CREATE TABLE table_72470 ("Country" FLOAT, "Rank" TEXT, "Aid" TEXT, "Trade" TEXT, "Investment" TEXT, "Migration" TEXT, "Environment" TEXT, "Security" TEXT, "Technology" TEXT, "Overall  ( Average ) " TEXT)

What country has a 5.5 mark for security?
SELECT "Rank" FROM table_72470 WHERE "Security" = '5.5'
SELECT "Rank" FROM "table_72470" WHERE "Security" = '5.5'