I'm pretty sure that at this point last year (2012) we were well under 20k tickets sold, I think under 19k. It's the annual Desmond Conner camp post. Season ticket sales numbers.
If my math is right, and I'm a terrible mathematician - 50% of 19 is 9.5. Therefore a 50% increase since last year (given a 19k number sold) would be 19 +9.5 = 28,5k. See - shoot, I did the math wrong in my head before. Came up with 27k.
Assuming a 19k number sold (reported this time last year) - to see a 50% increase in season ticket sales, we would need to be at 28,5k. Is my math right?
if so - 23k, represents somewhere around a 20-25% increase in ticket sales. with a month to go.
Student tickets? If the 23k includes students, then I think it is a little less than I would hope. Hopefully we get closer to 30k by season start.