Adam wondered how including elections that were contested but lost would change the previous bar graph looking at upper boundaries to re-election. The change is significant. The darker party colour indicates a lost election.

Suddenly Howard and Whitlam jump Hawke in the list. Curtin and Chifley do not come off well either while McMahon lost the only election he contested as party leader.

A larger version of the same chart can be seen here.
Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.