What kind of Live births has a Migration of -14 873?
CREATE TABLE "vital_statistics" (
  "average_population_x_1_000" text,
  "live_births" text,
  "deaths" text,
  "natural_change" text,
  "migration" text,
  "crude_birth_rate_per_1_000" real,
  "crude_death_rate_per_1_000" real,
  "natural_change_per_1_000" real,
  "migration_per_1_000" real
);
SELECT "live_births" FROM "vital_statistics" WHERE "migration"='-14 873';