WHY DO SO FEW FEMALE COMPOSERS PARTICIPATE IN THIS FORUM’S COMPOSER CHALLENGES?

I recently posted a Composer Challenge to score a sequence in CAST AWAY.

If I counted correctly, 31 composers rose to the challenge.  

If I am not mistaken, only one of those composers was a woman.

That is only 3% of the applicants for this particular assignment.

What reasons might there be for this? How might that be extrapolated further?