What year were the retired serial numbers 27317–27336?
CREATE TABLE "4_6_2" (
  "class" text,
  "wheel_arrangement" text,
  "fleet_number_s" text,
  "manufacturer" text,
  "serial_numbers" text,
  "year_made" text,
  "quantity_made" text,
  "quantity_preserved" text,
  "year_s_retired" text
);
SELECT "year_s_retired" FROM "4_6_2" WHERE "serial_numbers"='27317–27336';