Ethiopia's population has grown from 33.5 million in 1983 to 75.1 million in 2006. The 2007 Population and Housing Census results show that the population of Ethiopia grew at an average annual rate of 2.6% between 1994 and 2007, down from 2.8% during the period 19831994. The country's population is highly diverse. Most of its people speak an Afro-Asiatic language, mainly of the Semitic or the Cushitic branches. The Oromo, Amhara, Tigray and Somali make up three-quarters of the population, but t