The majority of the people in Cuba are of Spanish descent. Some are descendants of African slaves and about one percent are of Chinese origin. The Cuban government has placed an emphacis on health and education, and as a result, Cuba ranks third in the world in regards to the number of physicians per capita. In 2006, Cuba had 530 doctors per 100,000 people. Private hospitals and medical insurance are illegal in Cuba. The government provides free medical care for all of Cubans citizens. About 75 percent of the Cuban population resides in urban areas. Havana, with a population of about 2.2 million, is the capital and largest city. It is nearly five times larger than the next largest city, Santiago de Cuba.