The prices are based roughly on a mix of population and GDP, so whilst Oceania may be much more affluent than Africa they have a much smaller population size (as of 2013 Oceania's population was about 38 million whilst Africa's was about 1.1 billion).
The prices are based roughly on a mix of population and GDP, so whilst Oceania may be much more affluent than Africa they have a much smaller population size (as of 2013 Oceania's population was about 38 million whilst Africa's was about 1.1 billion).