These are the activity statistics for the four main channels in BDI:
Monthly stats are run on over a 30 day period every Sunday afternoon by Nymphetamine, give or take.
Yearly stats are collected from January 1st to the last Saturday of every week right after monthly stats are run. They have been restarted for 2018.
The 2017 stats collected from January 1st to December 31st, 2017. (There were a couple of days where the bot was offline and incomplete, but otherwise, these stats are complete.)
All logs are taken from the Murphy bot. All times are Pacific Standard (-8 GMT).