Last season he missed quite a few games too and we were significantly worse when he didn't play.
I think these statistics are useful to prove that we are a better team with him in than without, whether in a good or a bad side. Either that or he's lucky....and to paraphrase Napoleon I'd take a lucky forward any day of the week.
Not to mention that he was being played out on the left a lot of the time where he just wasn't effective, as Barnes was for a while.