Nigeria led sub-Saharan charge with $8,761,051 in BTC traded volume.
That comes to $1.25m a day, or to help you visualize the amount of revenue a Walmart superstore or a Costco generates a day, now, since we're talking about a country of 200 million, how does this volume of 20 cents per citizen per month sound like?
How can we be sure that these are the real volumes? There are dozens (if not hundreds) of P2P platforms, and it is very difficult to get a clear picture on a country-by-country basis. Also, not many of the P2P platforms publish these sort of trade volumes. Some like Localbitcoins do, but they now require KYC verification and many of the users don't even consider them as P2P. And in a country like Nigeria, where the government is openly hostile towards cryptocurrency, I am sure that the users will try to hide their real identity and volumes as much as possible (as I have seen here in India as well).