The index is created by Walk Free, a human rights organization, and is based on data from the Global Estimates of Modern Slavery, produced by theInternational Labour Organization (ILO), Walk Free, andInternational Organization for Migration (IOM).

The countries with the highest prevalence of modern slavery include North Korea, Eritrea, Mauritania, Saudi Arabia, Turkey, and Tajikistan.

The countries with

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the lowest prevalence include Switzerland, Norway, Germany, Netherlands, and Sweden.