New research shows a rising number of the Australian adult population are not enrolled, not casting a vote or voting informally. 

Combined with the sinking major party vote, nearly 40% of Australian adults did not vote for either party able to form government in 2013. The trend has been on the rise over the past decades, but sharply increased in the past two elections.

A new report by independent think-tank, The Australia Institute, investigates voting trends, showing a significant decline in major party voting over many decades.