Scoring: Singapore

• Date of joining: 1965-09-21
• Expected count from Wikipedia (all): 3
• Number in Wikidata: 4
• PositionHolderHistory warnings: 6
• Score: 8/30 = 27%

This score is much lower than it really should be, because the erroneous inclusion of Ong Teng Cheong (who, as I understand it, should have been entered into Wikidata as Deputy Prime Minister instead) causes a disproportionately high error rate compared to the size of the dataset.