I think routes, prevailing weather, average crew experience, average aircraft age, geographic (topographic features) , airspace complexity and about a thousand

I think routes, prevailing weather, average crew experience, average aircraft age, geographic (topographic features) , airspace complexity and about a thousand other things go into that accident statistics. I couldn't find solid numbers in my 2 min google search, but I would think English speaking countries are probably close to the top of the list in terms of safety. Plus there is a difference when South Korean maintenance personnel work on South Korean planes flow by South Korean crews, than just sending a US plane to the lowest contract bid in the developing world.