Recent average players and total users, each point represents a two-hour block of samples averaged together.
It'll be wrong if the usage tracker has recently been reloaded and isn't full with data yet
Also, it doesn't skip invisible people (players don't have access to this from in-game), so if I ever care about that then I would have to change the usage thing.
I should note that the T-20 column is only there to make the graph have a multiple of 5 spaces... this uses 20 data points, 0-19