<unk> <unk> <unk> <unk> <unk>  Transit: Some 4.2 million immigrants arrived between 1945 and 1985, about 40 per cent of whom came from Britain and Ireland. The 1957 novel They're a Weird Mob was a popular account of an Italian migrating to Australia, although written by Australian-born author John O'Grady. La population australienne a atteint 10 millions en 1959<unk>avec Sydney sa ville la plus peuplée.  Question: How many immigrants arrived?
<unk> 4.2 millions