I think you can argue that there is more pedophilia in any vocation that has institutionalized contact with children, and that due to the institutions of the Catholic church (eg, altar boys with a person they are taught to inherently respect) it *might* be higher than in other professions. On the other hand, you could argue that since day-care center workers aren't (usually) under any sort of religious vow and many not feel any religious or moral inclination anyway, *they* might have a higher incidence.

I do think you can show that the Catholic Church has had a more successful institutional policy about sweeping it under the rug and (if necessary) paying the complaintants off than the much less-well-funded educational or day-care systems.