I don't know why don't you look it up?
It would be a really shit way to adjust the statistic anyway. You can piss around the edge of the box for minutes at a time and not get a penalty shout, and you can lump a long ball and have a guy wiped out for a stonewall penalty without touching the ball once.
Clearly these are the 3 best teams in the country since 2009, so it's not a coincidence who's top of the list, but you'd need to be a lot more intelligent about the way you try to standardise the stat and get "who deserves the most penalties"