Oct. 27 (UPI) -- The world's oldest president, Paul Biya, was elected Cameroon's leader again, a title he's held since 1992. Biya is 92, and at the end of his term will be 99 years old . The median age in Cameroon is 18.9. For contrast, the median age in the United States is 38.7. According to Cameroon's constitutional council, Biya won 53.66% of the vote . His challenger Issa Tchiroma Bakary won 35.19%. But Tchiroma Bakary is claiming victory. Two days after the Oct. 12 election, Tchiroma