In November 2011, a survey was posted on /r/programming, which is a subreddit of Reddit. At the time, r/programming had about 345 000 subscribers. A total of 2502 individuals (n), which is 0.73% of the subscribers, clicked the link to the survey.
The raw data from the study can be downloaded from here (thanks TinyUpload!).
The raw data from the study can be downloaded from here (thanks TinyUpload!).