I wanted to verify the claim from your post/wikipedia link, as I don't believe it's true, but it's kind of a shame that wikipedia accepts a link to a 238 page report as the citation for a claim. It should at least refer to a specific page or section in the report. I don't want to hunt through hundreds of pages of this report to verify the claim. The report also doesn't have any sort of "conclusions" section so there's no quick way to even verify that the report is saying what they claim it's saying, let alone find the data behind the claim.

However, I did a quick search for every sentence containing the word Australia, and found nothing that seemed to back up the claim.