The latest news on this front comes from a really interesting article at Ballot Access News written by the widely-respected election expert and advocate for third party/independent ballot access Richard Winger. Take a look at this excerpt:
The Electoral Reform Society of the United Kingdom has published this chart, by Dylan Difford. It shows turnout in advanced democracies for the last election for the national legislative body. It clearly shows that countries that use proportional representation have higher voter turnout than countries that don’t. The United States is listed, as the country with the third-weakest turnout. Countries with proportional representation are in purple.
Australia is an exception in the chart. It has the highest turnout and it does not use proportional representation. But Australia has compulsory voting. Thanks to Fairvote for the link.
Continue reading here.