279013097776500 1986-03-01 4.8279013097776500 1986-04-01 4.8167222053923200 1986-05-01 4.8167222053923200 1986-06-01 4.8167222053923200 1986-07-01 4.6142322097378300 1986-08-01 4.6142322097378300 1986-09-01 4.6142322097378300 1986-10-01 4.3212635970794200 1986-11-01 4.3212635970794200 1986-12-01 4.3212635970794200 1987-01-01 3.5594944065087900 1987-02-01 3.5594944065087900 1987-03-01 3.5594944065087900 1987-04-01 3.0057803468208100 1987-05-01 3.0057803468208100 1987-06-01 3.0057803468208100 1987-07-01 2.8640985249892600 1987-08-01 2.8640985249892600 1987-09-01 2.8640985249892600 1987-10-01 3.1138408798743000 1987-11-01 3.1138408798743000 1987-12-01 3.1138408798743000 1988-01-01 3.3108866442199900 1988-02-01 3.3108866442199900 1988-03-01 3.3108866442199900 1988-04-01 3.6896745230078500 1988-05-01 3.6896745230078500 1988-06-01 3.6896745230078500 1988-07-01 3.4108311290547100 1988-08-01 3.4108311290547100 1988-09-01 3.4108311290547100 1988-10-01 3.2691508519185400 1988-11-01 3.2691508519185400 1988-12-01 3.2691508519185400 1989-01-01 3.6936447582835300 1989-02-01 3.6936447582835300 1989-03-01 3.6936447582835300 1989-04-01 3.9372209443918200 1989-05-01 3.9372209443918200 1989-06-01 3.9372209443918200 1989-07-01 3.6618201400107700 1989-08-01 3.6618201400107700 1989-09-01 3.6618201400107700 1989-10-01 3.5278336686787500 1989-11-01 3.5278336686787500 1989-12-01 3.5278336686787500 1990-01-01 3.3263488737559000 1990-02-01 3.3263488737559000 1990-03-01 3.3263488737559000 1990-04-01 3.0590991929185300 1990-05-01 3.0590991929185300 1990-06-01 3.0590991929185300 1990-07-01 3.5324675324675400 1990-08-01 3.5324675324675400 1990-09-01 3.5324675324675400 1990-10-01 3.9906711583311900 1990-11-01 3.9906711583311900 1990-12-01 3.9906711583311900 1991-01-01 4.2585551330798600 1991-02-01 4.2585551330798600 1991-03-01 4.2585551330798600 1991-04-01 4.1303524062144600 1991-05-01 4.1303524062144600 1991-06-01 4.2440318302387200 1991-07-01 4.0893125940792700 1991-08-01 4.0893125940792700 1991-09-01 4.0893125940792700 1991-10-01 4.0742586593570800 1991-11-01 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