Because of the asymmetry of prosperity? Movement is gonna be one-sided from a lot of less prosperous countries. I think this list clearly reflects that: you are

Because of the asymmetry of prosperity? Movement is gonna be one-sided from a lot of less prosperous countries. I think this list clearly reflects that: you are ranked higher if movement is close to equilibrium (you have a country lots of people also want to move to or not a lot of people want to leave).