An estimated 65 languages are spoken in Côte d'Ivoire. One of the most common is Dyula, which acts as a trade language. French, the official language, is taught in schools and serves as a lingua franca in the country. There are only 12 physicians per 100,000 people. About a quarter of the population lives below the international poverty line of $1.25 a day. 4% of the population is of non-African ancestry. Many are French, Lebanese, Vietnamese and Spanish citizens, as well as Protestant missionaries from the United States and Canada.