An issue with setting demographic based quotas is that they don't take into account the interest of said groups. While at least partially due to perception, ie seeing that aviation is 95% male can be discouraging to some women, it isn't simply a matter of setting a demographic for a class. Men and Women tend to gravitate towards certain fields based on interest, which could be argued til the end of time whether it is nature vs nurture, but most engineers are men, most nurses are women. Things vs people. Aviation is a "thing" field. A demographic quota doesn't make sense, and forces the wrong kind of hiring.
If you want to move the number, increase the interest in the groups you want, then continue to hire based on merit. Reference the multiple female demo pilots, show them it can be done, this can be you. Interest grows, hire those who can do the thing, the number moves.