Office workers, police who sit around in schools, radar police, traffic police, etc. People who generally never meet a resisting arrest situation.
It's a good point I hadn't considered. all the same I have to imagine that there are more than 15% of officers who are going to be making some arrests. It's still probably a good place to start sifting through the data. I know that in my city there are a small number of officers that have repeatedly been sued for using excessive force, I wouldn't be surprised if these same aggressive assholes charged people for resisting arrest more than their fellow officers. The guy who shot a 12 year old girl with a bean bag round is the same guy who kicked in the ribs of a non-threatening mentally ill guy and is probably the same guy that lets situations get out of hand so he can beat some ass a lay a resisting arrest charge (Officer Chris Humphrys). The data might say something different but I'd be surprised if there isn't a correlation with cops who use excessive force who also charge people with resisting arrest more often because these are the kinds of cops that aren't good at controlling a situation with anything other than physical force.
According to the FBI website, New York has 35,000 officers and 15,000 civilian employees. Office workers are already discounted from the article's statistics. You're wrong.