Formulation of Charts
The ARIA charts are based on data collected from a number of traditional "bricks and mortar" retailers around Australia. Both the Top 40 Digital Track Chart and the Top 100 Singles Chart include data from online retailers including iTunes and BigPond music. Starting from 8 October 2006, due to low physical single sales at the time, the official ARIA singles chart included online data as well as physical sales. In 2006, it was announced that the Brazin retailing group, comprising major retailers HMV, Sanity and Virgin music/DVD stores would no longer contribute sales data to the ARIA charts. However, after a five month absence, Brazin reportedly re-commenced contributing sales figures to the ARIA Charts on 26 November 2006.
Read more about this topic: ARIA Charts
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