Scoring: South Africa

• Date of joining: 1961-05-31 (replacing the Union of South Africa)
• Expected count from Wikipedia: 3 Prime Ministers (Hendrik Frensch Verwoerd onwards) + 2 State Presidents (Pieter Willem Botha onwards) + 5 Presidents (Nelson Mandela onwards)
• Number in Wikidata: 5
• PositionHolderHistory warnings: 1
• Score: 48/100 = 48%

The Prime Ministers and State Presidents are not findable until the “office held by Head of Government” statement is updated to include those positions.