West Papua or Western New Guinea was annexed by Indonesia from the Netherlands in 1969 and is the western half of the island of New Guinea and smaller islands to its west. The region is administered as two provinces: Papua and West Papua. The eastern half of New Guinea is the country of Papua New Guinea. The population of approximately 3.6 million comprises ethnic Papuans, Melanesians, and Austronesians. The region is predominantly dense forest where numerous traditional tribes live such as the Dani of the Baliem Valley, although the majority of the population live in or near coastal areas. The largest city in the region is Jayapura. The official and most commonly spoken language is Indonesian. Estimates of the number of tribal languages in the region range from 200 to over 700, with the most widely spoken including Dani, Yali, Ekari and Biak. The predominant religion is Christianity (often combined with traditional beliefs) followed by Islam.