Throw in the fifth Nordic country (Iceland), which is about the same as St. Louis city, including zipjet :)
The population of the City of St. Louis (~325k) is a bit misleading. The metropolitan statistical district of St. Louis is about 2.8M.
When I cruised the Alaska coast and visited the "cities" I was surprised to find these cities had lower populations than some subdivisions here or municipalities.
ij
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes