How many people lived in bulac in the year 2000?
CREATE TABLE "demographics" (
  "no" real,
  "barangay" text,
  "area_in_km_2" text,
  "rank" real,
  "population_2000" real,
  "population_2007" real,
  "population_2010" real,
  "population_density_2010" text
);
SELECT MAX("population_2000") FROM "demographics" WHERE "barangay"='Bulac';