In 1962, the population of the Montagnard people in the Central Highlands was estimated to number as many as one million. Today, the population is approximately four million, of whom about one million are Montagnards. The 30 or so Montagnard tribes in the Central Highlands comprise more than six different ethnic groups who speak languages drawn primarily from the Malayo-Polynesian, Tai, and Austroasiatic language families. The main tribes, in order of population, are the Jarai, Rade, Bahnar, Koho, Mnong, and Stieng.