What is the highest population of the region with a rank bigger than 9?
CREATE TABLE "with_population_above_10_million" (
  "rank" real,
  "country_region" text,
  "population" real,
  "area_km_2" real,
  "density_pop_per_km_2" real
);
SELECT MAX("population") FROM "with_population_above_10_million" WHERE "rank">9;