Source: Statista
According to the Passport Index, holders of a passport issued in the United Kingdom or the United States can visit 147 countries. This makes them the most powerful passports in the world. The least powerful were named as being the Solomon Islands, Burma and South Sudan. Holders of these passports can only visit 28 countries worldwide. Read more in Statista's latest infographic feature in the Independent.
The chart above shows the number of visa free countries passport holders can visit in 2015.
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