I think gender is the one looked at most often, and in general, proportional representation systems using lists have far more women elected than we see in first past the post...[Technical difficulty—Editor] Putting several people on the ballot is a different process from just putting one or two.
Obviously if the aim is for a particular characteristic, that can be done in other ways. As it's done here, all parties have to put forward a certain number of women candidates, because otherwise they would not get their election expenses back.