Survey: If the whole world could move tomorrow

How would the world change if everyone who wanted to move to a different country was able to do so? Gallup asked "nearly half a million adults in 152 countries" whether they wanted to move and, if so, where they'd go. Here's what they found:

• Where populations would explode: New Zealand (+231%), Singapore (+225%), Iceland (+208%), UAE (+204%), Switzerland (+187%).
• Where they'd decline: Sierra Leone (-70%), Haiti (-63%), Liberia (-60%), Democratic Republic of the Congo (-50%), Nigeria (-46%).
• The population of the U.S. would rise by 46% to 476 million.