How many  Crude death rate (per 1,000) has a Migration (per 1,000) larger than -5.06, and a Natural change (per 1,000) larger than 7.06? Question 1
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 AVG("crude_death_rate_per_1_000") FROM "vital_statistics" WHERE "migration_per_1_000">-5.06 AND "natural_change_per_1_000">7.06;