GABON Prime minister Léon M'ba 1902-1967 Prime minister 1957-61 Léon Mébiame 1934 Prime minister 1975-90 Casimir Oyé-Mba 1942 Prime minister 1990-94 Paulin Obame-Nguema 1934 Prime minister 1994-99 Jean-Francois Ntoutoume 1939 Prime minister 1999-2006 Jean Eyeghe Ndong 1946 Prime minister 2006-09 Paul Biyoghé Mba 1953 Prime minister 2009-