CREATE TABLE table_51495 ("Rank" FLOAT, "Engine" TEXT, "Wins" FLOAT, "First win" TEXT, "Latest win" TEXT)

How many total wins with the latest win at the 1999 Italian Grand Prix at a rank of 15?
SELECT SUM("Wins") FROM table_51495 WHERE "Latest win" = '1999 italian grand prix' AND "Rank" > '15'
SELECT SUM("Wins") FROM "table_51495" WHERE "Latest win" = '1999 italian grand prix' AND "Rank" > '15'