I found this when living in Thailand, where it was difficult to walk out of a Doctors without a prescription for a drug and a collection supporting medications like anti-mucus and pain killers, I think because the hospitals accessible to foreigners were private and made bank on the pharmacy. Not that we saw the GP for most infections, common in that atmosphere, instead just buying antibiotics over the counter as needed. Here in regional Australia, maybe we just hit a good GP, and in the rare cases we get to actually see them never prescribes antibiotics unless pretty darn sure it is an infection. And of course we can't just get them over the counter, as even pharmacists apparently can't be trusted to prescribe them even if the green snot is visibly pooling behind your eyes.

So if Australia is top of the list, I'd certainly want to know more about the sources of the data. If hospitals have started giving out prophylactic antibiotics, that for example would skew the statistics and help identify the source of the problem.