With half of the relays using Cloudflare can we be really sure that this is the correct regional relay distribution? 
https://image.nostr.build/4367b0e32122b9abc2e9a77ba4d37d977cb2a3904c13c27e2140897b91f23f50.jpg  

 No, it’s possible that you’re correct and the data on this slide is not accurate. The list is also not comprehensive.