How many in the introduced section had Fokker as a manufacturer, a quantity of 5, and retired later than 1999?
CREATE TABLE "list_of_braathens_aircraft" (
  "manufacturer" text,
  "model" text,
  "quantity" real,
  "introduced" real,
  "retired" real
);
SELECT SUM("introduced") FROM "list_of_braathens_aircraft" WHERE "manufacturer"='fokker' AND "quantity"=5 AND "retired">1999;