Why does this graph show only 4 countries as if they are the top 4? Per capita, Sweden, Switzerland, Denmark, Austria, Norway all have more Nobel prizes per ca

Why does this graph show only 4 countries as if they are the top 4? Per capita, Sweden, Switzerland, Denmark, Austria, Norway all have more Nobel prizes per capita than UK. https://www.nejm.org/na101/home/literatum/publisher/mms/journals/content/nejm/2012/nejm_2012.367.issue-16/nejmon1211064/production/images/img_xlarge/nejmon1211064_f1.jpeg https://www.nejm.org/na101/home/literatum/publisher/mms/jour... Their statement "Accounting for population, it is the British who have accumulated the most Nobel prizes" is wrong.