Note that swedish children, like american children, are getting hit with HPV vaccine (2 doses a few months apart) from age 10-12, when their pubescent hormones are roaring through their veins. The CDC recommends HPV at 11-12. HPV contains large amounts of aluminum adjuvant, setting the stage for an autoimmune response to endogenous sex hormones.
Girls reach puberty a year or two before boys:
… On average, girls begin puberty at ages 10–11 and complete puberty at ages 15–17; boys generally begin puberty at ages 11–12 and complete puberty at ages 16–17 …
Differences in vaccination uptake and the timing of puberty may partially account for differences in GD rates between genders.