@intparent Yes, it looks like HMC started aiming for a better male:female ratio before Caltech.
Incoming freshman by year at Caltech:
Class of '16: 37% female
Class of '17: 35% female
Class of '18: 40% female
Class of '19: 46% female
Class of '20: 44% female
Class of '21: 46% female (from web page; CDS not yet released)