Are Ethiopians the Most Secretive People on Earth?

After weeks of rumors about the health and whereabouts of Ethiopia’s Prime Minster Meles Zenawi, the government finally announced his death from an "undisclosed illness" on August 21, 2012. There are many previous examples of such secrecy from Ethiopia, such as when Emperor Haile Selassie I tried to hide the 1973 famine, while Emperor Menelik II's death in 1913 was hidden from the public for years. Are Ethiopians the most secretive people in the world?