Note that there was no survey in 2017 so that data point can be removed. The surveys in all of these years were open for different amounts of time and advertis

Note that there was no survey in 2017 so that data point can be removed. The surveys in all of these years were open for different amounts of time and advertised on different platforms at different frequencies. I think primarily they show the limit on the number of people willing to take an online survey. The big jump from 2014 to 2015 coincides with the emergence of the Clojure Slack community. As a real-time chat platform it tends to collect more people and make it easier to find people in the community that are available right now to answer a survey. I think it is very hard to conclude from this data alone anything useful about the number of users of Clojure. I watch metrics on a number of platforms (some public, some private) and my sense right now is that there at least a small spike happening over the last few months, but again it's very difficult to conclude anything with certainty.