6401.0.55.003 - Seasonal Adjustment of Consumer Price Indexes, 2011  
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 14/09/2011  First Issue
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APPENDIX 2 : MEASURES OF UNDERLYING TREND INFLATION

    Table 2: Measures of underlying trend inflation, Index numbers (a)
    16th series seasonal adjustment methodology
    Period
    All groups CPI
    (b)
    All groups CPI, seasonally adjusted
    (b)
    Trimmed mean
    (c)
    Weighted median
    (c)
    INDEX NUMBERS
    2007
    June
    157.5
    157.4
    114.7
    115.2
    September
    158.6
    158.3
    115.7
    116.3
    December
    160.1
    160.3
    117.1
    117.8
    2008
    March
    162.2
    162.4
    118.6
    119.3
    June
    164.6
    164.5
    119.9
    120.5
    September
    166.5
    166.1
    121.3
    122.0
    December
    166.0
    166.2
    122.1
    123.1
    2009
    March
    166.2
    166.2
    123.3
    124.5
    June
    167.0
    166.9
    124.1
    125.5
    September
    168.6
    168.2
    125.1
    126.7
    December
    169.5
    169.7
    126.1
    127.8
    2010
    March
    171.0
    171.1
    127.1
    128.9
    June
    172.1
    172.0
    127.6
    129.3
    September
    173.3
    172.9
    128.3
    130.0
    December
    174.0
    174.3
    128.8
    130.9
    2011
    March
    176.7
    176.7
    129.9
    132.0
    June
    178.3
    178.3
    130.8
    132.7
    Note: (a) Weighted average of eight capital cities.
    (b) Base: 1989-90 = 100.0.
    (c) Base: June quarter 2002 = 100.0.

      Table 3: Measures of underlying trend inflation, Percentage changes (a)

      Period
      All groups CPI
      All groups CPI, seasonally adjusted
      16th series seasonal
      adjustment methodology
      15th series seasonal
      adjustment methodology
      Trimmed mean
      Weighted median
      Trimmed mean
      Weighted median
      PERCENTAGE CHANGE (from corresponding quarter of previous year)
      2007
      June
      2.1
      2.1
      2.8
      2.8
      2.7
      2.8
      September
      1.9
      1.9
      2.9
      2.9
      2.9
      3.0
      December
      3.0
      3.0
      3.5
      3.8
      3.4
      3.7
      2008
      March
      4.2
      4.3
      4.3
      4.6
      4.1
      4.3
      June
      4.5
      4.5
      4.5
      4.6
      4.3
      4.4
      September
      5.0
      4.9
      4.8
      4.9
      4.7
      4.8
      December
      3.7
      3.7
      4.3
      4.5
      4.2
      4.5
      2009
      March
      2.5
      2.3
      4.0
      4.4
      4.0
      4.4
      June
      1.5
      1.5
      3.5
      4.1
      3.6
      4.2
      September
      1.3
      1.3
      3.1
      3.9
      3.2
      3.7
      December
      2.1
      2.1
      3.3
      3.8
      3.2
      3.5
      2010
      March
      2.9
      2.9
      3.1
      3.5
      3.0
      3.1
      June
      3.1
      3.1
      2.8
      3.0
      2.6
      2.7
      September
      2.8
      2.8
      2.6
      2.6
      2.4
      2.3
      December
      2.7
      2.7
      2.1
      2.4
      2.2
      2.2
      2011
      March
      3.3
      3.3
      2.2
      2.4
      2.3
      2.2
      June
      3.6
      3.7
      2.5
      2.6
      2.7
      2.7
      PERCENTAGE CHANGE (from previous quarter)
      2007
      June
      1.2
      1.1
      0.9
      1.0
      0.9
      0.9
      September
      0.7
      0.6
      0.9
      1.0
      0.8
      0.9
      December
      0.9
      1.3
      1.2
      1.3
      1.1
      1.1
      2008
      March
      1.3
      1.3
      1.3
      1.3
      1.2
      1.3
      June
      1.5
      1.3
      1.1
      1.0
      1.2
      1.0
      September
      1.2
      1.0
      1.2
      1.2
      1.1
      1.2
      December
      -0.3
      0.1
      0.7
      0.9
      0.6
      0.9
      2009
      March
      0.1
      0.0
      1.0
      1.1
      0.9
      1.2
      June
      0.5
      0.4
      0.6
      0.8
      0.9
      0.8
      September
      1.0
      0.8
      0.8
      1.0
      0.7
      0.8
      December
      0.5
      0.9
      0.8
      0.9
      0.6
      0.6
      2010
      March
      0.9
      0.8
      0.8
      0.9
      0.8
      0.8
      June
      0.6
      0.5
      0.4
      0.3
      0.5
      0.5
      September
      0.7
      0.5
      0.5
      0.5
      0.5
      0.5
      December
      0.4
      0.8
      0.4
      0.7
      0.3
      0.5
      2011
      March
      1.6
      1.4
      0.9
      0.8
      0.9
      0.8
      June
      0.9
      0.9
      0.7
      0.5
      0.9
      0.9
      Note: (a) Weighted average of eight capital cities.