Many people say, why all UFO comes on US or North America? Why strange things only happens in western world.
I think we have to think little farther. Other parts of world are not as developed as western part. So, in most cases people don't have anything to take video or even take a picture. And if it happens in front of illiterate people, they take it as a ghost or other thing. So, we can't think good result or sample of any strange situation.