{"metric":"prison_population_by_establishment","unit":"people","geography":"K04000001","note":"Every published estimate for every period, oldest release first. A period appearing more than once was revised.","vintages":[{"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","source":{"sheet":"MonthlyBulletin","table":"Monthly Bulletin","row":"Total","column":"Population *","raw_value":"86267"}}]}