It’s cute when journalists try to do things with numbers. This is a very weird sentence. Firstly, what is number of AI startups per capita a metric of? Some AI startups are more important than others.
Secondly why are US and UK lumped together? I assume they don’t each have precisely 5.22 AI startups per 100k inhabitants, so is this the combined total of their populations? Why combine those two countries? Why not combine US and Canada, or UK and France, or US and Japan?