Over 90 percent of the 10 million people in Cambodia are ethnic Khmers, descendants of the original population in the area. The largest minority groups are the Chinese (about 61,000) and Vietnamese (estimated at 56,000). Other minorities include small tribal groups known as hill tribespeople that live in the mountains of the country. More information on the ethnic Vietnamese may be found in the chapter on Vietnam in Volume 9. Information on the Chinese can be found in the chapter on China in this volume.