Thanks Hulababy.
I imagine they left it the same as it's a good way to see if last years spike was manipulation or just a strange anomaly (though I read statisticians thought the latter unlikely).
My betting is that most people would bet the threshold would be higher, so if it's due to manipulation the spike will move to 33/34 (though less spiky, more of a hump). If it was just a strange anomaly, then it should form a more standard curve this time.