CREATE TABLE table_43498 ("Official Name" TEXT, "Status" TEXT, "Area km 2" FLOAT, "Population" FLOAT, "Census Ranking" TEXT)

Which census ranking is 57.06 km big?
SELECT "Census Ranking" FROM table_43498 WHERE "Area km 2" = '57.06'
SELECT "Census Ranking" FROM "table_43498" WHERE "Area km 2" = '57.06'