From the U.S. creation of AFRICOM to now, terror attacks in Africa have increased from 2% of attacks globally to 43%, general in charge of AFRICOM testified. Take a wild guess how congress responded to this!
https://www.kenklippenstein.com/p/congress-fawns-over-failed-general
https://www.kenklippenstein.com/p/congress-fawns-over-failed-general
Comments
Africa terror / Global terror.
This means that the % itself is not independent from influence by other sources of terror.
Tldr the thing measured relies on the rest of world too, not just Africa.