Table schema:
CREATE TABLE table_name_38 (population INTEGER, region VARCHAR, regional_county_municipality VARCHAR, name VARCHAR)

Question: Cowansville has less than 16 regions and is a Brome-Missisquoi Municipality, what is their population?
SQL: SELECT MIN(population) FROM table_name_38 WHERE regional_county_municipality = "brome-missisquoi" AND name = "cowansville" AND region < 16