, there were 423,494 people with a foreign background living in Finland (7.7% of the population), most of whom are from the former Soviet Union, Estonia, Somalia, Iraq and former Yugoslavia. The children of foreigners are not automatically given Finnish citizenship, as Finnish nationality law practices and maintain ''jus sanguinis'' policy where only children born to at least one Finnish parent are granted citizenship. If they are born in Finland and cannot get citizenship of any other country, they become citizens. Additionally, certain persons of Finnish descent who reside in countries that were once part of Soviet Union, retain the right of return, a right to establish permanent residency in the country, which would eventually entitle them to qualify for citizenship. 387,215 people in Finland in 2018 were born in another country, representing 7% of the population. The 10 largest foreign born groups are (in order) from Russia, Estonia, Sweden, Iraq, Somalia, China, Thailand, Serbia, Vietnam and Turkey.