How many Americans have voted early so far?

Early voting is exactly what it sounds like - it's where people are allowed to vote before the scheduled election day.

This can be either in-person at early voting stations, or absentee - that is, by post. In-person early voting is common in Finland and Canada, while Switzerland, Germany and the UK accept postal votes.

In the US, this means people are able to cast their ballots before 3 November - either by post or in-person.

Early voting has steadily increased with each election year. The number of people who...