Here are the results of the latest usage data as of 05 October, 2017. If you'd like to compare, here is the last usage data result from February 2017.
It took me a bit longer than I would have liked to compile the graphs while working around the 11.10 beta, but we now have a handful of easy-to-digest charts, plus the raw data at the bottom of the post for those that are interested.
Items of note
All data in these charts are for users of the full version only—we’ve filtered out demo users.
If an aircraft's name, studio, or number of engine fields in Plane Maker are changed at any point, the aircraft will show up in the data as two different entries.
There are four files here: hardware data and aircraft data, for X-Plane 10 & 11. Each contains all the information we have since September 2015, for paying customers only (no demo users).