In the Western Africa country of Mauritania, an estimated 10 to 20 percent of the population is enslaved. Based on their population of 3.4 million, up to 340,000 to 680,000 people are living as slaves in the country in 2012.
Mauritania was the last country in the world to abolish slavery in 1981. In 2007, the country enacted its first law making slavery a crime. Between 2007 and 2012, a total of one person was convicted of slavery.
Source: John D. Sutter, “Slavery’s last stronghold,” CNN, March 2012.