Well you want your statistics to be somewhat accurate and not totally misleading.The reason they get condensed down is always to mislead and portray a narrative. Sadly it's always a victim-hood narrative instead of narratives of pride and respect.

Your graph is entirely misrepresentation a complex issue. In the United States, the wage gab for like-for-like jobs is only ~7%. And the primary reason for that is women tend to not ask for as much money as men when negotiating salary. You get the number larger by including house wives who don't work and also not matching like-for-like jobs (e.g. a high school teacher's salary and a chemists, just because they're both women).

When it comes to retail, hospitality, and almost all unskilled jobs, men and women are literally paid the same because it's the fucking law. When employers don't, it turned into massive lawsuits and PR nightmares.