In the Oz (tables at bottom).
A difference between Latham v Howard (2004) and Abbott v Rudd (2010): Latham generated the (at the time) highest approval ratings for an opposition leader. Abbott hasn’t (and won’t) done that.
But Latham also pushed the then PM’s approval up, while Abbott has dragged his opponent’s down. Well, Rudd has done much of that himself with his manic insecurity.