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Johnen (surname) — Preceding unsigned comment added by 87.157.192.64 (talk) 13:38, 21 June 2015 (UTC)
There is no source for the list of prevalence by country and the entry for Australia seems way off. I cannot find a good source so I am proposing deleting this chart unless anyone objects here in the next few days. --Sisselpud (talk) 22:16, 2 May 2023 (UTC)