Connections by connection method
Unique players by connection method
Connections vs unique players by connection method
There's lots of ways to dice and present this data, and much more data is available than the link above.
It'd be great if analytics enthusiasts would take the data and do their own analysis/present it better.
Feel free to make requests for alternative data. Fundamentally we have every connection with timestamp, player name, SteamID, IP:port and connection method. We can also derive other data from surrounding log entries (e.g. duration played based on connection method, connections by number of players on server at the time etc).
You probably don't want to re-use my code as I have NFI what I'm doing and basically stole templates from nvd3.