The data suggests that the gender variance relates with the societal mixing of genders. The low population countries might simply have large variance due to no

The data suggests that the gender variance relates with the societal mixing of genders. The low population countries might simply have large variance due to noise but for all countries in the 10s of millions population or higher there appears to exist an interesting signal. Part of obesity is potentially a true epidemic transmissible via human contact, and part of it may be societal norms that differ between genders in some countries more than in others.