Estimates of the number of women contributing to F/LOSS vary. 3% is a generous guess. We’d like to see more. Download the poster. Distribute it. Help spread the word that F/LOSS needs women.
Addendum (9/February/2014): The preliminary results of FLOSS Survey 2013 (available here) have recently been released. Women make up 11% of contributors to F/LOSS projects. Looks like the poster is due for a revision!