What is the lowest population for the area that has a density of 36.7?
CREATE TABLE "geography" (
  "name" text,
  "seat" text,
  "population_2011" real,
  "area_km_2" real,
  "density_inhabitants_km_2" real
);
SELECT MIN("population_2011") FROM "geography" WHERE "density_inhabitants_km_2"=36.7;