Well it is a very rare match that has more than say 2 Penalties in it, in fact it's quite rare to have more than 1 if even that, so it's not much of a sample for an average to mean anything. It's pretty much 100 or 0% most of the time. Unless there's a PK shootout, average of couse goes down then, because there's at least 6 penalties in a shootout and usually more.