Every year the world's passports are ranked according to how much power they wield.

Australia is in the top 10 once again, but for the first time in the 20-year history of the ranking, the US passport has fallen out of it.

Find out how passports are ranked, where the Australian one can take you and what led to the decline of the US passport.

How does the ranking work?

The Henley Passport Index is based on how many places travellers can access without a visa.

But the total score also includes countries that require passport holders to obtain a visa upon arrival, a visitor's permit or an electronic travel authority.

Henley & Partners bases its score out of 227 destinations, which includes countries as well as areas that aren't technically classified as countries, such as Taiwan.

Howev

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