International Mathematical Olympiad Cumulative Results by Country until now(imo-official.org)
imo-official.org
International Mathematical Olympiad Cumulative Results by Country until now
https://www.imo-official.org/results_country.aspx?column=awards&order=desc
2 comments
Females participation is very low.
None of Arab states is among the top 50.
From The Middle East, only Iran appears in the top 20 countries (12th).