3412.0 - Migration, Australia, 2009-10 Quality Declaration 
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 16/06/2011   
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Estimated resident population (ERP) by country of birth are final for years up to and including 2005–06, revised for 2006–07, 2007–08 and 2008–09, and preliminary for 2009–10. See paragraphs 9–10 of the Explanatory Notes for further information.

For any distribution the median age is that age which divides the relevant population into two equal parts, half falling below the value, and half exceeding it. Where the age for a particular record has not been stated, that record is excluded from the calculation.