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7. Idriss Déby Itno

Country: Chad
In power since: 1990
Population: 10.2 million

1990 GDP per capita: $726
2010 GDP per capita: $1,653
GDP per capita change since 1990: +127.7%

Human Development Index 2010
Rank: 163rd
Score: 0.295

Transparency International CPI 2010
Rank: 171st
Score: 1.7

Chadian President Idriss Déby Itno came to power in 1990, in a coup d'état that ousted former president Hissène Habré, who was also his former ally.

Ever since taking power, President Déby's government has been accused of corruption and political repression despite claiming to be democratic. In 2005, a referendum was successfully held, allowing Déby to run for a third consecutive term.

Most recently, the United Nations Office for the Coordination of Humanitarian Affairs reported that President Déby spent the first $3 million of profits from a $3.7 billion oil pipeline on weapons, instead of education, health and infrastructure.

Photo: Sonia Rolley | AFP | Getty Images