CREATE TABLE table_203_221 (id DECIMAL, "name" TEXT, "nationality" TEXT, "matches played" DECIMAL, "goals scored" DECIMAL, "notes" TEXT)

after australia , what nation has the highest number of players for melbourne ?
SELECT "nationality" FROM table_203_221 WHERE "nationality" <> 'australia' GROUP BY "nationality" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "nationality" FROM "table_203_221" WHERE "nationality" <> 'australia' GROUP BY "nationality" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1