At that time there were only two events, and only for part of the time: a parents meetup (18-19) and a high-school student meetup (19-20). So no simple to adjust bias I could see :)
At that time there were only two events, and only for part of the time: a parents meetup (18-19) and a high-school student meetup (19-20). So no simple to adjust bias I could see :)