<Li> West Central Africa (Republic of Congo, Democratic Republic of Congo and Angola): 39.4% </Li> <Li> Southeastern Africa (Mozambique and Madagascar): 4.7% </Li> <P> Although the slave trade was largely global, there was considerable intracontinental slave trade in which 8 million people were enslaved within the African continent . Of those who did move out of Africa, 8 million were forced out of Eastern Africa to be sent to Asia . </P> <P> There were over 173 city - states and kingdoms in the African regions affected by the slave trade between 1502 and 1853 when Brazil became the last Atlantic import nation to outlaw the slave trade . Of those 173, no fewer than 68 could be deemed nation states with political and military infrastructures that enabled them to dominate their neighbours . Nearly every present - day nation had a pre-colonial predecessor, sometimes an African Empire with which European traders had to barter . </P>

What factors resulted in the depopulation of the african population beginning in the 17th century