It occurs to me that a chart like this is a good way to illustate Queensland’s long, strange electoral history since the onset of the Joh era. Results obtained from the Australian Government and Politics Database, product of the world’s finest political science department.
UPDATE: Why stop there. This chart goes back to 1926, late in the life of the Labor government that came to power in 1915; before that the various conservative groups are too hard to categorise. The Queensland People’s Party and United Australia Party are counted as Liberal.