Australia's 86% urbanised - so about twice as much "non-urban". Of course the costs to service those areas are likely higher, but it'd be hidden in cross-subsidies. It seems it would be much better for the government to transparently pay the subsidy for non-economic areas (which is worth definitely worth paying!) rather than hide it in the overall NBN pricing.

https://www.statista.com/statistics/260498/degree-of-urbaniz...