Yes, I think that being in the top 5% is a requirement for being one of the highest. To be honest I would prefer to restrict "one of the highest" to the top 2.3%
Top 2.3% it is, then. However, the central theme of my point was that everyone (including ourselves) sees us as a rural nation, focusing on the outback, when we're actually a society of [sub]urbanites, despite the landmass.
Including all nations, it only drops to 17th - still in the top 10%.