Bill's header was 9%, CCV's bottom was 11%. because it was in the same minute it added up to 20% on the graph.
Interesting that CCV's bottom is more effective than Bill's head . Although they don't go to the accuracy level of body parts yet. Or positioning, the cross that was too high for Long / Long got under depending on your viewpoint in a recent game, got a high xG despite we all knowing he had to miss.