To an extent that table is about right - you would expect the teams nearer the top to get more penalties, as presumably they spend more time attacking and therefore more time in and around the penalty area. We haven't been great for a big chunk of the time discussed, so I would expect us to be in the lower half of penalties awarded.
What no-one can deny, however, is the huge outlier that is Manchester Utd. There is no way that fair or consistent decision making would see them awarded so many penalties, more than the likes of Liverpool and Man City - there is definitely a bias (conscious or otherwise) at play. I know it's anecdotal, but we all know that the at least two of the penalties they have been awarded against us in recent years would never have been given the other way around, and I doubt they would have been given had we been playing anyone else.
