Is there a way to access stats of how many tickets were sold by week last year??

And then compare them to this year. I just really want to know how the sales of last year will compare to this year.

Not just people saying the line up sucks or guessing but accurate numbers.

I remember last year they said it was sold out but I went on Ticketmaster Friday (of the first day last year) morning and was still able to pull 3 day passes. I'm not really sure why that was.