Name the total number of roll for state authority and stanley avenue school with decile more than 5
CREATE TABLE "matamata_piako_district" (
  "name" text,
  "years" text,
  "gender" text,
  "area" text,
  "authority" text,
  "decile" real,
  "roll" real
);
SELECT COUNT("roll") FROM "matamata_piako_district" WHERE "authority"='state' AND "name"='stanley avenue school' AND "decile">5;