I know most Jamaicans are of African descent but what percentage of those people have any kind of European ancestry. (For example, 1/4 white or 1/8 white)

I am asking this question because Jamaica and Haiti both are predominately black nations but it is still possible to tell the difference between them.
Jamaica has a higher frequency of brown and light skinned people than Haiti, even though most people in both nations are darker skinned black people.

African Descent, Asking This Question, European Ancestry, Haiti, Higher Frequency, Jamaica, Light Skinned People