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Number of countries by region

Sovereign states as identified by Butcher and Griffiths (2020), Correlates of War (2017), and Gleditsch and Ward(2007).

AfricaAmericasAsia and OceaniaEuropeMiddle EastButcher and GriffithsButcher and Griffiths18162023185019001950100Gleditsch and WardGleditsch and Ward18162023185019001950Correlates of WarCorrelates of War18162023185019001950

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