This data cube provides six tables containing the 16th series Australian Consumer Price Index (CPI) weights and average weekly household expenditure. The 16th series weights were derived from the 2009–10 Household Expenditure Survey (HES) and other data sources. An explanation regarding the data in each table is set out below. Any discrepancies between totals and sums of components in this publication are due to rounding.

**Table 1. CPI weights, June quarter 2011, Weighted average of eight capital cities**, shows the percentage contribution of each CPI group, sub–group and expenditure class to the All groups CPI for the weighted average of eight capital cities. Each column will add to 100%. Each component series will add to the next level. e.g. the weights for expenditure classes 'Bread', 'Cakes and biscuits', 'Breakfast cereals and other cereal products' will add to the sub–group 'Bread and cereal products' which, along with the other sub–groups, will add to the group 'Food and non–alcoholic beverages'.

**Table 2. CPI weights, June quarter 2011, Eight capital cities and Weighted average of eight capital cities**, is similar to Table 1 but shows the weights for each capital city as well as the weighted average of eight capital cities. The final column, weighted average of eight capital cities, in this table matches Table 1.

**Table 3. CPI weights, June quarter 2011, Capital city percentage contribution to the Weighted average of eight capital cities**, shows the percentage contribution of each city to the weighted average of eight capital cities by group, sub–group and expenditure class. In this table, each row will add to 100%. For the expenditure class 'Bread', Sydney (33.38%) and Melbourne (27.57%) contribute the most to the weighted average of eight capital cities for this expenditure class. Darwin (0.96%) has the smallest contribution.

**Table 4. Points contribution to All groups CPI, June quarter 2011, Eight capital cities and Weighted average of eight capital cities**, shows the index points contribution of each CPI group, sub–group and expenditure class to the All groups CPI for the eight capital cities and the weighted average of eight capital cities. Each column will add to the 16th series June quarter 2011 All groups CPI index number. This table shows the same information as Table 2 but expressed in a different way. For example, the points contribution of 'Water and sewerage' in Sydney (1.46) to the All groups CPI index number, Sydney (177.6) is 1.46/177.6 = 0.82%. This is equivalent to the percentage contribution of 'Water and sewerage' in Sydney to the All groups CPI, in Table 2.

**Table 5. CPI average w****eekly ****household**** expenditure, June quarter ****2011, Eight capital cities and Weighted average of eight capital cities**** ($)**, shows the average weekly household expenditure (in June quarter 2011 dollars) by capital city and the weighted average of eight capital cities by group, sub–group and expenditure class. This data was used to construct the 16th series CPI weights. For example, the average weekly expenditure for 'Fruit' in Adelaide is $19.69 out of the total average weekly expenditure for Adelaide of $1,189.57. This proportion, $19.69/$1,189.57 = 1.66%, is the same as the percentage contribution for Fruit to the All groups CPI for Adelaide, found in Table 2.

**Table 6. Comparison between the 15th and 16th series CPI weights, Weighted average of eight capital cities**, shows the comparison between the 15th series CPI weights in the June quarter 2005 and the 16th series CPI weights in the June quarter 2011 for each group, sub–group and expenditure class at the weighted average of eight capital cities. Each column will add to 100%. Please note there is a number of changes resulting from the introduction of the 16th series which should be considered when comparing the 16th series weights to the 15th series weights. These include an updated commodity classification and changes in coverage.

Please note the weights and average weekly household expenditure represent the average across all households, not an "average" or "typical" household. More information on the 16th series weights and other changes can be found in the Information Paper: Introduction of the 16th series Australian Consumer Price Index, Australia, September 2011** **(cat. no. 6470.0).

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