I'm looking for resources that give the the demographic breakdown of African nations for the time period 1880-1960 (so colonization), such as from censuses. Primarily, I need the european share of the population. Is anyone aware of various sources that are available that include this information? I'm willing to spend the time to digitize, but am a little lost where to even begin.
I'm also interested in agriculture production or exports for the pre-colonial period, particularly pre-1866. Again, I'm unsure where to even begin with this research. Any ideas?