I usually only skim over punch stats as it does not say the full picture. However, this shows how much Chisora was gassing. His punch output was very low (by his standards) in the last half of the fight.
I hope he retires now, he got the win. Deserved, but cannot help but feel that a rematch will be one-sided so I hope he retires on a high. He caught Joyce flush and when Joyce was going backwards - legitimate KD of course, but I think it wouldn't happen again. Chisora didn't really "wobble" Joyce much and had Joyce not gone down, he would have won the fight (as that was probably a 3-point swing round).