In 2017, only 17% of startups have a female founder

I apologize if this comes off as 'mansplaining', but I ask this with genuine curiosity:

Is the "only" a necessary qualifier in this? 17% is an impressive and laudable number; notwithstanding the plateau effect of recent years. Nearly a third of startup founders are women? That's a cool number I honestly would not have known about otherwise and to be genuine, never really even gave thought about.