Immigration to Norway, where 18% of the population is composed of immigrants:
"The main waves of immigrants in the 20th and 21st century were caused by wars and riots in the migrants' home countries: Jews from eastern Europe early in the 20th century, refugees from Hungary in the 1950s, from
Chile and Vietnam in the 1970s. In the mid-1980s, there was an increase in the number of asylum seekers from countries such as
Iran and Sri Lanka. In the 1990s, war refugees from the
Balkans were the predominant immigrant group accepted into Norway; a large number of which have since returned home to Kosovo. Since the end of the 1990s, new groups of asylum seekers from countries such as
Iraq, Somalia, and Afghanistan arrived.
From 2000 to 2010, 510,748 persons received permanent residence permits.
In 2012, net immigration was 47,300, a national record high. About 62% of the immigrants were European citizens.The largest immigrant groups were Poles and Lithuanians who mainly came as labour immigrants, followed by Somalis and Eritreans who mainly came as refugees.
Other countries in the top ten were Romania, Latvia, the Philippines, Spain, Afghanistan and Thailand."
https://en.wikipedia.org/wiki/Immigration_to_Norway