CREATE TABLE table_42924 ("Rank" FLOAT, "Location" TEXT, "Total Passengers" FLOAT, "Annual change" TEXT, "Capacity" FLOAT, "Capacity in use" TEXT)

Which Rank that has a Total Passengers of 15,499,462?
SELECT COUNT("Rank") FROM table_42924 WHERE "Total Passengers" = '15,499,462'
SELECT COUNT("Rank") FROM "table_42924" WHERE "Total Passengers" = '15,499,462'