Which country has a population of 3,221,216?
CREATE TABLE "demographics" (
  "country" text,
  "area_km" text,
  "population_2011_est" text,
  "population_density_per_km" text,
  "gdp_ppp_m_usd" text
);
SELECT "country" FROM "demographics" WHERE "population_2011_est"='3,221,216';