How many counties correspond to each police force?
SELECT Police_force ,  COUNT(*) FROM county_public_safety GROUP BY Police_force
SELECT Police_force ,  COUNT(*) FROM county_public_safety GROUP BY Police_force
[{'Police_force': 'Abbotsford Police Department', 'COUNT(*)': 1}, {'Police_force': 'Central Saanich Police', 'COUNT(*)': 1}, {'Police_force': 'RCMP', 'COUNT(*)': 4}]