9. Slovenia
Percentage of foreign-born residents: 16.1
Slovenia has been a popular target for refugees during the Yugoslavian Civil War in the 1990s, which is a contributing factor to its position on this list of most multicultural countries in the world. Another one is the fact that many of its foreign-born residents have become ones overnight, following the breakup of Yugoslavia, as many Slovenians have been born in other Yugoslav republics, like Croatia and Serbia. This doesn’t make them migrants, but for the purpose of the OECD study, they are born in foreign countries.