What is the sum of Natural Change, when Natural Change (Per 1000) is greater than 5.4, when Crude Death Rate (Per 1000) is less than 14.3, when Live Births is less than 6,950, and when Crude Birth Rate (Per 1000) is less than 28.2?
CREATE TABLE "vital_statistics" (
  "average_population_x_1000" real,
  "live_births" real,
  "deaths" real,
  "natural_change" real,
  "crude_birth_rate_per_1000" real,
  "crude_death_rate_per_1000" real,
  "natural_change_per_1000" real
);
SELECT SUM("natural_change") FROM "vital_statistics" WHERE "natural_change_per_1000">5.4 AND "crude_death_rate_per_1000"<14.3 AND "live_births"<'6,950' AND "crude_birth_rate_per_1000"<28.2;