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6401.0.55.003 - Seasonal Adjustment of Consumer Price Indexes, 2011  
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 14/09/2011  First Issue
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CHANGES TO THE CPI PUBLICATION


5.1 The September quarter 2011 issue of Consumer Price Index, Australia (cat. no. 6401.0), scheduled for release on 26 October 2011, will contain the following changes to the analytical measures.

Seasonally Adjusted Price Indexes

    • All groups CPI, seasonally adjusted. The index numbers, percentage change from corresponding quarter of previous year and percentage change from previous quarter series will all be published to one decimal place. Percentage changes will be calculated in the conventional way, that is from the index numbers that have been rounded to one decimal place. Index numbers for the All groups CPI, seasonally adjusted time series will begin with the December quarter 1986, with an index reference period of 1989-90 = 100.0.
    • CPI expenditure classes, seasonally adjusted. The index numbers will be published to one decimal place. The CPI expenditure classes, seasonally adjusted time series will begin with the September quarter 1972 for the subset of expenditure classes that are identified as seasonal, with an index reference period of 1989-90 = 100.0.
    Trimmed mean and Weighted median
      • The index numbers, percentage change from corresponding quarter of previous year and percentage change from previous quarter series, calculated using the 16th series (standard ABS) seasonal adjustment methodology, will all be published to one decimal place. Percentage changes will be calculated in the conventional way. The Trimmed mean and Weighted median time series will begin with the June quarter 2002, with an index reference period of June quarter 2002 = 100.0.
    FURTHER INFORMATION
    5.2 For more information regarding the changes to the CPI from the September quarter 2011, please contact the Consumer Price Index Section, on Canberra (02) 6252 6654.


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