Before the publication of the 2007 census results, however, the U.S. State Department estimated that "approximately 45 percent of the population is Sunni Muslim." Roughly 68% of Ethiopian Muslims are Sunni, whilst 23% are non-denominational Muslims, whilst another 2% adhere to other sects such as Shia, Quranist, Ibadi etc. and some belonging to various Sufi orders. Islam first arrived in Ethiopia in 614 with the First Migration to Abyssinia. Addis Ababa, Ethiopia's capital city, is home to about 443,821 Muslims or 16.2%. While Muslims can be found in almost every community, Islam is most prevalent in the Somali (98.4%), Afar (95.3%) and Oromia (47.5%) Regions. Haile Selassie's government reportedly concealed the actual figures of the Muslim population in order to present Ethiopia as a Christian nation to the outside world. The writers of "Ethiopia: a country study" claimed that Islam made up 50% of the total population in 1991 based on the 1984 census commissioned by the Derg regime. Some web columnist even say the Muslim population are the majority and disagree with the current Ethiopian governments claims.