See below a paper that was put online this month. Check Table 1 in page 11 for the country ranking normalized by number of inhabitants and GDP.
"Bibliometrics provides accurate, cheap and
simple descriptions of research systems and should lay the foundations for
research policy. However, disconnections between bibliometric knowledge and
research policy frequently misguide the research policy in many countries. A
way of correcting these disconnections might come from the use of simple
indicators of research performance. One such simple indicator is the number of
highly cited researchers, which can be used under the assumption that a
research system that produces and employs many highly cited researchers will be
more successful than others with fewer of them. Here, we validate the use
of the number of highly cited researchers (Ioannidis et al. 2020; PLoS Biol
18(10): e3000918) for research assessment at the country level and determine a country ranking of research
success"
