A third of the films accepted for the directors' fortnight portion of the Cannes film festival were directed by women. That this counts as a respectable ratio is sadly par for the course when it comes to directing. And Cannes includes films from around the world; the proportion of Hollywood movies directed by women is 7 percent.
This fact was discussed in a recent LATimes interview with Jodie Foster:
"I don't think it's a plot and these guys sat around and said let's keep these women out," Foster said. "I think it's like race psychology. When a producer hires a director, you're hiring away your control completely. You're bringing on somebody that will change everything. When you give that amount of power up, you want them to look like you and talk like you and think like you and it's scary when they don't, because what's gonna happen? I'm gonna hand over $60 million to somebody I don't know. I hope they look like me."
This is plausible as a partial explanation; it dovetails with the idea that hiring exclusion can arise out of an unstated desire to surround yourself with people like you who make you comfortable. But it gets more interesting: