I'm confused by the legend, which says it is based on "percent liberal minus percent conservative." It looks like women started out as a 10 in South Korea and went to a 30. Trying to imagine numbers that might produce a 10, I think 55% liberal, 45% conservative would do it, because 55 - 45 = 10. Since it went up to 30, I think that means the numbers shifted to something like 65% liberal, 35% conservative.

But this doesn't seem to make much sense in the UK. There, the number went up to 50 for women. Wouldn't that mean it is something like 75% liberal 25% conservative? Because that seems incredibly unlikely. I very much doubt that 75% of women in the UK identify as politically liberal.