First off accept that you'll never get a hard answer.
Second, it depends on a lot of factors.
Like when did the last TV ad air on the discovery channel.
Add into the complexity that maybe only half ever log into the TA when a trainer is around to point them in the right direction.
I've seen times when I'd see 40 - 80 new names a week. X 4 for the month, plus all the ones that went straight to main that I didn't see.
There are also times when it slows down that its down to perhaps 2 or 3 new guys a night, x 7 for 15 - 20 a week.
Also its hard to know how many of those subscribe, how many drop after their 2 weeks. How many just pop into the TA a couple of times, then start flying in main.
The good news, even during a lull, there is a constant trickle of fresh meat for the table.
Right now I think we are averaging about 1 to 2 an hour for primetime showing up in the TA asking the typical newbie questions.