How many have done 8a and harder?

It is impossible to say how many have done an 8a. One way to come up with a guess is to use factor 3.5 for every grade. In practice, a factor 4 fits better for the the somewhat official stat we have for 9a to 9c but the history shows that many of them will probably get down graded. Anyhow, in one way, such calculation helps us to understand the width of the grades and how the grading system works. 1 = 9c (Ondra) 3.5 = 9b+ (Ondra, Sharma and Megos) 12 = 9b (Some 16 guys) 43 = 9a+ (Around 70 guys) 150 = 9a 525 = 8c+ 1 838 = 8c 6 433 = 8b+ 22 519 = 8b 78 815 = 8a+ 275 854 = 8a