All the rest have either preferential voting systems (Australia and France) or proportional representation in one form or another.

ECONOMIST: From the archive

The academy, through its accounting firm, now called PricewaterhouseCoopers, tabulates the ballots using what is called the "preferential voting" system.

NPR: For Geeks Only: How Oscar Voting Works

Yes, admits a Clegg ally, it now looks disastrous to have sought a referendum on the complicated preferential voting system known as the alternative vote (AV).

ECONOMIST: Bagehot