How many total wins with the latest win at the 1999 Italian Grand Prix at a rank of 15?
CREATE TABLE "world_championship_grand_prix_wins_by_en" (
  "rank" real,
  "engine" text,
  "wins" real,
  "first_win" text,
  "latest_win" text
);
SELECT SUM("wins") FROM "world_championship_grand_prix_wins_by_en" WHERE "latest_win"='1999 italian grand prix' AND "rank">15;