{"metric":"prison_population_by_establishment","unit":"people","geography":"K04000001","note":"One value per period: the newest published figure for that period. Use /vintages for every published estimate.","series":[{"period_start":"2026-07-01","period_end":"2026-07-31","period_label":"July 2026","value":86267,"status":"final","vintage":"2026-08-10","release_label":"July 2026"}]}