Nigeria

There are about 75.000 registered doctors in the Nigerian health service, but more than 33.000 of them have left the country.

An excerpt from the article 19 facts about Nigeria

Nigeria’s health care system is facing a shortage of doctors due to the emigration of qualified professionals to North America and Europe - in the late 1990s, about 21.000 Nigerian doctors were practicing in the United States alone, roughly the number employed in the Nigerian public health service.