I’ve tweaked the way that the existing reports of usage data are being generated. For each type of report, we now include the bundle information (symbolic id and version). With this, you can see how many users are using particular versions of views, editors, commands, etc. You can browse the reports, or download CSV-formatted versions of the data to do your own number crunching (sadly, the additional information makes reviewing the data in your browser rather unattractive; should I just get rid of browser-viewing, and defer completely to the CSV files?)
Keep in mind that the numbers will overlap a bit. Any users who upgrade mid-month would be included in the count for two versions.