From what I can gather from another thread this is because no one has yet added a question about it. They use a system where the country tags grow as people add to them. Plenty of us have made suggestions that perhaps they should have a fixed list of all countries/regions and allow people to add questions to those categories as and when. To be fair there may be plenty of places without questions for now (especially until they get plenty of new posters) but surely that is a better system?