The African population grew 10 to 12 fold in the past 100 years.
Washington has had a significant African American population since the city's foundation.
"The risk of resistance in most African populations right now is very low or zero," he said.
Even at independence in 1961, probably not more than ten per cent of the country's African population could read and write.
This poor treatment of indigenous and African populations would continue though the colonial period.
The African American population continued to increase, making up 98% of the residents by 1990.
In 2010, the African American population had increased to 91.7 percent.
The census of 1945 was better, but still not a true record of the African population.
An important part of the African population also inhabited other provinces.
It is only known to have been found in an African population.