In every country people are overestimating the share of the foreign-born population. (from http://OurWorldInData.org )pic.twitter.com/MtT0No3Ue3
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Another detail: The data are old, so we can find cases such a low number of immigrants for Spain.
For example, for 2015, we have 6,162,932 foreign-born in Spain (13.27 per cent of the population).
Denmark in 2001 was at 7.4% according to legal definition. Obviously too small if using genetic def.
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