How to Follow Up With Django Girls

Do you do any kind of follow up, any surveys, anything like that to track the results? So the total number of attendees, I know, is like 22,000 in 98 different countries. And at that time, I think it was of the respondents, we don't know, but like 20% or something ended up with doing something in tech. But there's two sides that there's going into tech, right?