[Mark McLeod]

Here's another year-to-year comparison of registration numbers by area.
This at the time of the graph in my previous post, so they can be compared.

I'll go review just where the bump came from in previous years, but I think it's just the surge after the weekend, as the week starts and teams start registering during normal business hours. The phenomena is more pronounced early in registration and the effect gradually lessens as time goes by and the registration graph levels out.
In the graphs we can see weekend plateaus and weekday climbs. It's more obvious when the graph is zoomed in.