It's not about population. It's about those that are able to take the vaccine.
I think the UK govt website is more to be trusted than a bunch of people touting for funds by donation using real world problems to induce people into supporting their intellectual lifestyles.
Just a "charity" that appears to compile data and publish it on a fancy web page. Brilliant! Why didn't I think of that. Oh yes, that's right, I'm not an intellectual, bummer.