Help finding sources on the scandinavia having highest gender inequality in health and engineering. (from JRE podcast)

from 20:00 https://www.youtube.com/watch?v=04wyGK6k6HE

Paraphrasing: You see it particularly in scandinavia where they have done everything they can to equalize the playing field. It's 20:1 F to M nurses and 20:1 M to F engineers.

Been looking for the last half hour and can't find any papers or articles on this.